Search

The impact of radioactivity on the environment and health is very overwhelming, until today these continuous radiations affect local populations by differential cancers, eye diseases, genetic malformations and other rare diseases. Fatal radiation carried by sand, water and poisoned air affects local populations directly or indirectly. The Analysis of spatial phenomena is effective by the use of techniques of geomatics, and that is when the geographical problems are quantitative and qualitative, can be easily applied in identifying and explaining phenomena. In our case how to make knowledge, despite the enormous number of cancer patients, there has been practically no geographical discussion on the aggravating factors linked to radioactive risks, we have not even spatialized radioactive territories in Algeria. The aim of this study is to identify carcinogenic sites by the spatialization of radioactivity due to nuclear tests in Algeria. [ABSTRACT FROM AUTHOR]

In arid and hyper-arid areas, groundwater is a precious and rare resource. The need for water supply has grown over the past few decades as a result of population growth, urbanization, and agricultural endeavors. This research aims to locate groundwater recharge potential zones (GWPZs) using multi-criteria evaluation (MCE) in the Wadi Qena Basin, Eastern Desert of Egypt, which represents one of the most promising valleys on which the government depends for land reclamations and developments. These approaches have been used to integrate and delineate the locations of high groundwater recharge and the potential of the Quaternary aquifer in the Wadi Qena basin. After allocating weight factors to identify features in each case based on infiltration, land use/land cover, slope, geology, topology, soil, drainage density, lineament density, rainfall, flow accumulation, and flow direction, these thematic maps were combined. The results of the GIS modeling led to the division of the area's groundwater recharge potential into five groups, ranging from very high (in the western part) to very low (in the eastern part of the basin). The zones with the best prospects for groundwater exploration turned out to be the alluvial and flood plains, with their thick strata of sand and gravel. The groundwater recharge potential map was validated using data from the field and earlier investigations. The promising recharging areas show high suitability for soil cultivation. The results overall reveal that RS and GIS methodologies offer insightful instruments for more precise assessment, planning, and monitoring of water resources in arid regions and anywhere with similar setups for groundwater prospecting and management. [ABSTRACT FROM AUTHOR]

The North African steppe areas represent a heritage of great economic and ecological importance. These areas, which were once prosperous, are currently experiencing significant degradation and a decrease in productivity due to several factors. The objective of this study was to evaluate the dynamics of the steppe vegetation, identify the responsible factors, and present perspectives for their management and restoration. The methodological approach adopted for the characterization of climatic and socioeconomic conditions and the analysis of vegetation dynamics combined classical geomatics methods with a data mining method by mobilizing several sources and on important temporal horizons. This study was optimized by using the Google Earth Engine platform. Results showed that steppe areas are characterized by their plant richness and great potential for resilience despite their low vegetation cover. The analysis of the dynamics of change has highlighted a regressive trend in steppe vegetation during the study period (1995–2020). This study has been able to highlight the extent of the dynamics of the steppes in the study area during the last 26 years and to identify the human activity as the main trigger for the transformation that steppe areas are currently undergoing. Such results improve our knowledge of these areas and open perspectives for their management. [ABSTRACT FROM AUTHOR]

Small glaciers are one of the best indicators of climatic variations and their short‐term effects. Located in the Spanish Pyrenees, the Maladeta is one of these glaciers. Its systematic observation began in the 1980s, being one of the few Pyrenean glaciers with a tongue‐shaped front. This study presents the evolution of the Maladeta glacial tongue over a decade (2010–2020) through multiple geomatic techniques. Surveys have ranged from Total Stations and Global Navigation Satellite System devices to massive data capture techniques such as Terrestrial Laser Scanners or Unmanned Aerial Vehicles photogrammetry. The aim is to analyze in detail the loss of surface area and thickness of the glacier and its transition from being a glacier with a tongue partially determined by climate to a topoclimatically determined cirque glacier. The results reveal a tongue retreat of over 5 m/yr and area losses of over 0.2 ha/yr, along with ice thickness and volume losses of −1.7 m/yr and over −21 × 103 m3/yr, respectively. If this trend continues, the tongue, and possibly the Maladeta glacier, could disappear by the end of the 2030s. [ABSTRACT FROM AUTHOR]

In the last decades, the introduction of geomatic technologies in the processes of documentation of built environment has revolutionized the field of morphometric documentation. These procedures have undoubtedly helped tangible Cultural Heritage, which in today's society plays an increasingly central role in socio-economic development and the reaffirmation of a country's cultural identity. This research aims to illustrate a management method for Architectural Heritage (AH) using innovative technologies, which allow determining the influence of geographic-environmental conditions on the processes of material and structural degradation of buildings. The case study on which this method was tested is the Facultad de Arte Teatral (FAT) of the Universidad de las Artes in La Habana (Cuba).

Integrating geomatics remote sensing technologies, including 3D terrestrial laser scanning, unmanned aerial vehicles, and ground penetrating radar enables the generation of comprehensive 2D, 2.5D, and 3D documentation for caves and their surroundings. This study focuses on the Altamira Cave's karst system in Spain, resulting in a thorough 3D mapping encompassing both cave interior and exterior topography along with significant discontinuities and karst features in the vicinity. Crucially, GPR mapping confirms that primary vertical discontinuities extend from the near-surface (Upper Layer) to the base of the Polychrome layer housing prehistoric paintings. This discovery signifies direct interconnections helping with fluid exchange between the cave's interior and exterior, a groundbreaking revelation. Such fluid movement has profound implications for site conservation. The utilization of various GPR antennas corroborates the initial hypothesis regarding fluid exchanges and provides concrete proof of their occurrence. This study underscores the indispensability of integrated 3D mapping and GPR techniques for monitoring fluid dynamics within the cave. These tools are vital for safeguarding Altamira, a site of exceptional significance due to its invaluable prehistoric cave paintings. [ABSTRACT FROM AUTHOR]

The mapping of water potential in arid regions holds crucial significance for the sustainable management of water resources in these vulnerable environments. The Anzi sub-basin in Morocco is confronted with water scarcity, presenting a significant challenge. The region's arid climate and limited accessibility to groundwater resources further exacerbate this scarcity, ultimately constraining the region's socioeconomic development, heavily reliant on agriculture. To address this issue, the current study employs mathematical modeling, specifically the frequency ratio (FR) method, and geomatics tools such as remote sensing (RS) and geographic information systems (GIS) to map and assess potential groundwater zones. The study considers multiple factors influencing water availability, including the density of drainage nodes, lineament density, permeability, slope, NDVI, curvature, distance to drainage, topographic wetness index (TWI), sediment transport index (STI), distance to lineament, and rainfall. The investigation identifies 45 wells, of which 70% are used for model application and the remaining 30% for validation. The model application results in the identification of five potential zones: very high, high, moderate, low, and very low, encompassing 3.97%, 10.11%, 23.38%, 35.02%, and 27.53% of the total study area, respectively. Furthermore, the model's validity is confirmed through the ROC (receiver operating characteristic) curve analysis, indicating a reliability value of 82.5% for the FR method in mapping groundwater potential. These findings align with the results obtained from geophysical prospecting in the region. Notably, the locations of high-flow wells generally correspond to moderately to highly conductive anomalies of resistivity, primarily attributed to the presence of quaternary formations, geological faults, and geophysically derived faults. These results are further validated by proton magnetic resonance surveys. [ABSTRACT FROM AUTHOR]

The main objective of the study is to keep up with the current national strategies and activate the role of regional planning to achieve integrated development of the state by focusing on exploiting the Galala region in the Eastern Desert between the axes (Al-Karimat - Zaafarana) and (Sheikh Fadl - Ras Ghareb) to link the last two axes and exploit the area between them Given its capabilities and resources that qualify it to be new development poles and create opportunities for this region to put it in the balance of competition by creating new outlets for it on the Red Sea coast and ports by achieving integration with the axis (Zafarana - Ain Sukhna) in order to get out of the dilapidated delta and the narrow strip valley to benefit from that areas to achieve balance at all levels and fields, hoping to come out of this study with solutions that help bring about a process of emptying the population and redistributing it and exploiting the Egyptian outback and remote areas and establishing urban communities, economic centers and logistical areas and stimulating trade movement by promoting human settlement and reducing immigration, and choosing places to settle industries Which provides the national economy with the largest return, and the discovery and exploitation of natural resources in The best conditions for achieving the main goal of the planning process, which is economic integration between the region and the state. [ABSTRACT FROM AUTHOR]

This work describes a procedure for building a high-quality 3D model of a rocky pinnacle in the Dolomites, Italy, using Structure from Motion (SfM) techniques. The pinnacle, known as "Campanile di Val Montanaia", is challenging to survey due to its high elevation and sub-vertical cliffs. The construction of the 3D model is the first step in a multi-disciplinary approach to characterize the rock mass and understand its behavior and evolution. This paper discusses the surveying operations, which involved climbing the pinnacle to collect Ground Control Points (GCPs) and using a UAV to capture aerial imagery. The photographs were processed using SfM software to generate point clouds, mesh, and texture, which were then used for rock mass discontinuity mapping. The study compares models of different qualities and point densities to determine the optimal trade-off between processing time and accuracy in terms of discontinuity mapping. The results show that higher quality models allow for more detailed mapping of discontinuities, with some drawbacks due to noise in the case of the densest solution (e.g., increase in frequency of outliers across the point cloud). These pros and cons are also discussed in relation to the computational cost necessary to build the models. The study also examines the limitations and challenges of performing discontinuity mapping in the different models, including subjectivity in interpretation. A further element of interest is the publication of a high-quality 3D georeferenced model of the "Campanile di Val Montanaia" to be used for several potential further applications, such as stability analyses and numerical modeling. [ABSTRACT FROM AUTHOR]

The aim of this research is the identification of geomatics techniques and methods capable of representing historic centres in a rapid, detailed and accurate manner. Indeed, historic centres are a cultural heritage asset to be preserved, protected and conserved for future generations, taking into account the history of a community. The paper describes a geomatics methodology applied to the case study of Capitignano (Italy), one of the municipalities that was affected by the 2009 earthquake that involved numerous historic centres causing extensive damage, not only in terms of human lives but also to the cultural heritage. The integration of geomatics techniques made it possible to obtain a georeferenced point cloud that is particularly useful for the description of buildings in historic centres, both at the urban scale and at the scale of individual artefacts. In addition, it was also possible to produce orthophotos with a high geometric resolution that made it possible to identify lesions in structures quickly and accurately. [ABSTRACT FROM AUTHOR]

Remote sensing is a geomatic tool that has been used to determine soil moisture, a very important physical property in studies related to agricultural production. Particularly, the Vertisol present distinctive characteristics to other groupings of soils in Cuba in relation to water retention and the change of their properties. The objective of the research was validating the use of spectral moisture indexes through Landsat 8 OLI/TIRS images in a Vertisol. An area under natural grass, sugarcane and secondary forest of the Provincial Sugarcane Research Station in Guaro, Holguín was chosen. Three georeferenced random sampling points were established for each land use up to a depth of 30.0 cm, for the determination of gravimetric moisture, which was related by means of linear regression analysis with the spectral indexes of moisture and the calculation of parameters for validation. The use of remote sensing showed in the thematic maps obtained from the estimation of moisture with the different spectral indexes, the presence of homogeneous zones and their spatial variability in the moisture state of the Vertisol under the three land uses. ENDWI, MSI and EMSI indexes indicated a better estimation in the statistics used for the validation of the values obtained by remote sensing and in situ sampling of moisture, according to research related to the subject. [ABSTRACT FROM AUTHOR]

Türkiye has a wealth of foundations and their properties, assets managed by the General Directorate of Foundations (GDF) through its geomatics engineers. This article aims to identify the misconceptions of senior undergraduate geomatics engineering students (sample group) about the relationship between foundations and land ownership registered as cultural heritage. It will develop and implement materials to eliminate these misconceptions and evaluate their effectiveness. This study consists of a preliminary, a pilot and the main application. The data collection instruments are an open-ended questionnaire, a semi-structured interview form and conceptual understanding tests. As a result of the analysis of the pre-study and the pilot study, guidance materials on information deficits and misunderstandings in the application of Article 30 of the Law on Foundations were developed. In the analysis of the quantitative data, the Wilcoxon signed-rank test is used, a non-parametric analysis methods. In the light of the data obtained from the study, it is recommended that materials be developed in other areas of land management to investigate their effectiveness. [ABSTRACT FROM AUTHOR]

This contribution focuses on a comparison of modern geomatics technologies for the derivation of growth parameters in forest management. The present text summarizes the results of our measurements over the last five years. As a case project, a mountain spruce forest with planned forest logging was selected. In this locality, terrestrial laser scanning (TLS) and terrestrial and drone close-range photogrammetry were experimentally used, as was the use of PLS mobile technology (personal laser scanning) and ALS (aerial laser scanning). Results from the data joining, usability, and economics of all technologies for forest management and ecology were discussed. ALS is expensive for small areas and the results were not suitable for a detailed parameter derivation. The RPAS (remotely piloted aircraft systems, known as "drones") method of data acquisition combines the benefits of close-range and aerial photogrammetry. If the approximate height and number of the trees are known, one can approximately calculate the extracted cubage of wood mass before forest logging. The use of conventional terrestrial close-range photogrammetry and TLS proved to be inappropriate and practically unusable in our case, and also in standard forestry practice after consultation with forestry workers. On the other hand, the use of PLS is very simple and allows you to quickly define ordered parameters and further calculate, for example, the cubic volume of wood stockpiles. The results from our research into forestry show that drones can be used to estimate quantities (wood cubature) and inspect the health status of spruce forests, However, PLS seems, nowadays, to be the best solution in forest management for deriving forest parameters. Our results are mainly oriented to practice and in no way diminish the general research in this area. [ABSTRACT FROM AUTHOR]

Between August and November 2016, three major earthquake events occurred in Central Italy. The first event, with M6.1, took place on 24 August 2016, the second (M5.9) on 26 October, and the third (M6.5) on 30 October 2016. As part of the Italy-US GEER team investigation, we recorded the amplitude and character of offset on the Mount Vettore Fault Zone (MVFZ) using traditional manual field recording and mapping techniques and advanced state-of-the-art geomatics methods of LIDAR and Structure From Motion.Extensive field surveys by INGV geologists and the GEER team were performed on the flanks of Mt Vettore after the 24 August and 30 October events, and a limited survey was done between the two October events by INGV. These surveys indicated normal offset on several strands of the MVFZ, along the upper flanks of Mount Vettore and on the Piano Grande basin floor. The primary trace of the fault had measurable offset up to 215 cm in the northern section of the fault (42.810N-42.818N), and lesser offsets in the southern and central portion of the fault (42.796N-42.810N). In tandem with the traditional field recording of offset, we collected TLS-LIDAR at several locations and flew approximately 5 km of the fault with unmanned aerial systems (UAS) to image the offsets. Lidar and Structure-from-Motion point cloud models were merged to construct a virtual topographic model of the fault. Comparison between the virtual offsets in the point cloud data and the field measurements at the same location found close agreement within 20% of the measured field values. The results indicate that LIDAR and UAS-based methods for collecting and analyzing topographic fault offsets are accurate and potentially greatly improve the magnitude of fault offset data sets from events with measurable surface rupture.

This paper highlights the fundamental role of integrating different geomatics and geophysical imaging technologies in understanding and preserving cultural heritage, with a focus on the Pavilion of Charles V in Seville (Spain). Using a terrestrial laser scanner, global navigation satellite system, and ground-penetrating radar, we constructed a building information modelling (BIM) system to derive comprehensive decision-making models to preserve this historical asset. These models enable the generation of virtual reconstructions, encompassing not only the building but also its subsurface, distributable as augmented reality or virtual reality online. By leveraging these technologies, the research investigates complex details of the pavilion, capturing its current structure and revealing insights into past soil compositions and potential subsurface structures. This detailed analysis empowers stakeholders to make informed decisions about conservation and management. Furthermore, transparent data sharing fosters collaboration, advancing collective understanding and practices in heritage preservation.

Mount Meager is a deeply eroded quaternary volcanic complex located in southwestern British Columbia (BC) and is known for its frequent large landslides. In 2010, the south face of Mount Meager collapsed, generating a long-runout debris avalanche that was one of the largest landslides (50 × 106 m3) in Canadian history. Over the past 14 years, the landslide deposit has been reworked by stream action, delivering large amounts of sediment to Lillooet River, just downstream. In this study, we investigate 10 years of geomorphic evolution of the landslide deposit using orthophotos and digital elevation models (DEMs) generated using Structure from Motion (SfM) photogrammetry on aerial photographs acquired during unmanned aerial vehicle (UAV) and Global Navigation Satellite System (GNSS) surveys. The SfM products were used to produce a series of precise maps that highlight the geomorphological changes along the lower Meager Creek within the runout area of the landslide. Comparison of DEMs produced from 2010, 2012, 2015, and 2019 imagery allowed us to calculate deposit volume changes related to erosion, transport, and redeposition of landslide material. We estimate that about 1.1 × 106 m3 of sediment was eroded from the landslide deposit over the period 2015–2019. About 5.2 × 105 m3 of that sediment was redeposited inside the study area. About 5.8 × 105 m3 of sediment, mainly sand, silt, and clay, were exported from the study area and are being carried by Lillooet River towards Pemberton, 40 km from Mount Meager, and farther downstream. These remobilized sediments likely reduce the Lillooet River channel capacity and thus increase flood hazards to the communities of Pemberton and Mount Currie. Our study indicates a landslide persistence in the landscape, with an estimated 47-year half-life decay, suggesting that higher flood hazard conditions related to increased sediment supply may last longer than previously estimated. This study shows the value of using SfM in tandem with historic aerial photographs, UAV photos, and high-resolution satellite imagery for determining sediment budgets in fluvial systems.

In this study, the course towards determining the homogeneous three-dimensional (3D) coordinates of the newly established active Continuously Operating Reference Station (CORS), based on ITRF2014 in Ghana, is revealed. The aim is to address coordinate inconsistencies and inhomogeneity in the published positions of the new active CORS in Ghana. In order to attain homogeneity, the coordinates of two primary control points, GCS 305 and GCS 306, were obtained using AUSPOS online services via email. These were subsequently used as reference stations to compute the position of the LISAG_KUMASI CORS. Adjustments to the position coordinates were performed using Topcon Tools v8.2.3 software at a 1mm standard deviation. The adjusted coordinates of LISAG_KUMASI were used as the reference points to compute the positions of the LiSAGNet CORS in differential mode by using 24 hour data for 11 consecutive days. The GPS data covered DoY 284 to DoY 295 in 2021. The final positions of the CORS, computed by this approach, indicate some differences from the officially published coordinates of the same CORS, confirming the suspicion of inhomogeneity in the source coordinates used in determining the coordinates of the local CORS. Furthermore, a test network, consisting of five COR stations, was designed and used to address the coordinate inconsistencies in the officially published coordinates. Using the officially published coordinates as reference inputs, the ROVER I station was fixed by three different CORSs, thus resulting in average coordinate variabilities of 2.78m and 0.80m in the northing (N) and easting (E) directions, respectively. Through substitution, the coordinates computed in this study as reference inputs, namely, the ROVER I station, were fixed by the same three CORSs, thus resulting in a coordinate variability of 0.002m and 0.006m in the northing (N) and easting (E) directions, respectively. The analysis revealed inconsistencies and inhomogeneity in terms of the officially published coordinates. It is, therefore, recommended that the officially published coordinates of the CORS be replaced by the adjusted homogeneous and consistent values determined through the approach adopted in this study. [ABSTRACT FROM AUTHOR]

This paper attempts to define a name for an area of science and technology that encompasses the acquisition, processing and application of spatial data in the mining industry. A comparative study of the evolution of spatial data exchange methods between Geographic Information Systems (GISs) and General Mining Planning (GMP) software is carried out to define the problem and name it. Subsequent modifications of the acronym GIS towards the specialisation of its application in mining are then reviewed. This is followed by the identification of three terminological postulates designed to formulate constraints and rules for the creation of a new definition. The subsequent analysis identifies the nomenclatural basis of the research area of geomatics and determines its applicability in the context of mining. The results of the research made it possible to formulate a new definition of "mining geomatics". The final section of the article presents an initial proposal for an inventory of the basic concepts of mining geomatics in the form of a Body of Knowledge for mining geomatics. [ABSTRACT FROM AUTHOR]

The aim of the project is to create a knowledge base as a tool for tracking all activities in the whole life cycle of buildings. As several EU directives address the sustainability, resilience, and energy efficiency of the building stock, it is mandatory to provide a market that allows the different actors to share their offers, including quality certificates and credentials, as well as to record and track all information, activities, and changes, and to use knowledge to improve sustainability. Novel DBL-based applications will be tested in pilot projects focusing on historical buildings in critical condition and on different building classes. The project aims to increase the smartness and sustainability of the EU building stock, create new markets, and generate new value. [ABSTRACT FROM AUTHOR]

A prominent monument in DKI Jakarta is the Monument Nasional (abbreviated as Monas). This moniker serves as both a symbol for the city of Jakarta and a representation of the people of Jakarta and Indonesia. Apart from being a monument, Monas also has a history of the Indonesian nation. In this study, 3D models are designed to display visualizations of Monas and surroundings in 3D form with the aim of helping tourists who want to visit Monas in preparing and increasing their understanding of the tourism in Monas. This study was conducted with the help of CityEngine software that created the 3D models of Monas implemented and displayed on a website with a web scene format. Using image-based 3D modelling, the main geomatics techniques is photogrammetry, it allows for new methods to create virtual 3D. To do this, various components including route visualizations must collaborate. To do this work we have a framework that leverages the technology and data sources already available to reduce the time and work required for prospective 3D applications. With the existence of a Monas 3D visualization that can be accessed through web browser, it expected that it will make tourists not complicated to obtain various tourism information and increase the tourism in Jakarta. [ABSTRACT FROM AUTHOR]

Various image-based approaches are currently available for 3 Dimensional (3D) modelling. Among them, two main geomatics techniques are photogrammetry and laser scanning. Owing to the limited availability of photographs to the general populace, the employment of satellite and aerial photogrammetry is rather intricate. In light of Jakarta's absence of a comprehensive three-dimensional portrayal, there is an impetus to generate accurate, precise, and detailed tri-dimensional visualizations of a particular sector within Jakarta, specifically Johar Baru. This endeavor shall be undertaken through a technique termed LoD, with ArcGIS and CityEngine serving as the fundamental instruments for this initiative. To do this, we provided a framework that leverages existing technologies and data sources to reduce the time and work needed for prospective 3D indoor routing applications. Our indoor and building 3D models were created using the CityEngine procedural modelling approach from CAD files and building footprints. This work does not address data delivery or administration; it primarily focuses on 3D visualization. Cadastral, visualization, and non-functional requirements are the three main areas of 3D visualization requirements against which CityEngine was assessed. A case study corresponding to a real issue that has already been recognized in Portugal is used to evaluate the problem. The results are encouraging. The CityEngine won't be the best choice for all users because of the steep learning curve. Using CityEngine, we can show and design a 3D reality in Johar Baru. [ABSTRACT FROM AUTHOR]

Rockfall constitutes a major threat to the safety and sustainability of transport corridors bordered by rocky cliffs. This research introduces a new approach to rockfall susceptibility modeling for the identification of potential rockfall source zones. This is achieved by developing a data-driven model to assess the local slope morphological attributes with respect to the rock slope evolution processes. The ability to address "where" a rockfall is more likely to occur via the analysis of historical event inventories with respect to terrain attributes and to define the probability of a given area producing a rockfall is a critical advance toward effective transport corridor management. The availability of high-quality digital volumetric change detection products permits new developments in rockfall assessment and prediction. We explore the potential of simulating the conceptualization of slope-scale rockfall susceptibility modeling using computer power and artificial intelligence (AI). We employ advanced 3D computer vision algorithms for analyzing point clouds to interpret high-resolution digital observations capturing the rock slope evolution via long-term, LiDAR-based 3D differencing. The approach has been developed and tested on data from three rock slopes: two in Canada and one in the UK. The results indicate clear potential for AI advances to develop local susceptibility indicators from local geometry and learning from recent rockfall activity. The resultant models produce slope-wide rockfall susceptibility maps in high resolution, producing up to 75% agreement with validated occurrences. [ABSTRACT FROM AUTHOR]

Groundwater is the major source of drinking water in rural as well as urban areas in India and over 94% of the drinking water demand is met by groundwater. The current study aims to evaluate the availability of safe groundwater for drinking and its seasonal variations in quality during pre-and post-monsoon seasons in the Chengam Taluk of Thiruvannamali district, Tamil Nadu, India. With the aid of BIS2012 and WHO2004 edition, six water quality parameters such as pH, Ca, Cl, EC, Mg and TDS have been taken to evaluate the groundwater quality status of the Taluk. The samples were collected from 7 locations and their physicochemical parameters, such as pH, TDS and EC were measured in situ using the portable kit and Ca, Mg, and Cl, were analyzed in the laboratory. For the preparation of the spatial distribution map of low to high groundwater-contaminated regions, GIS-based spatial interpolation with inverse distance weighting and MCDA (weightage overlay) methods have been used. According to the study results, the concentrations of chemical parameters in the groundwater are more in the central and northern parts of the Taluk compared to the south and south-eastern part. Groundwater quality is in its worst condition (due to over-exploitation, unplanned agricultural and industrial development, unhygienic sewerage with improper methods of toilet waste disposal, etc.) during post-monsoon seasons compared to pre-monsoon for almost all three decades. After evaluating the data, it is concluded that 63% of the sample locations have poor-quality of groundwater which is only suitable for irrigation but not suitable for drinking. There is an instant need to take an ameliorative step to install water purification systems and takes necessary measures for wastewater treatment and improve the groundwater quality of the region. [ABSTRACT FROM AUTHOR]

Wadi Abu Daraj is located on the eastern edge of El-Galala Plateau on the western coast of the Gulf of Suez. Recently, it has witnessed manifestations of large-scale human change, which appeared in the form of building roads as well as urban and tourist facilities. Work still continues to modify the topography of the wadi in preparation for establishing many engineering facilities. The research aims to assess the relationship between physical determinants and hazards, and human uses through geomatics applications, particularly the assessment of methods of protection from the hazards of slopes and flash floods so as to identify the extent of their effectiveness in regard to engineering facilities and sustainable development projects, and they turned out to be convenient to a large extent for the places and degrees of danger. However, they need to be periodically purified and maintained, particularly the methods of protection from the hazards of flash floods. يقع وادي أبودرج بالحافة الشرقية لهضبة الجلالة البحرية على الساحل الغربي لخليج السويس، وقد شهد في الفترة الأخيرة مظاهر من التغيير من قبل الإنسان واسع النطاق، والذي ظهر في صورة إقامة طرق ومنشآت عمرانية وسياحية، ومازال العمل مستمر في تعديل طبوغرافية الوادي تمهيداً لإنشاء العديد من المنشآت الهندسية. ويهدف البحث إلى تقييم العلاقة بين المحددات والأخطار الطبيعية والاستخدامات البشرية وذلك عن طريق تطبيقات الجيوماتيكس، وخاصة تقييم وسائل الحماية من أخطار المنحدرات والسيول للتعرف على مدى فعاليتها بالنسبة للمنشآت الهندسية ومشروعات التنمية المستدامة، والتي تبين أنها تتناسب إلى حدٍ كبير مع مواضع ودرجات الخطورة، ولكنها تحتاج إلى تطهير وصيانة بصفة دورية وخاصة وسائل الحماية من أخطار السيول.

The research aims to be an attempt by the researchers to apply improving the model of the digital rise, thus opening the way for researchers who are interested in developing and expanding this idea in the future. The development of the improved digital elevation model within the boundaries of Al-Tharthar Lake its elevation levels means the unimproved digital elevation model within the lake boundaries of Mozaic topographic maps, in order to avoid the limitations of the unimproved digital elevation model that shows the entire lake at a level of 44 meters above sea level, so the improved digital elevation model shows its morphological, hydrological, topographic and topographic properties within the lake's various elevations within the lake's various elevations within the boundaries of the lake.These proposed steps in the research have proven to be efficient in improving digital elevation models, and the improved digital elevation model has proven to be highly effective in giving a high-level geo-reality perception of the lake greater credibility than it does: the unimproved digital elevation model as well as the old topographic maps. One of the recommendations of the research, recommends the Ministry of Water Resources and General directorate of Survey do accurate field survey principally hydrographic survey for lakes and rivers of the country through the marine area devices which are the best way to represent the topography of the lake with very high accuracy on two levels: horizontal topographic morphometric, vertical interval and elevation levels from both local and national geodesic reference. Consequently, the possibility of updating topographic maps which belong to 20th century

Abstract The constant development of geomatics tools has driven the opening of their applications to multiple disciplines, including archaeology. The possibility of performing a 3D reconstruction of archaeological remains as well as a semantic classification of the 3D surface facilitates not only a better knowledge of the historical heritage but also an essential aid to the planning and development of restoration and preservation projects of this legacy. Different data exploitation strategies are needed to take advantage of the geospatial data provided by geomatics tools. In this paper, we have studied the current state of conservation of a medieval tower, Torre Benzalá in Jaén, southern Spain. The interesting thing about this study is that very high resolution RGB images, taken by a drone, have been used in order to show the current degree of deterioration of the tower, providing accurate and precise documentation of the current state. Thus, a highly detailed 3D reconstruction of the tower has been carried out. A dense point cloud was generated to obtain a digital elevation model (DEM) to identify and quantify the most critically deteriorated areas. The results are useful for the development of an architectural maintenance and restoration project to preserve this archaeological legacy.