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The article presents the rationale behind the construction of the Oder-Vistula-Dniester Canal, the implementation phase of the project, the environmental impact and the remaining contemporary vestiges of the investment. The spatial turn approach has been used to study the state of inland navigation and the political and economic factors linked to it, both at the level of the Empire as a whole and at the level of Galicia and the micro-regions. The enactment of the Waterways Act 1901 was the result of political dealings, with economic considerations being of secondary importance. For the Empire, the canal was a means of appeasing national sentiment, while the regulation of the rivers flowing into the canal was seen by the local community as a means of preventing flooding. The inhabitants of the areas along the canal's route were opposed to the canal because it restricted their access to land. Despite attempts to continue the project after the collapse of the Empire, the project was eventually abandoned, leaving the canal and its associated investments as an infrastructural legacy of the Habsburg Empire. The canal had its greatest impact on the Carpathian rivers, the regulation of which irrevocably destroyed the natural bottoms of the valleys. • The construction of the canal was motivated by political rather than economic considerations. • The construction of the canal was mostly supported by Galician organisations and institutions. • The legacy of the unbuilt canal is the existing accompanying structures. • The canal definitely affected the development of shipping in the Second Republic of Poland. • The construction of the canal irrevocably destroyed the valleys of the Carpathians. [ABSTRACT FROM AUTHOR]

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This study explores the potential of inland navigation as a key component of Poland's sustainable transportation strategy, focusing on the Opole–Szczecin route. It emphasizes inland waterways as an eco-friendly and efficient alternative to road and rail transport, potentially revitalizing local economies and reducing dependency on more traditional transport modes. The use of the River Information Service (RIS) system is highlighted as to its role in enhancing the logistical efficiency and safety of inland water transport. The research includes a comparative analysis of cargo transport on the Opole–Szczecin route, using road, rail, and inland-waterway options, revealing the advantages of inland-waterway transport in terms of cost-effectiveness and environmental impact. Finally, the paper discusses the challenges and opportunities for the development of inland navigation in Poland, advocating for greater integration with other transport branches through innovative technologies like RIS. [ABSTRACT FROM AUTHOR]

The real-time and accurate detection and ranging of ships play a pivotal role in ensuring navigation safety, this study aims to enhance the navigation safety and environmental perception capabilities of inland waterway vessels. In the ship detection stage, addressing challenges such as large parameters, high computational complexity, and poor real-time performance in existing ship detection models, this paper proposes the MS-YOLOv5s ship target detection algorithm. This algorithm, based on YOLOv5s, utilizes the lightweight MobileNetV3-Small network to replace the original YOLOv5s feature extraction backbone network, thereby improving the detection speed. The results indicate that the parameter size of the MS-YOLOv5s model is 3.55M, only 50.49% of YOLOv5s. Achieving a detection rate of 50.28 FPS, the precision is 96.80%, and the mAP is 98.40%, striking a balance between high accuracy and low computational demand. In the depth estimation stage, influenced by the environment, leading to unstable measurement data, this paper proposes a binocular Kalman filter fusion ranging algorithm. The standard deviation of the ranging results is minimized to 6.032μm, which is one order of magnitude smaller than traditional ranging algorithms, significantly enhancing the robustness of the measurement results. Within a distance of 20m from the ship target, the error can be controlled within 3%, showcasing the applicability of the method proposed in this paper in complex inland waterway environments contributes to the enhancement of ships' environmental perception capabilities and navigation safety, holding positive implications for the development of intelligent vessels. [ABSTRACT FROM AUTHOR]

This article explores the eerie and uncanny qualities associated with the Midlands canal network, with particular focus on the gothic and weird fiction produced by three writers: Robert Aickman, Elizabeth Jane Howard, and L. T. C. Rolt. The article redresses the neglect canals have faced within the field of study known as the blue humanities and argues for the distinctive – and haunting – forms of affect and knowledge that canals can bring to humanities scholarship invested in bodies of water and their histories. Because of the extensive size of its canal network, the Midlands makes an excellent case study for establishing the role of the canal in the blue humanities. At the same time, the article argues for the value of apprehending the Midlands, particularly Birmingham and the surrounding region, as a richly aqueous or 'blue' space, a region saturated and shaped by its inland waterways. [ABSTRACT FROM AUTHOR]

Information about reproductive habitat and migration pathways is of paramount importance to restore migratory fish species. This study assesses the availability of spawning and nursery habitats for the European sturgeon (Acipenser sturio) in the delta and lower Rhine (covering over 350 river kilometres) as part of a larger feasibility assessment for a future restoration of this critically endangered species. The general approach has three steps: (1) the identification of the species' specific habitat requirements, based on a systematic literature review; (2) the collection and preprocessing of data from two countries, including the 1D and 2D modelling of water depths and flow velocities; and (3) GIS‐based mapping of spawning and nursery habitat. Based on a HSI score of 1, we identify a total of 0.75 km2 as minimal spawning habitat, potentially suitable for approximately 2500 female European sturgeons (one spawning site would use ~300 m2). This is sufficient, as currently, only an estimated maximum number of 750 adults exist. Suitable spawning habitat is mainly located in the German state of North Rhine‐Westphalia, whereas suitable nursery habitat is mainly located in the Netherlands. The availability is, however, significantly reduced by coastal infrastructure (damming) and inland navigation. The insights gained can be used to assess the current suitability of the river Rhine for the species' reintroduction and to identify opportunities for habitat restoration and protection for various life stages. The outcomes thus play an essential role in the conservation of the species. In addition, the modelling approach developed could be applied to other northwestern European rivers. This broader application would allow intercomparison and support decisions about which rivers are best suited for future reintroduction of the critically endangered European sturgeon. [ABSTRACT FROM AUTHOR]

With the development of inland navigation, small rivers have the demand for the construction of large-scale waterways. Taking the reach from Likou to Binlangtan of the Dongjiang River in China as an example, this paper analyzes the erosion and deposition process of the four shoals in this reach over the last 20 years; establishes a physical model dominated by the movement of the bed load for this reach; and utilizes this physical model to study the morphodynamical response of small rivers to large-scale waterway projects. The main conclusions are as follows: (1) the erosion and deposition process in the Dongjiang River can be divided into three stages: natural erosion and deposition equilibrium stage, generalized riverbed undercutting stage, and the self-adaptive adjustment stage. (2) Under the action of the large-scale waterway projects, decreasing of water levels caused by dredging can be remedied by adjusting the navigation channel bed elevation; local adverse flow caused by spur dike can be remedied by sealing the sand mining pit and shortening the dike head; the suction problem, caused by the navigable branch, can be remedied by adopting a compound channel section with multiple steps. (3) A new river regime is reshaped by waterway regulation spur dikes, and a new erosion and deposition state is formed. The layout of the navigation channels should follow the reshaped regime to reduce sediment deposition and ensure the navigation depth. This paper provides technical support for the construction of large-scale waterways in small rivers. [ABSTRACT FROM AUTHOR]

In inland waterways, waves generated by passing boats cause the movement of riprap used for bank protection and stabilization. Previous studies have mainly concerned the natural channel erosion problem caused by wind-generated waves and neglected the research and findings on shipping behavior. This work presents a coupling of the computational fluid dynamics model and the discrete element method. The aim is to first study the interactions between ship waves in the confined channel and the movements of the riprap of the banks and shorelines and second to analyze the stability of these armourstones under the actions of various ship velocities and draught depths. These varying conditions exert influence on the ship-induced waves, the crucial point being the drawdown amplitude, and consequently create more intense flow behavior in the near-shore region, which results in instability and destruction of the overall structure of the armor protection layer. The higher ship velocity and the larger draught depth lead to the aggravation of instability processes of the blocs composing the protective layer. There is a critical phenomenon in the influence mechanism of vessel velocity, whereas the variation process induced by draught depth is relatively linear. In addition, the stability of the blocs also depends on their shapes, sizes, and the initial positions within the protective layer. This study could contribute to the high-quality development of inland navigation. [ABSTRACT FROM AUTHOR]

The standard reconstruction of river-crossing bridges is an important component of waterway regulation projects, which has high investment and significant social impact. In waterway regulation projects, it is necessary to conduct a preliminary evaluation of the impact of navigation conditions on existing bridges. There are numerous river-crossing bridges along the Sushen Inner Port Line waterway, in the evaluation process, for bridges with significant difficulty in renovation due to insufficient clearance dimensions, the method of calculating the navigation capacity of the bridge area waterway is adopted to quantitatively analyze the degree of obstruction to navigation of the bridge. Theoretical analysis can be used to calculate the navigation capacity of the bridge area waterway. On the basis of the conventional channel capacity calculation method for the tidal section outside the gate, the navigation guarantee rate of each water level can be inferred using the cumulative frequency curve of tide level. The navigation guarantee rate is used as a correction coefficient to calculate the navigation capacity of the bridge area waterway. By comparing the calculated capacity of the waterway with the planned and designed freight volume, the necessity and urgency of bridge reconstruction can be preliminarily judged. [ABSTRACT FROM AUTHOR]

Motivated by the operational scenarios of lock scheduling, we propose a serial-lock chain navigation problem (SLCNP) modeled on the Three Gorges-Gezhouba Dam (TGGD) for the first time. Ship grouping, synchronized moving, and grouped waiting operations are integrated into the ship navigation process. A mixed integer programming (MIP) model that incorporates real-world constraints such as ship priority, service fairness, traffic flow equilibrium, and phased ship placement is presented to optimize ship throughput and ship stay time. To solve the SLCNP, a sort-pick strategy-based swarm intelligence algorithm (SPSSIA) framework is developed that integrates the characteristics of SLCNP through a hybrid multi-section encoding method and a two-stage heuristic decoding approach. A swarm intelligence evolution mechanism is used to improve the search ability and robustness of the framework. Several instances are generated based on real data to verify the correctness and effectiveness of the model and algorithm. Computational results demonstrate the applicability and effectiveness of the proposed SPSSIA. Further analysis of the experimental results indicates that the key impact factors significantly influence the navigational performance of the TGGD system. The results of this study will provide practical guidance for the operational processes of inland river hubs with comparable characteristics. [ABSTRACT FROM AUTHOR]

With the rise of artificial intelligence, ships are gradually becoming intelligent. Ship path planning, as the foundation of ship intelligence, has become a current research hotspot. To achieve the planning of ship collision avoidance paths, a hybrid ant colony algorithm and artificial potential field for optimal safety path planning was proposed. The model makes up for the disadvantages of the slow convergence rate and the easy local optimum. At the same time, the ant colony algorithm in turn makes up for the poor global search ability of the artificial potential field method, so that the algorithm can achieve accurate path planning. The test results show that in a simple environment, the hybrid ant colony algorithm, improved tangent and Dijkstra algorithm, and improved fast extended random tree * algorithm iterated about 7, 25, and 40 times respectively before starting to converge; In complex environments, the improved tangent and Dijkstra algorithms do not converge, while the improved fast expanding random tree * algorithm and hybrid ant colony algorithm iterate about 40 and 8 times respectively to begin convergence. It is clear that the mixed ant colony algorithm converges fast and can obtain the optimal path in the shortest time. The number of unsafe path points for the optimal path in a simple environment is 6, 1, and 0, respectively, for the improved tangent and Dijkstra algorithm, the improved fast expanding random tree * algorithm, and the hybrid ant colony algorithm; The number of unsafe path points for the optimal path in a complex environment is 9, 3, and 0, respectively; It can be seen that the path planned by the hybrid ant colony algorithm has higher security. The above results show that the mixed ant colony algorithm can effectively shorten the search time of optimal paths while improving the security of pathways. [ABSTRACT FROM AUTHOR]

The USACE boasts a navigation portfolio of over 19,312 km (12,000 mi) of shallow draft [from 2.74 m (9 ft) to 4.27 m (14 ft)] inland and intracoastal waterways, 20,921 km (13,000 mi) of deep draft [4.27 m (14 ft) and greater] channels, and 400 ports, harbors, and turning basins. To ensure that these channels remain navigable and at congressionally authorized dimensions, channel maintenance practices are performed annually by dredging. Most of these dredging operations are performed by private companies under contract to the USACE districts. With an abundance of navigation channel maintenance needs and a limited dredging fleet, accurate scheduling and the timely arrival of the dredging fleet is required. Project delays due to production issues, weather delays, contracting issues, or both will generally impact future scheduled projects, navigation, and commerce. Nonawardable bids happen when the contractor(s) proposal(s) are too high compared with the Independent Government Estimate (IGE). These nonawardable bids lead to significant time delays, because the USACE district must then engage in bid verification calls, negotiations, the potential cancellation of the contract solicitation, or both and the subsequent resolicitation for work. Therefore, it is extremely important that USACE cost estimates adequately reflect the level of effort the project requires when capturing all project-associated costs. This paper aims to summarize the USACE conceptual approach to dredge cost estimating by highlighting the complex variables that are associated with this type of estimate. [ABSTRACT FROM AUTHOR]

Despite the potential cost reduction and environmental friendliness of inland lock waterways, there is a noticeable lack of scientific research on their efficiency and performance. Moreover, empirical insights into the impact of waterway locks on logistics systems are insufficient. Similarly, despite extensive research on data envelopment analysis (DEA) in various logistics contexts, the efficiency of waterway locks remains underexplored. This study addresses these gaps by evaluating inland waterway transposition efficiency based on operational aspects and handling capacity. In this study, data from nine primary inland waterway locks in an emerging economy were examined, comparing their relative efficiency by input-output relationships. Efficiency indices, performance objectives, benchmarks, composite efficiency, and separability conditions were calculated and analyzed. Our results highlight external factors like vessel numbers and volume as efficiency influencers. The study uncovers strategies to enhance efficiency, mainly through operational improvements or leveraging performance indices from other units. Empirical findings present opportunities to optimize maritime logistics operations, especially in countries with expansive territories. This is a novel research that introduces efficiency analysis models for inland waterway locks and offers actionable insights for an underexplored research area. Lastly, the article offers promising research opportunities for maritime logistics systems' performance. [ABSTRACT FROM AUTHOR]

The rapid development of high techniques in recent years has made the operation of intelligent ships a possible option in foreseeable future. This will inevitably change the navigation environment of ships. Both conventional and intelligent ships will sail in the same channels and water areas. This research proposed a framework to meet the needs of future waterway transportation safety in such a mixed environment. The proposed framework can model and assess the risk of inland waterway transportation in a mixed traffic environment of remote-control and conventional ships. It defined four stages of the mixed traffic scenario in inland rivers, including perception, cognition, decision, and control stage. On this basis, we explored the risk factors under mixed traffic scenario, and construct the system dynamics model of transportation risk accordingly. A case study of risk modelling and assessment of inland waterway transportation systems in continuous bridge areas under the mixed environment was conducted to validate the proposed method. The results showed that the proposed framework can identify the main stages and key factors affecting inland waterway transportation system safety under the mixed traffic environment. This research provides a theoretical basis for the safety supervision of remotely controlled ship operations in future. [ABSTRACT FROM AUTHOR]

Compared to maritime vessel traffic accidents, there is a scarcity of available, and only incomplete, accident data for inland waterway accidents. Additionally, the characteristics of different waterway segments vary significantly, and the factors affecting navigation safety risks and their mechanisms may also differ. Meanwhile, in recent years, extreme weather events have been frequent in inland waterways, and there has been a clear trend towards larger vessels, bringing about new safety hazards and management challenges. Currently, research on inland waterway navigation safety risks mainly focuses on risk assessment, with scarce quantitative studies on risk mitigation measures. This paper proposes a new method for improving inland waterway traffic safety, based on a cost-effectiveness trade-off approach to mitigate the risk of vessel traffic accidents. The method links the effectiveness and cost of measures and constructs a comprehensive cost-benefit evaluation model using fuzzy Bayesian and quantification conversion techniques, considering the reduction effects of risk mitigation measures under uncertain conditions and the various costs they may incur. Taking the upper, middle, and lower reaches of the Yangtze River as examples, this research evaluates key risk mitigation measures for different waterway segments and provides the most cost-effective strategies. Findings reveal that, even if different waterways share the same key risk sources, the most cost-effective measures vary due to environmental differences. Moreover, there is no inherent correlation between the best-performing measures in terms of benefits and the lowest-cost measures, nor are they necessarily recommended. The proposed method and case studies provide theoretical support for scientifically formulating risk mitigation measures in complex environments and offer guidance for inland waterway management departments to determine future key work directions. [ABSTRACT FROM AUTHOR]

An investment gap in America's inland waterways (IWWs) has been fueled by decades of low investments, which has negatively impacted the reliability of the waterway's locks. US IWWs, which transport commodities and support the nation's economy, are aging rapidly, exacerbated by decades of underinvestment. Many of these infrastructure systems now need to address a substantial maintenance backlog to increase their life span and improve functionality. Optimizing the decision-making process for effective and efficient planning and policymaking is essential to perform this requisite maintenance. Recognizing the robust scope of this maintenance, long-term maintenance strategies are needed in order to optimize investments across these waterway systems to improve their condition. Currently, limited research exists on decision making on IWW transportation assets, and there is a lack of requisite guidance for optimally performing maintenance activities on a single lock on the IWW system. Therefore, this study focuses on developing a decision-making model that considers several uncertainties toward optimizing the maintenance of locks on IWWs. The model evaluates maintenance decisions on an IWW lock using data obtained via expert elicitation. Results obtained from compiling the influence diagram (ID) and performing sensitivity analysis on the model support the need for periodic inspection of the locks to assess the condition before making any maintenance decision. The study presents a novel approach for enhancing maintenance decisions on IWW assets by considering key uncertainties beyond the physical condition of the assets. This research sets the stage for further studies on how fiscal constraints affect infrastructure asset maintenance decisions. [ABSTRACT FROM AUTHOR]

Introduction: This study investigates the characteristics of sediment disturbance caused by impeller rotation in reservoirs of inland rivers with high sediment content in China. A scaled experimental model, reflecting typical environmental conditions of inland water reservoirs in Northwest China, was established in Lanzhou, Gansu Province, following the principle of similarity. Methods: The study integrates numerical simulations using Ansys Fluent software and corroborates the findings through hydraulic experiments. Computational Fluid Dynamics (CFD) and the κ-ε Realizable model were employed to simulate the solid-liquid mixing process, which was verified against the experimental model. Results: The results indicate that increasing the impeller velocity from 2 rad/s to 8 rad/s, while submerged at a depth of 1000 mm in the flow field, enhances the rate of bottom sediment suspension. Furthermore, the rate of suspended sediment discharge from the model outlet increased with inflow velocity ranging from 0.1 m/s to 0.8 m/s. A decrease in the impeller's submersion depth from 600 mm to 1200 mm was found to reduce the maximum disturbance radius affecting the bottom sediment. Discussion: The reliability of the simulation was confirmed by comparing the software results with experimental data. This study provides insights into the mechanisms of sediment-laden flow disturbance in the reservoir areas of inland rivers in China and lays the groundwork for more comprehensive investigations into sediment discharge in these environments. [ABSTRACT FROM AUTHOR]

Inland waterway locks have become significant bottlenecks in waterway networks worldwide due to the disruptions caused by aging infrastructure and climate change. While these locks have traditionally received attention for traffic issues, the disruptive impact on the regional economy remains unclear. This study addresses this knowledge gap by assessing the economic impacts of inland water transportation system failures, specifically focusing on disruptions in agricultural commodities within the Upper Mississippi River–Illinois River (UMR–IR) region. These disruptions encompass both unscheduled climate-induced extreme weather events and scheduled maintenance and repair work due to internal system failure. To capture the spatial interdependence between the regional economy and shipping rate changes caused by disruptions, we developed an integrated modeling approach. This approach combines spatial econometric modeling and multi-regional computable general equilibrium modeling techniques. Detailed weekly data from 2013 to 2021, including variations in inland barge rates and environmental conditions, were utilized. The assessment reveals that lock closure events in the UMR-IR region have severe economic consequences, impacting both the region itself and beyond. Conversely, transportation resilience achieved through modal substitution from barge to rail services during disruptive events can substantially reduce GDP losses. Specifically, such resilience measures can reduce GDP losses in the UMR-IR region by 6.6–24.2% and in the rest of the USA by 5.2–19.5%. Overall, these research findings carry significant implications for future planning and investment in inland waterway systems. [ABSTRACT FROM AUTHOR]

Reservoirs exert a profound influence on the cycling of dissolved organic matter (DOM) in inland waters by altering flow regimes. Biological incubations can help to disentangle the role that microbial processing plays in the DOM cycling within reservoirs. However, the complex DOM composition poses a great challenge to the analysis of such data. Here we tested if the interpretable machine learning (ML) methodologies can contribute to capturing the relationships between molecular reactivity and composition. We developed time‐specific ML models based on 7‐day and 30‐day incubations to simulate the biogeochemical processes in the Three Gorges Reservoir over shorter and longer water retention periods, respectively. Results showed that the extended water retention time likely allows the successive microbial degradation of molecules, with stochasticity exerting a non‐negligible effect on the molecular composition at the initial stage of the incubation. This study highlights the potential of ML in enhancing our interpretation of DOM dynamics over time. Plain Language Summary: As a comprehensive man‐made infrastructure, reservoirs significantly influence the chemical composition, reactivity, and turnover time of dissolved organic matter (DOM) within inland waters. However, it remains elusive how DOM molecules respond to microbial processing over different time scales. Besides the well‐recognized predictive power of machine learning (ML) methodologies, we delved into the processes of tuning the ML models to acquire additional interpretability. We used an under‐sampling strategy to improve model performance and simultaneously observed the variations in model performance metrics for different biological reactivity pools over incubations with different durations. We find that shorter incubation periods result in a broader range of molecules disappearing, with a greater contribution of stochasticity, while the longer incubation allows the successive biodegradation of oxygen‐poor compounds, with a greater contribution of directed degradation. As a complement to traditional geochemical methods, we unveiled a novel perspective in understanding the DOM dynamics over time using ML. Key Points: Machine learning (ML) models were built to correlate the molecular composition and biological reactivity at the world's largest reservoirShorter incubations result in a broader range of molecules disappearing, with a greater contribution of stochasticityTuning the ML model contributes to yield additional interpretability beyond its well‐recognized predictive power [ABSTRACT FROM AUTHOR]

Ports and wharves are essential parts of the infrastructure that enable the transport of goods on inland waterways. Integrating the network of inland waterways and land modes of transport, the ports are the main hubs of the transport network, they encourage economic activities and enable the development of the region. The port of "Novi Sad" is located on the left bank of the Danube River, river km 1254, and is open to international traffic. This is an exceptional location where water corridor (VII) and Pan-European Corridor X intersect and form a hub for international communication and transport. Novi Sad port's location strength is not only of a geographical nature, it also has excellent transport links as it is only 0.3 km from the railway junction of Corridor X and 3 km from the land Corridor X. The development of the port of "Novi Sad" would be related to the growth of it's industry in the background. Considering the favorable geographical position and the growing economic activity, especially in the trade exchange with the countries that are in the Black Sea basin, the port of "Novi Sad" could achieve the status of a river-sea port in addition to it's international status. In accordance with the Water Transport Development Strategy of Republic of Serbia, the port of "Novi Sad" could be developed to the extent that it becomes competitive on the market and provides transboatment and storage services in accordance to the world standards. [ABSTRACT FROM AUTHOR]

The article presents model of the Radio--communications Platform supporting Inland Navigation. The model of integrated satellite, analog and digital radio -- communications systems has been presented. Individual blocks included in the module architecture has been developed. A communication model which integrates the Galileo system with Inland-AIS for the purpose of obtaining a reliable position in limited waters has been presented. The functional requirements of the Galileo Satellite System for integration with Inland-AIS in restricted areas was characterized. The integration of satellite systems was analysed in order to improve the compatibility of Communication Systems. [ABSTRACT FROM AUTHOR]

Civil infrastructure underpins urban receipts of food, energy, and water (FEW) produced in distant watersheds. In this study, we map flows of FEW goods from watersheds of the contiguous United States to major population centers and highlight the critical infrastructure that supports FEW flows. To do this, we draw upon detailed records of agriculture, electricity, and public water supply production and couple them with commodity flow and infrastructure information. We also compare the flows of virtual water embedded in food and energy commodity flows with physical water flows in inter‐basin water transfer projects around the country. We found that the virtual blue water transfers through crops and electricity to major US cities was 53 billion and 8 billion m3 in 2017, respectively, while physical interbasin water transfers for crops, electricity, and public supply water averaged 20.8 billion m3. Highways are the primary infrastructure used to import virtual water associated with food and fuel into cities, although waterways and railways are most utilized for long‐distance transport. All of the 204 watersheds in the contiguous US support the food, energy, and/or water supplies of major US cities, with dependencies stretching far beyond each city's borders. Still, most cities source the majority of their FEW and embedded water resources from nearby watersheds. Infrastructure such as water supply dams and inland ports serve as important buffers for both local and supply‐chain sourced water stress. These findings can inform efforts to reduce water resources and infrastructure risks in domestic supply chains. Key Points: Civil infrastructure enables US cities to access FEW resources from distant watershedsMost cities depend on nearby watersheds for FEW and embedded waterVirtual water transfers through food and energy exceed physical water transfers [ABSTRACT FROM AUTHOR]

Intelligent navigation is a crucial component of intelligent ships. This study focuses on the situational awareness of intelligent navigation in inland waterways with high vessel traffic densities and increased collision risks, which demand enhanced vessel situational awareness. To address perception data association issues in situational awareness, particularly in scenarios with winding waterways and multiple vessel encounters, a method based on trajectory characteristics is proposed to determine associations between Automatic Identification System (AIS) and radar objects, facilitating the fusion of heterogeneous data. Firstly, trajectory characteristics like speed, direction, turning rate, acceleration, and trajectory similarity were extracted from ship radar and AIS data to construct labeled trajectory datasets. Subsequently, by employing the Support Vector Machine (SVM) model, we accomplished the discernment of associations among the trajectories of vessels collected through AIS and radar, thereby achieving the association of heterogeneous data. Finally, through a series of experiments, including overtaking, encounters, and multi-target scenarios, this research substantiated the method, achieving an F1 score greater than 0.95. Consequently, this study can furnish robust support for the perception of intelligent vessel navigation in inland waterways and the elevation of maritime safety. [ABSTRACT FROM AUTHOR]

In inland waterways, there is a high density of various objects, with a predominance of small objects, which can easily affect navigation safety. To improve the navigation safety of inland ships, this paper proposes a new lightweight water-surface object-detection model named LWS-YOLOv7, which is based on the baseline model YOLOv7. Firstly, the localization loss function is improved and the w-CIoU function is introduced to reduce the model's sensitivity to position deviations of small objects and to improve the allocation accuracy of positive and negative sample labels. Secondly, a new receptive field amplification module named GSPPCSPC is proposed to reduce the model's parameters and enhance its receptive field. Thirdly, a small-object feature-fusion layer, P2, is added to improve the recall rate of small objects. Finally, based on the LAMP model pruning method, the weights with lower importance are pruned to simplify the parameters and computational complexity of the model, facilitating the deployment of the model on shipborne devices. The experimental results demonstrate that, compared to the original YOLOv7 model, the map of LWS-YOLOv7 increased by 3.1%, the parameters decreased by 38.8%, and the GFLOPS decreased by 28.8%. Moreover, the model not only has better performance and higher speed for input images of different sizes, but it can also be applied to different meteorological conditions. [ABSTRACT FROM AUTHOR]

Purpose: The aim of the analysis was to demonstrate the level of public transport efficiency in Poland on the example of various modes of transport in selected years. Methodology: Analysis of data from the library of the Central Statistical Office. Findings: The evaluation results obtained from the analysis showed the advantage of road transport, which is systematically growing in the field of passenger transport, and the upward trend is also noticeable in air transport. The number of passengers using rail transport services is decreasing, but it still constitutes a significant part of the total transport traffic, and the investments made allow us to think about improving the current state of affairs. The share of sea transport and inland navigation in passenger traffic is small. Originality/value: The publication discussed the topic public transport efficiency in Poland on the example of cargo transport in the years 1995-2022. Combining interdisciplinary research in the areas of management and quality sciences with economics and finance. [ABSTRACT FROM AUTHOR]

Lotic ecosystems are sources of greenhouse gases (GHGs) to the atmosphere, but their emissions are uncertain due to longitudinal GHG heterogeneities associated with point source pollution from anthropogenic activities. In this study, we quantified summer concentrations and fluxes of carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and dinitrogen (N2), as well as several water quality parameters along the Rhine River and the Mittelland Canal, two critical inland waterways in Germany. Our main objectives were to compare GHG concentrations and fluxes along the two ecosystems and to determine the main driving factors responsible for their longitudinal GHG heterogeneities. The results indicated that the two ecosystems were sources of GHG fluxes to the atmosphere, with the Mittelland Canal being a hotspot for CH4 and N2O fluxes. We also found significant longitudinal GHG flux discontinuities along the mainstems of both ecosystems, which were mainly driven by divergent drivers. Along the Mittelland Canal, peak CO2 and CH4 fluxes coincided with point pollution sources such as a joining river tributary or the presence of harbors, while harbors and in-situ biogeochemical processes such as methanogenesis and respiration mainly explained CH4 and CO2 hotspots along the Rhine River. In contrast to CO2 and CH4 fluxes, N2O longitudinal trends along the two lotic ecosystems were better predicted by in-situ parameters such as chlorophyll-a concentrations and N2 fluxes. Based on a positive relationship with N2 fluxes, we hypothesized that in-situ denitrification was driving N2O hotspots in the Canal, while a negative relationship with N2 in the Rhine River suggested that coupled biological N2 fixation and nitrification accounted for N2O hotspots. These findings stress the need to include N2 flux estimates in GHG studies, as it can potentially improve our understanding of whether nitrogen is fixed through N2 fixation or lost through denitrification. [ABSTRACT FROM AUTHOR]

Purpose: This study aims to evaluate the operational performance and service quality of inland waterway transport in Warri Southwest, Nigeria, by examining the factors that influence them. Methodology: The study employs a quantitative research approach, using a structured questionnaire to collect data from 180 respondents. The data is analyzed using regression analysis and a structural equation model (SEM) with the help of PLS Software Version 13.0. Results: The findings indicate that cargo clearance, infrastructure quality, and storage facilities significantly influence the performance of agent operation in inland waterway transport (p=0.000). Staff performance also directly impacts the provision of logistical services, which affects customer service. However, jetty operations do not promote operational performance (p=0.075). Additionally, staff performance does not significantly influence the association between jetty operation and performance and the relationship between cargo clearance and infrastructure level (p=0.136, 0.388). Theoretical contribution: This study contributes to the literature on inland waterway transport by providing empirical evidence on the factors influencing operational performance and service quality. The findings can help inform the development of policies and strategies to improve the efficiency and effectiveness of inland waterway transport in Nigeria and other similar contexts. Practical implications: The study's recommendations include improving the quality of infrastructure, cargo clearance processes, and storage facilities to enhance operational performance. Additionally, investing in staff training and development can improve the provision of logistical services and, in turn, customer service. The study also suggests that the government and relevant stakeholders should prioritize the development of inland waterway transport to unlock its potential for socioeconomic development, particularly in rural and hard-to-reach areas. [ABSTRACT FROM AUTHOR]

Sorting out the requirements for intelligent functions is the prerequisite and foundation of the top-level design for the development of intelligent ships. In light of the development of inland intelligent ships for 2030, 2035, and 2050, based on the analysis of the division of intelligent ship functional modules by international representative classification societies and relevant research institutions, eight necessary functional modules have been proposed: intelligent navigation, intelligent hull, intelligent engine room, intelligent energy efficiency management, intelligent cargo management, intelligent integration platform, remote control, and autonomous operation. Taking the technical realization of each functional module as the goal, this paper analyzes the status quo and development trend of related intelligent technologies and their feasibility and applicability when applied to each functional module. At the same time, it clarifies the composition of specific functional elements of each functional module, puts forward the stage goals of China's inland intelligent ship development and the specific functional requirements of different modules under each stage, and provides reference for the Chinese government to subsequently formulate the top-level design development planning and implementation path of inland waterway intelligent ships. [ABSTRACT FROM AUTHOR]

Groundwater‐surface water interactions (GSI) connect rivers and streams with riparian areas and the adjacent aquifer. Although these interactions exert a substantial control of quantity and quality of both groundwater and surface water, knowledge on GSI along rivers at the regional scale, particularly for inland waterways, is still limited. We investigated GSI along the river Moselle, an important federal inland waterway in Germany, by using radon and tritium to identify gaining (water flux from the aquifer to the surface water) and losing (water flux from the surface water to the aquifer) stream conditions, respectively. Gaining stream conditions were identified by continuously measuring radon along the river during boat surveys with a high spatial resolution (every 2 km) during intermediate (October 2020) and near low flow conditions (August/September 2021). The tritium concentrations in surface water and groundwater and the resulting tritium inventories were used to characterize losing stream conditions Monthly tritium inventories from 2017 to 2022 revealed a mean loss for the whole period of 20.3 % and a mean gain of 21.8%. Both were probably triggered by a combination of losing stream conditions and flood‐induced mass transfer of water from the aquifer back into the river as well as discharge fluctuations. At the investigated site Lehmen there were direct indications of an influence of surface water due to elevated tritium concentrations in the groundwater (up to 13.3 Bq L−1). Using radon mass balance modelling, good agreements of simulated versus measured radon data with respect to two groundwater end‐member scenarios were obtained during intermediate flow (Spearman's ρ: 0.97 and 0.99; MAE: 10.1 and 3.4 Bq L−1) and near low flow (Spearman's ρ: 0.97 and 0.99; MAE: 11 and 6.5 Bq L−1). Considerable groundwater inflow was limited to the meander of Detzem, where cumulated groundwater inflow of about 19 m3 s−1 (9.5% of total discharge) and 4.2 m3 s−1 (3.8% of total discharge) was simulated during intermediate and near low flow, respectively. However, the groundwater inflow was relatively low compared to alpine streams, for example. The study will help to better identify and quantify GSI at the regional scale and provide methodological guidance for future studies focusing on inland waterways. [ABSTRACT FROM AUTHOR]

Digital twin is an attractive technology for the representation of objects due to its ability to produce precise measurements and their geovisualisation. Of special interest is the application and fusion of various remote sensing techniques for shallow river and inland water areas, commonly measured using conventional surveying or multimodal photogrammetry. The construction of spatial digital twins of river areas requires the use of multi-platform and multi-sensor measurements to obtain reliable data of the river environment. Due to the high dynamics of river changes, the cost of measurements and the difficult-to-access measurement area, the mapping should be large-scale and simultaneous. To address these challenges, the authors performed an experiment using three measurement platforms (boat, plane, UAV) and multiple sensors to acquire both cloud and image spatial data, which were integrated temporally and spatially. The integration methods improved the accuracy of the resulting digital model by approximately 20 percent.

Pilot tests for (semi-)autonomous transport via inland waterways are already taking place in Belgium and other European countries. However, the full commercial implementation of autonomous inland shipping might be hampered by liability issues. The allocation of liability, especially extracontractual liability, is an important concern for shipowners who want to invest in autonomous barges, and for other ecosystem actors. For this reason, a balanced risk distribution framework could boost the investment decision. A legal analysis of the current laws and regulations is necessary to evaluate whether they can be applied to new autonomous systems. The research approach consists of two steps. First, an in-depth literature review is carried out to determine whether extracontractual liability research has already been conducted and to highlight the gaps in autonomous inland waterways transport studies. Once it is proved that the vast majority of the research focuses on technology, it can be affirmed that there is a need to inquire about extracontractual liability. In the second part, thus, the two international Conventions on liability limitation and collision in inland navigation are examined. [ABSTRACT FROM AUTHOR]

Emissions originating from inland navigation should be reduced to achieve climate targets. This paper aims to identify (1) onboard GHG emission measurement systems, (2) calculation methods for GHG emissions of inland vessels and (3) reduction measures. A systematic literature review, examining 6 databases, yielded 105 initial outcomes, with 17 relevant references. The review reveals a scarcity of studies, with the majority concentrated in Europe and Asia, while North America, Africa, Australia, and South America remain largely unexplored. Four of the seventeen relevant studies focused on real-world GHG emissions measurement. Future research should explore more efficient and calibrated approaches for real-time CO2 insights in inland vessels. In the section on calculating GHG emissions, most papers attempt to adapt the EEDI or EEXI to inland navigation. Reduction measures for GHG emissions concentrate on alternative fuels, like LNG, methanol, hydrogen, or alternative power sources. As the research in this area is limited, prioritizing it in academic discourse is not only essential for advancing our understanding but also imperative for shaping a resilient and environmentally conscious future for inland navigation. [ABSTRACT FROM AUTHOR]

Among the factors determining the competitiveness of transportation sectors, those associated with travel time play a crucial role. Constant availability of transportation services over time is a key factor. Inland waterway transport is believed to exhibit seasonal fluctuations in cargo flows, implying limited service provision during specific periods in the annual cycle. This article compares the variability of cargo transport over time in inland waterway shipping with that in other land transportation modes. The hypothesis is that the periodic fluctuations in cargo transport during the annual cycle in inland waterway shipping are not significantly different from those in other transport sectors. The analysis of transport variability over time is based on the indicators of periodic fluctuations in land transportation modes from 2005 to 2022. Statistical inference was conducted using variance analysis. As the conditions for applying the ANOVA procedure were not met, the Kruskal–Wallis test was employed as a nonparametric alternative to variance analysis. The research results indicate that there is no basis to reject this hypothesis in the group of examined Western European countries. Different results were obtained in Poland, where cargo transport in inland waterway shipping exhibited more significant variability over time than other transport modes. The results obtained from this research can serve as a source of knowledge for entities and institutions responsible for implementing the concept of sustainable development in transportation. The proposed European Green Deal concept in December 2019 states, "The role of rail and inland waterways in land freight transport should be significantly increased first and foremost...". Despite limited service availability during specific periods of the annual cycle (due to seasonal and random factors), the research results confirm that in countries with well-developed waterways, inland water transport remains competitive compared with other land transport modes. These findings can also be a significant signal for policymakers in countries with extensive inland waterways (e.g., Poland) that may need to fully appreciate the advantages of this mode of transport, partly due to its susceptibility to periodic fluctuations in transport. The research results and formulated conclusions can also be addressed to existing and potential shippers. The confirmed higher or comparable capability of inland navigation to achieve consistent transport volumes during different periods of the annual cycle can be an encouraging factor for incorporating this mode into supply chains. [ABSTRACT FROM AUTHOR]

China has a vast territory and a long history of inland navigation. This paper is based on the Shaying River Shenqiu hub project, and a normal physical model with a geometric scale of 65 was established to simulate the characteristics of water and sediment in the entrance area of the project. By setting different working conditions and measuring and analyzing the velocity flow pattern of the wharf area, planning suggestions for the artificial channel with straight cut-off can be given. Simultaneously, the study simulates the natural sediment deposition state in typical years, observing changes in terrain and evaluating their impact on navigation, thereby validating the rationality of scouring and desilting processes. The research findings indicate that in the reconstructed river wharf's entrance area, the flow velocity is low, and the flow pattern is stable, ensuring that the transverse flow velocities along the recommended route meet the requirements for vessel navigation. Post-scouring from the regulating gate discharge, downstream deposition decreases, with a sediment flushing efficiency reaching 68.5%. Under the specified conditions, the thickness of sediment deposition after scouring does not negatively affect the water level for ships entering or departing the wharf. The results of this study may offer valuable reference insights for the planning of artificial rivers in similar terrains. [ABSTRACT FROM AUTHOR]

The article examines the economic and legal issues of inland navigation development based on the materials of Germany and Ukraine. The relevance of the paper of economic and legal aspects of the development of inland navigation and the legal status of a shipowner is due to their importance for science and practice and insufficient development in Ukraine, as well as a significant expansion of inland navigation against the background of curtailment of sea traffic due to Russian military restrictions on the Black Sea. The purpose of the study is to identify and analyse the economic and legal factors that contribute to the improvement of inland navigation. The authors use the methods of analysis and comparison of theoretical concepts and legal norms, and the method of socio-economic statistics is also used to argue proposals on the topic under study. The paper shows the connection between the concepts of inland navigation law and inland waterways law. This work uses German-language works by W. Korioth, J.-H. Krumme, T. Waldstein, H. Holland. The subject and direction of research of Ukrainian scientists P. Kazanski, A. V. Kulko, A. P. Efimenko, E. A. Samoilenko and G. V. Samoilenko are determined. The results of the study allowed to expand the understanding of the subject matter of inland navigation law as a set of predominantly private law provisions regulating relations in the field of navigation use of inland waterways. The research analyses the theoretical and regulatory foundations of the concept of inland waterway and indicators of the level of socio-economic development of Ukraine and Germany, which influence the state and development of concepts and norms of inland navigation law. Economic justification is provided for the limits of possible increase in cargo transportation, which may have a stimulating effect on the development of inland navigation law. It is proposed to adopt the best German experience and a temporary solution to the problem of the lack of regulations in the field of inland waterway transport of Ukraine.

Compared to maritime vessel traffic accidents, there is a scarcity of available, and only incomplete, accident data for inland waterway accidents. Additionally, the characteristics of different waterway segments vary significantly, and the factors affecting navigation safety risks and their mechanisms may also differ. Meanwhile, in recent years, extreme weather events have been frequent in inland waterways, and there has been a clear trend towards larger vessels, bringing about new safety hazards and management challenges. Currently, research on inland waterway navigation safety risks mainly focuses on risk assessment, with scarce quantitative studies on risk mitigation measures. This paper proposes a new method for improving inland waterway traffic safety, based on a cost-effectiveness trade-off approach to mitigate the risk of vessel traffic accidents. The method links the effectiveness and cost of measures and constructs a comprehensive cost-benefit evaluation model using fuzzy Bayesian and quantification conversion techniques, considering the reduction effects of risk mitigation measures under uncertain conditions and the various costs they may incur. Taking the upper, middle, and lower reaches of the Yangtze River as examples, this research evaluates key risk mitigation measures for different waterway segments and provides the most cost-effective strategies. Findings reveal that, even if different waterways share the same key risk sources, the most cost-effective measures vary due to environmental differences. Moreover, there is no inherent correlation between the best-performing measures in terms of benefits and the lowest-cost measures, nor are they necessarily recommended. The proposed method and case studies provide theoretical support for scientifically formulating risk mitigation measures in complex environments and offer guidance for inland waterway management departments to determine future key work directions.

There are approximately 7,000 miles of inland waterways in the UK, many of them built during the 18th and 19th centuries principally to transport bulk materials. These waterways provide numerous benefits to society and the economy. However, they have untapped potential for freight transport which could be released to provide more efficient solutions compared to other modes of transport. In addition to providing solutions to reduce emissions from land or air transportation, inland waterways also bring environmental and public health benefits to local communities. Therefore, these blue-green spaces should play a central role in government and local authority planning. This article explores some of the issues which prevent full use of inland waterways transportation from being achieved from the hydrodynamics point of view. Specifically, the concepts and ideas underpinning vessel operation are reviewed and discussed in detail in this article. It is shown how hydrodynamic concepts can inform public policy to maximise the efficiency of transportation from inland waterways.

Over the years, the demand for transportation has experienced a consistent rise, which has exacerbated a multitude of issues including environmental, visual, and noise pollution, congestion, land use conflicts, and various other related challenges. In this regard, the pursuit of alternatives aimed at mitigating these adverse effects stands as a priority for governments and policymakers. Consequently, inland waterway transport (IWT) emerges as an appealing solution, due to its advantages across the social, environmental, and economic considerations. However, in relation to IWT the concept of sustainable development is insufficiently investigated. The objective of this paper is to undertake a comprehensive review of how the concept of sustainable development is addressed and applied within the framework of IWT systems. To achieve this goal, a systematic literature review was meticulously conducted, utilizing three academic databases (Scopus, Google Scholar, and EBSCO). The review process yielded a total of 51 papers that proved to be pertinent and relevant to the subject matter. The comprehensive literature review facilitated the delineation of the principal elements, factors, and characteristics of the IWT system, as well as the primary drivers for its sustainable development. However, the implications for further research were identified, such as a comprehensive examination of each case due to the distinct geographical, social, economic, and political conditions inherent to each individual basin. That is essential for understanding the unique barriers present within each context and for formulating viable solutions aimed at fostering and incentivizing the sustainable development of IWT systems. [ABSTRACT FROM AUTHOR]

Ramakrishnan, B.; Gavali, M., and Jeyaraj, S., 2024. Comprehensive analysis of siltation behavior in the navigation channel of Deendayal Port (India): Field observations, numerical modeling, and engineering solutions. Journal of Coastal Research, 40(1), 138–149. Charlotte (North Carolina), ISSN 0749-0208. Deendayal Port, formerly Kandla Port, is one of India's busiest ports, with a deep inland navigation channel that facilitates easy trade but has been plagued by siltation issues for decades because of the hydromorphodynamic characteristics of this region. This study aims to understand the siltation behavior in the port's navigation channel through field observations and numerical modeling and to suggest suitable engineering solutions. The in situ observations of tidal levels, currents, suspended sediment concentration, and multitemporal bathymetry datasets are used to calibrate a numerical model, developed using Delft3D, to estimate the hydromorphodynamics. As an engineering solution, porous barriers of different lengths and layouts are introduced in the numerical model to minimize siltation along the sides of the channel. It is observed that placing three porous barriers has reduced the siltation by 46 to 56% in the main navigation channel leading to the port. In practice, these porous barriers could be a silt curtain–type structure, which has successfully been adopted in several ports across the globe as an effective siltation stopper. [ABSTRACT FROM AUTHOR]

Signage is an aid to wayfinding and individual orientation in both organisations and everyday life. It aims to respond to users’ needs. Whether or not it actually succeeds in this can only be empirically verified by an evaluation that is tailored to the context in question. Spacious cemeteries are a particularly interesting case, as they are a place both of mourning and of relaxation. When visitors in a fragile emotional state want to find their way to a grave, they have to be able to depend on particularly effective signage. The present study of a pilot project at the Zurich Sihlfeld Cemetery in 2022/2023 uses a “shadowing” methodology in such a context for the first-ever time. This is because other common approaches to evaluating signage are inappropriate here for ethical reasons – whether these be surveys, giving test subjects specific search tasks, or using eye-tracking. We observed and assessed 49 target persons across all the segments of the cemetery in their general orientation behaviour, the degree to which they consulted the signage offered, and their use of other aids on their way to the burial in question. We used our observations to analyse deviations from the ideal access routes; our photographic records provide us with a basis for further optimisation measures. [ABSTRACT FROM AUTHOR]

Finding one’s way around complex and large buildings, such as hospitals, airports, and educational facilities, can be challenging. Using maps and signage to address wayfinding issues in such buildings is one of the most common solutions. Despite extensive research on maps and signage, few studies have systematically explored how and when people use maps and signage in real-world situations during interior wayfinding. To address this gap, an exploratory, qualitative approach was adopted. Eleven participants were tasked with finding 12 targets within two university buildings. Participants were asked to voice out their thoughts (think-aloud protocol) while carrying out the tasks. Their think-aloud protocol and behavior were recorded and analyzed. The results revealed that the type of initial information available about the target could influence participants’ preferences for maps over signage or vice versa. Maps were not often used as the first strategy during wayfinding. Participants were perplexed when they consulted maps in different corridors because each map rotated differently to align with the adjacent corridor. Design issues regarding maps and signage were identified and discussed. [ABSTRACT FROM AUTHOR]

To address the limitations of existing bridge anti-ship collision devices, which cannot protect both ships and bridges, this study introduced a hydraulic high-energy beam for inland navigation safety. Using a bridge as the technical basis and a typical ship in a navigable river section as the research object, the reasonable deployment angle of the device was investigated and the optimal jet ratio of the device R (the ratio of the high-energy beam jet to the mainstream flow velocity) was clarified through combined numerical simulations and a generalized model test. The ship's motion response state was subsequently validated when the device was reasonably deployed. The results showed that the reasonable deployment angles of the device were 0°, 15°, and 30°. R = 4 served as the optimal jet ratio. Furthermore, the peak value of turbulence intensity in the Y direction was noticeably smaller than in the other three groups, with a stable change. The coordinate error of the key positions in the numerical simulations and generalized model test of ship motion response was less than 10%, the maximum error of the transverse coordinate of the deflection position was −9.8% and the maximum error of the longitudinal coordinate was −7.0%. The maximum error of the transverse coordinate of the maximum deflection position was −6.8% and the maximum error of the longitudinal coordinate was 3.7%. The numerical simulations and generalized model tests of ship motion response fit well. [ABSTRACT FROM AUTHOR]