Search

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The aggregation and dispersion of raindrops by canopy affect the mass and kinetic energy of raindrops under the forest. A new parameter “raindrop convergence rate” was defined in this paper to describe the raindrop convergence capacity of the forest canopy. By quantifying how many small raindrops outside the forest converge into one large raindrop inside the forest, the canopy’s effect on raindrop convergence was studied under the conditions of rainfall intensity and rainfall. The main research results are as follows: a) The proportion of total rainfall in Robinia pseudoacacin forest is the highest, followed by canopy interception, and the proportion of stem flow is the lowest. b) The contribution rate of small diameter raindrop (＜1 mm) to rainfall intensity inside and outside the forest is always the highest, while that of large diameter raindrop (＞3 mm) is always the lowest. c) The raindrop convergence rate curve shows a unimodal trend under different rainfall intensification conditions, and a bimodal trend under different rainfall conditions. When the rain intensity is 2.20 mm/h, the convergence rate of raindrop is 9, that is, 9 small raindrops outside the forest are transformed into 1 large raindrop inside the forest. It can be seen that the canopy of Robinia pseudoacacin in Beijing mountain area mainly plays an aggregation role in raindrops, and its aggregation capacity presents a unimodal curve with rainfall intensity and a bimodal curve with rainfall. [ABSTRACT FROM AUTHOR]

Based on the Landsat satellite images and social statistical data in 2000 and 2020, this paper quantitatively analyzed the temporal and spatial evolution and comparative advantages of the “production-living-ecological” functions in Liaoning Province by using land transfer matrix, functional values and comparative advantages of the “production-living-ecological” functions, and put forward some policy suggestions. The results show that: the land use of Liaoning Province is mainly woodland, agriculture, rural area and water area, accounting for 42.83%, 41.00%, 5.21% and 3.42% of the total area. The production function is high in the middle and low in the east and west, and the production function value ranges from 0.01 to 0.21. The living function is distributed from east to west, and the living function value is decreased from the plain to the surrounding mountains. There is a significant correlation between ecological function and landform, with ecological function values ranging from 0.01 to 0.65. The central Liaoning Plain and Dalian have comparative advantages in production function. The central Liaoning Plain and Dalian have comparative advantages in living function, and the eastern and western Liaoning have comparative advantages in ecological function. It is suggested to design a policy framework for coordinating the functions of “production-living-ecological”, and improve the mechanism of ecological and environmental protection. [ABSTRACT FROM AUTHOR]

In order to find out the variation law of total dissolved solids (TDS) in groundwater in different buried depth areas, this paper took the People’s Victory Canal Irrigation Area as the research area, and divided into high value area, transition area and low value area according to TDS value, the optimal Copula function was selected by AIC criterion, the optimal Copula function was used to build the joint distribution between groundwater depth and TDS in different regions and analyze the relationship between the two. The results show that there is a strong positive correlation between groundwater depth and TDS in different regions, the optimal edge distribution of groundwater depth and TDS in the high value area is Gamma distribution, the optimal edge distribution of groundwater depth in transition area and low value area is Weibull distribution, and the optimal edge distribution of TDS is Gamma distribution. The optimal joint distribution function of the burial depth of each typical observation well and TDS is the Frank Copula function. According to the joint probability contour, when the groundwater depth and TDS increase, the joint probability value also increases; When the joint probability value is constant, TDS decreases with the increase of groundwater depth and tends to be stable; The joint probability contour can also reflect the probability of TDS under any groundwater depth, and the possible combination between different groundwater depths and TDS under the same probability. [ABSTRACT FROM AUTHOR]

In orderto effectively optimize the allocation of water resources and maximize the overall benefits of the Zhaokou Yellow River Irrigation Area Phase II, this paper established a bi-level multi-objective model for water resources optimization allocation and scheduling modelling. This model employed genetic algorithms to optimize canal water scheduling schemes and the allocation volumes for six water users, including residential livestock, agriculture, secondary industry, tertiary industry, environmental sanitation and greening, as well as river and lake ecosystems under designed frequencies of 50%, 75%,95% in the planning year of 2030. Findings reveal that, at different designed frequencies, the optimal water allocation scheme successfully satisfies the fundamental needs of the diverse water users within the irrigation area. It also ensures adequate water supply for residential livestock, secondary and tertiary industries. Additionally, the agricultural sector maintains a supply-demand ratio exceeding 0.76. Under the different designed frequencies, the proportion of water diverted from the Yellow River by each canal in the irrigation area is 46.61%, 42.28%, and 48.58%, respectively. [ABSTRACT FROM AUTHOR]

The ecological protection and high-quality development of the Yellow River Basin are significant national strategies. The “Yellow River Protection Law of the People’s Republic of China” provides legal guarantees for comprehensive management at the basin level, high-level protection of the Yellow River, high-quality development, and the building of a “Happy River” benefiting the people. The legislative basis of the “Yellow River Protection Law of the People’s Republic of China” includes legislation at the national, local, and basin levels. It addresses the issues of unclear jurisdiction of Yellow River Basin management institutions and the lack of uniformity and coordination among provincial regulations. The paper proposed recommendations for the prompt building of a legal framework system based on the “Yellow River Protection Law of the People’s Republic of China” and the timely promotion and evaluation of the legislation and its implementation. [ABSTRACT FROM AUTHOR]

Most hydraulic engineering works have a wide construction scope and on-site construction supervision is difficult. The supervision of hydraulic engineering construction is more important for the efficient implementation of engineering projects. Based on the data collected through the survey of Ningxia hydraulic projects construction, this paper had proposed and verified the influence factor model on performance of hydraulic project construction supervision. The results show that all the three factors of supervisors' capability, bidding system and information management are significantly correlated with project construction supervision performance. Supervisors' capability has the strongest impact on construction supervision performance, followed with bidding system and information management. The above findings indicate that strengthening the construction of supervision capacity is critical to improve the performance of supervision work, and at the same time, improving bidding system for selecting competent supervisors and enhancing information management for improving supervision efficiency should be emphasized. Specific measures to improve hydraulic project construction supervision include: a) improving bidding system for selecting competent supervisors; b) establishing a supervision performance evaluation system to promote the supervisors' capability; c) setting up construction supervision incentives; d) applying advanced information, digital and smart management tools to project construction supervision. [ABSTRACT FROM AUTHOR]

In order to accurately evaluate the amount of groundwater resources in confined overflow aquifers, it is a key issue to explore a simple and accurate method for calculating hydrogeological parameters. Based on the pumping test data of unsteady flow over-flow confined aquifer in Balizhuang water source exploration project of Qingfeng County, this paper used Aquifer Test software to calculate the hydrogeological parameters of confined aquifer according to the unsteady well flow theory of over-flow confined aquifer, and the calculation results were compared and analyzed by numerical simulation method. The results show that the calculation of hydrogeological parameters by Aquifer Test software is simple and fast, and the calculation results are in line with the actual situation of hydrogeology, which provides a more accurate calculation method for the reasonable selection of hydrogeological parameters of overflow confined aquifer. [ABSTRACT FROM AUTHOR]

In order to facilitate the efficient utilization of water resources and the high-quality development of economy and society in the national central cities of the Yellow River Basin, this paper analyzed the water resources utilization efficiency, annual changes and influencing factors of Zhengzhou and Xi’an, the national central cities of the Yellow River basin, in terms of water resources utilization, social economy and ecological environment, based on the super efficiency SBM model, DEA Malmquist index and Tobit regression model. The results show that: a) In 2005-2020, Zhengzhou and Xi’an have moderate water resources utilization efficiency. In terms of water resources utilization and socio-economic sub-systems, the efficiency of water resources utilization of Zhengzhou is higher than that of Xi’an; In terms of ecological environment, the water resources utilization efficiency of Xi’an is higher than that of Zhengzhou; The comprehensive water resources utilization efficiency of Zhengzhou is higher than that of Xi’an. b) The total factor productivity of water resources utilization in Zhengzhou City is in an overall rising state in three sub-systems, Xi’an City is in an overall rising state in social and economic sub-systems of water resources utilization, and is in a declining state in water resources utilization and ecological environment. c) Economic development level is positively correlated with water resources utilization efficiency. The correlation between industrial structure, scientific and technological innovation level and water resources utilization efficiency is not significant. There is a negative correlation between water resources endowment and water resources utilization efficiency. [ABSTRACT FROM AUTHOR]

In order to scientifically analyze the current situation and development trend of water resources conservation and intensive utilization in irrigation areas, taking the People’s Victory Canal irrigation area in the Yellow River Basin as an example, this paper used the TOPSIS evaluation method combining with Analytic Hierarchy Process (AHP) and entropy method to evaluate the water resources conservation and intensive utilization, which was divided into four subsystems of agricultural water use, domestic water use, ecological water use, and industrial water use. A comprehensive evaluation of water resources conservation and intensive utilization was conducted, and obstacle factors were identified. The results show that the overall level of water resources conservation and intensive utilization in the People’s Victory Canal Irrigation Area is “medium”, and shows an upward trend. The closeness of water resources conservation and intensive utilization in Yuanyang County, Yanjin County, Weihui City, and Xinxiang County is relatively higher. Agricultural water consumption rate, popularization rate of water-saving irrigation equipment, per capita grain yield, and other agricultural water use indicators are the main obstacles to water resources conservation and intensive utilization in the irrigation area. [ABSTRACT FROM AUTHOR]

In order to explore an effective way to improve the coupling and coordination between ecological protection and high-quality development in the Yellow River Basin, build a high-quality development evaluation index system including five dimensions of innovative development, coordinated development, green development, open development and shared development, and an ecological evaluation index system including three dimensions of ecological environment resources, ecological environment carrying capacity and ecological environment management and based on panel data from nine provinces (regions) in the Yellow River Basin from 2002 to 2021, the entropy-weighted TOPSIS method was used to calculate the high-quality development index and ecological protection index. Then it calculated the coupling coordination degree and the decoupling index of the two and analyzed the coupling coordination level, decoupling state and its temporal and spatial changes. The results show that a) from 2002 to 2021, the level of ecological protection and high-quality development in the Yellow River Basin has been improved and the trend of change is steadily improving. However, the issues of uneven high-quality development in the western region lagging behind the eastern region, the larger differences in ecological protection among the provinces (regions) and the fragile ecological environment have not been fundamentally changed. b) The coupling coordination degree between ecological protection and high-quality development in the Yellow River Basin fluctuated significantly before 2010 and the coupling coordination level was basically imbalanced. After 2010, the coupling coordination degree has been steadily improved, and the coupling coordination level is gradually shifted from primary coordination to good coordination and high-quality coordination. However, there are significant differences in the coupling coordination degree and coupling coordination level among different provinces (regions) . c) The decoupling state between ecological protection and high-quality development in the nine provinces (regions) of the Yellow River Basin from 2002 to 2021, in a few years, it is an expansion connection or weak decoupling, and most years experiencing unsatisfactory strong decoupling, strong negative decoupling, weak negative decoupling or declining coupling. At the end of the research period, most provinces (regions) experience a decline in high-quality development level accompanied by a strong negative decoupling state of improved ecological environment. This paper puts forward the path to enhance the coupling coordination between ecological environment protection and high-quality development of strengthening the flow of industrial development factors, accelerating industrial transformation and upgrading, and promoting the development of digital economy. [ABSTRACT FROM AUTHOR]

In order to provide reference for the formulation of relevant policies for the ecological protection and high-quality development of the Yellow River Basin, this paper started from the perspective of the dual coupling of ecological protection and high-quality development in the Yellow River Basin to build separate evaluation indicator systems for development quality and ecological protection. Then, it calculated the development quality index and ecological protection index of each province (autonomous region) in the year 2020 by using entropy method. It built a two-dimensional quadrant model of ecological protection and development quality with the national average development quality index and ecological protection index as the coordinate origin. Based on the distribution of each province (autonomous region) in the two-dimensional quadrants, it determined the coordination status of ecological protection and high-quality development. The results show that there is significant variation in ecological protection and development quality among provinces (autonomous regions) in the Yellow River Basin, with prominent issues of imbalance and inadequacy. Using the national average development quality index and ecological protection index as benchmarks, considering a development quality index higher than the national average as high quality and an ecological protection index higher than the national average as good ecological quality, the coordination status of ecological protection and high-quality development in the various provinces (autonomous regions) of the Yellow River Basin is classified into four types of excellent ecology-high quality, excellent ecology-low quality, low ecology-low quality and low ecology-high quality. The results show that only Sichuan is in a relatively ideal state of excellent ecology-high quality, while the other provinces (autonomous regions) are in the three types of non-coordinated states of excellent ecology-low quality, low ecology-low quality and low ecology-high quality. Finally, it proposes the establishment of a long-term mechanism for the coordinated advancement of ecological protection and high-quality development in the Yellow River Basin, focusing on the six aspects of top-level strategic design, inter-provincial (autonomous regional) collaborative control, public participation, rigid constraints on ecological protection, constraints on rights, responsibilities and interests and ecological compensation. [ABSTRACT FROM AUTHOR]

The stability of the arch dam shoulder is an important element in the analysis of the safety and stability of arch dams. The classical calculation method of arch dam shoulder slip resistance needs to assume the bottom sliding surface of the dam shoulder slider and ignore the influence of the fault and fracture joint group in the rock body of the dam shoulder on its shoulder slip resistance stability. In order to take into account the influence of faults and fracture joint groups to the rock mass, this paper used genetic algorithm to search for the critical sliding surface of the dam shoulder anti-slip based on the time course analysis method and analyzed the change of vibration intensity anywhere on the critical sliding surface of the dam shoulder slider. The slip resistance of the concrete arch dam shoulder was investigated in terms of sensitivity to shear strength parameters and ground vibration. The study result shows that the friction coefficient of the structural surface has less influence to the slip resistance stability of the dam shoulder, while the slip resistance stability performance of the dam shoulder is most sensitive to the cohesive force on the rock bridge, and the influence of cohesive force to the slip resistance stability performance is stronger than that of the friction coefficient, and the influence of ground vibration to the slip resistance stability performance of the arch dam shoulder is weaker. [ABSTRACT FROM AUTHOR]

The stability of high slope of hydropower station is one of the key geological issues that need to be paid attention to in the process of engineering construction. The stability analysis is more complicated due to the influence of structural plane type, occurrence and scale. In this paper, the right bank slope of a large hydropower station was taken as the research object. According to the characteristics and position of the internal structural plane, the possible block combinations of each structural plane were analyzed, and the slope stability was preliminarily judged. According to the specification requirements, the limit equilibrium analysis was calculated through Rocscience software, the strength reduction was further introduced into the discrete element method to verify the calculation results of the limit equilibrium method, and the dangerous sliding surface was given. The results show that the sliding blocks of some sections are slightly thinner, and the slope is in a stable state, but on the whole, reinforcement measures need to be taken. It is suggested that dynamic design should be carried out according to the relevant information of geological conditions and safety monitoring feedback during excavation during construction. [ABSTRACT FROM AUTHOR]

In order to scientifically evaluate the building performance of sponge city and solve the issue that the evaluation method of sponge city performance is too subjective, this paper innovatively attempted to propose a new comprehensive sponge city building performance evaluation method based on data envelopment method and the principle of vector angle cosine. Firstly, the evaluation index system was built from the following six dimensions including water ecology, water environment, water resources, water security, system and implementation, and display degree. Then the weight of each index was obtained by applying the data envelopment method which could weaken the influence of the subjectivity of decision data to the weight of the index. Furthermore, the performance level of sponge city construction was obtained based on the variable of progress between the target to be evaluated and the desired target by utilizing the vector angle cosine method. Meanwhile, sensitivity analysis was conducted to effectively identify which factors were the most susceptible during the performance of sponge city building. Finally, the method was applied to the sponge city building performance evaluation of Hebi City, and the evaluation results were compared with the fuzzy analytic hierarchy process, grey correlation method, analytic hierarchy process and vector included angle cosine method. The results show that the evaluation results of this method are consistent with those of other methods, and the building performance level of Hebi sponge city is level Ⅲ, which belongs to the medium level. However, the relative error of the evaluation results of this method is smaller and more close to the reality and the rationality of the model is proved. [ABSTRACT FROM AUTHOR]

In order to scientifically and reasonably evaluate the carrying capacity of regional groundwater resources, this paper proposed an evaluation method of groundwater resources carrying capacity based on projection pursuit improved TOPSIS. Firstly, it determined the evaluation indexes of groundwater resources carrying capacity of 11 regions, and calculated the weight of each evaluating index by expert consultation and genetic analytic hierarchy process. Secondly, it determined 5 evaluation grade standards of each evaluation index, and then built the evaluation model of groundwater resources carrying capacity based on projection pursuit improved TOPSIS (GRCC-TPP). The GRCC-TPP model was used to evaluate the groundwater resources carrying capacity of five prefecture level cities in northern Henan in 2015. The results show that the carrying capacity of groundwater resources in Jiaozuo City is the best, which is grade Ⅱ (basically loadable); the situation of Hebi, Xinxiang and Puyang cities is grade Ⅲ (critical overload) and Anyang City is the worst, which is grade Ⅳ (overload). The evaluation results are basically consistent with the actual groundwater resources carrying capacity in northern Henan, indicating that GRCC-TPP model has good applicability in the quantitative evaluation of regional groundwater resources carrying capacity. [ABSTRACT FROM AUTHOR]

In order to provide a basis for the policy design of digital economy enabling the building of modern industrial system in the Yellow River Basin, this paper empirically tested the impact mechanism and effect of digital economy on the building of modern industrial system in the Yellow River Basin by taking 57 prefecture-level cities in the Yellow River Basin as sample units, using the panel data from 2011 to 2019 and adopting a two-way fixed effect model of space and time. The results show that the digital economy has a significant promoting effect on the building of modern industrial system in the Yellow River Basin, and technological innovation and human capital are important intermediary transmission factors. The development of digital economy can effectively promote the building of modern industrial systems in the lower reaches of the Yellow River Basin, but its impact on the upper and middle reaches is not significant. The digital economy has a significant positive impact on the building of modern industrial systems in second-tier cities, third-tier cities and fourth-tier cities in the Yellow River Basin, but its impact on first-tier cities and fifth-tier cities is not significant. The promotion effect of digital economy on the building of modern industrial system in the Yellow River Basin has a threshold effect. When the development level of digital economy is higher than the threshold value, its promotion effect on the building of modern industrial system in the Yellow River Basin is significantly enhanced. [ABSTRACT FROM AUTHOR]

Taking the built, under construction and planned hydropower stations in the upper and middle reaches of the Yellow River and their surrounding wind and light resources as the object, based on the output characteristics and complementary characteristics of hydropower, wind power and photoelectric power, and based on the principle that the access of wind power and photoelectric power does not increase: the abandoned water of hydropower, and the abandoned wind and light rate were controlled economically, the research on the integrated configuration and operation of hydropower, wind power and photovoltaic power generation in the main stream of the Yellow River was carried out. Combined with the complementary operation characteristics, it made full use of the regulation capacity of hydropower, improved the utilization efficiency of transmission channel, and coordinated the local consumption and transmission. On the basis of technical feasibility and economic rationality, this paper constructed the hydropower, wind power and photoelectric configuration model and economic analysis model of the main stream of the Yellow River. Through model analysis and calculation, this paper put forward the economically reasonable proportion scheme of hydropower, wind power and photoelectric installation scale, and put forward the development goal and layout of water scenery integration in the main stream of the Yellow Rive r in 2025 and 2035. [ABSTRACT FROM AUTHOR]

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The research object of this paper was a cemented sand gravel dam in the design stage. The foundation overburden at the dam site was sanely pebble soil layer, and the dam body was cemented sand gravel. Exploring its stress deformation law and reasonable shape had guiding significance for the design of similar projects. In the early stage of this paper, the parametric design command flow of ANSYS was used for secondary development. Taking Duncan Zhang classical and modified models as material constitutive models, the finite element calculation of the overall structure was carried out and the law of stress and deformation was analyzed. In the later stage, based on the actual design requirements, from the perspectives of overburden compression and shear resistance, it connected the ANSYS finite element analysis and MATLAB optimization module, and obtained the optimal dam type through optimization design and scheme evaluation, so as to reduce the material consumption (save 11 .3%·) and improve the foundation stress state (remove the shear failure point and reduce the maximum compressive stress by 9.2%) . [ABSTRACT FROM AUTHOR]

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

When evaluating the safety status of hydraulic steel gate in service, it is usually necessary to comprehensively consider the influence of evaluation indexes from many aspects, among which there are qualitative and quantitative indexes, which is an issue of uncertainty and fuzziness. Based on this, this paper combined the intuitionistic fuzzy hierarchy method and cloud model method to evaluate the safety state of the gate. Firstly, this paper built the evaluation structure system of hydraulic steel gate based on the idea of hierarchy method, and then invited experts to evaluate and compare the indicators on the basis of intuitionistic fuzzy theory, established the judgment matrix and comprehensively analyzed the weight of each indicator. To adopt the method of cloud model, combining with engineering example, set up the index of diagnosis of cloud, the diagnosis of synthesis of various cloud chart, finally got the diagnosis cloud gate test result and comparing with state chart, finally it was concluded that the gate security status. Comparing with the actual situation, the results of this method are accurate and intuitive. [ABSTRACT FROM AUTHOR]

Water supply system is an important system for the production and life of urban residents and the development of social ecology. However, with the increasing demand for water resources, the current urban water shortage is becoming increasingly serious. In addition, the overall construction and operation cost of urban water supply system is also increasing. In order to save water resources as much as possible and minimize the cost of water supply on the basis of ensuring the quality, pressure and water demand of various users, this paper proposed a multi-source water supply system scheme and carried out the optimal allocation of water intake, treatment capacity of water plants and distribution capacity of various users. Firstly, the structure of urban water supply system was briefly introduced; secondly, the mathematical model of multi-source water supply system optimal allocation was established, and the working process of the optimization algorithm used in the optimization process was analyzed; finally, the optimal allocation method of multi?source water supply system proposed in this paper was verified with the Zunyi tourism development zone as the research area. The results show that the proposed optimization method can achieve the optimal configuration of multi-source water supply system with less iterations. [ABSTRACT FROM AUTHOR]

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to systematically analyze and accurately quantify the matching characteristics of water resources and economic and social development in prefecture-level cities, typical factors such as total water resources, water consumption, population, GDP and cultivated area were selected in this paper, and a new quantitative research idea that simultaneously applying the calculation methods of matching degree based on Gini coefficient and data sequence was proposed. Taking 10 prefecture-level cities along the Shaying River as examples, this paper quantitatively analyzed the spatial-temporal matching relationship between water resources and economic and social development from 2009 to2018. The results show that the application of the above two methods can comprehensively study the matching issue of the two systems elements from the perspective of the whole time/space and the single city/time. There are some differences in the temporal Gini coefficient among prefecture-level cities, but the matching degree of different elements is basically consistent and the results are all good. Except that the temporal matching degrees of total water resources and GDP, water consumption and GDP present a low-high-low evolution trend, the results of other elements present a fluctuation trend over time. The spatial Gini coefficient varies little on the time scale, while there are significant differences among different matching elements. The spatial matching degree is basically consistent in time and the results of some prefecture level cities are poor, especially in Zhengzhou, Nanyang and Zhumadian cities. [ABSTRACT FROM AUTHOR]

This paper proposed an improved method for automatic extraction of multi-band spectral relationship of narrow and deep rivers in mountains and valleys with high sediment concentration from Landsat 8 OLI images, which overcame the mixed pixel effect of mountain shad ow and exposed bedrock in the downstream section of the reservoir. Taking Jingeun to Dongzhuang Reservoir section in the middle reaches of Jinghe River on the Loess Plateau as an example, it separated the water body and mountain shadow, bare mountain and bedrock beach by considering the characteristics of the multi-band spectral, and then constructed a water body extraction model suitable for narrow and deep rivers with high sediment concentration in valleys. Compared with other water extraction models, the method proposed in this paper can over come the influence of shadow close to river channel and bedrock downstream of reservoir on water extraction, and improve the extraction accuracy of narrow and deep rivers with high sediment concentration in mountain canyon. [ABSTRACT FROM AUTHOR]

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The improvement of saline-alkali soil should be adapted to local conditions by combining protection and utilization. The Yellow River irrigation area in Binzhou, Shandong Province is rich in land resources, but the salinization is serious and the available water resources are few, which have seriously restricted the construction of Beihai economic development zone. Combined with the local actual situation, this paper discussed the feasibility of improving saline-alkali land in Beihai New District by using sediment deposited in the Yellow River irrigation area. According to the existing water system, water source, sediment source and other data, the paper demonstrated the utilization potential of water and sediment resources of the Yellow River, and proposed the layout scheme of the implementation of Xiaokaihe and Bojili joint pipeline sediment transport project and the pipeline sediment transport project of diverting water from the Yellow River to Qingdao. [ABSTRACT FROM AUTHOR]

Inspection and testing is an important part of national quality infrastructure and plays an important basic supporting role in the high-quality development of water conservancy. In order to better play the important role of inspection and testing in serving the high-quality development of water conservancy, this paper studied the current situation of inspection and testing in water conservancy industry, analyzed the contents of inspection and testing served the high-quality development of water conservancy industry from the four aspects of inspection and testing served the sustainable development of environment, the quality improvement of water conservancy projects, the quality improvement of water conservancy products and equipment and inspection and testing standards supported the development of inspection and testing industry. This paper put forward the problems existing in the inspection and testing of water conservancy industry and some suggestions from the four aspects of optimizing the layout of inspection and testing market, improving the level of inspection and testing technology, strengthening the construction of integrity system and strengthening the construction of inspection and testing information platform. [ABSTRACT FROM AUTHOR]

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The quality inspection and assessment is an important part ofa project construction. Traditional construction quality inspection and assessment mainly use manual paper documents for inspection, filling, signing, circulation and archiving. The data is difficult to count in real time and there are problems such as large workload, low efficiency and inconvenient query. The digital technology of engineering quality inspection and assessment was studied by this paper. Through the analysis and research based on standardize workflow, form electronization, BIM lightweight and data fusion and other related information technology methods, it designed a digital evaluation and inspection platform for engineering quality inspection and evaluation. Combining with mobile terminals, it had achieved real-time reporting, circulation and sharing of review data, on-site pictures, videos and other materials, making the review more convenient and efficient, improving work efficiency, realizing the digital and intelligent quality review and improving the quality of engineering works. [ABSTRACT FROM AUTHOR]

Funding scheme research is an important basis for the relevant department’s investment decision of Huangzangsi Dam Project. It is the comprehensive development and utilization project as the main task of ecological water distribution, which belongs to social welfare projects. Based on the benefit analysis of Huangzangsi Dam Project, the paper used different methods to share the cost, calculated the irrigation water price and engineering tariff and analyzed the tolerance capacity of irrigation water price. On this basis, the paper calculated the loan capability of the project. Considering the lending capacity of the project, the tolerance ability of irrigation water price and the possible engineering tariff scheme, the paper recommend the funding scheme and made financial evaluation for project decision-making reference. [ABSTRACT FROM AUTHOR]

The Xiaolangdi Reservoir has been mainly used for sediment trapping and water-sediment regulating in order to reduce sedimentation of the lower Yellow River after operation, which results in lower sediment transport efficiency. At present, a suitable river channel scale of median water with the bankfull discharge capacity of 4 000 m³/s has been formed in the lower Yellow River. Under this riverbed condition, how to maintain the river channel of median water of the lower Yellow River and give full play to the river sediment transport capacity becomes new requirement to the operation of the reservoir. This paper analyzed the sediment transport efficiency at different sediment concentration levels and discharge levels based on the measured data of 306 non-overbank floods in the lower reaches of the Yellow River from 1960 to 2016 and proposed that the downstream river channel had a higher sediment transport efficiency when the large flow with sediment concentration greater than 60 kg/m³, but it was also prone to cause sedimentation in the river channel. The paper further proposed the sediment transport requirement to the operation of the reservoir based on maintaining the river channel of median water of the lower Yellow River. In order to improve the sediment transport capacity of the downstream river, when the bankfull discharge capacity of the downstream river channel was about 4 000 m³/s, the Xiaolangdi Reservoir could discharge large-flow processes with sediment concentration less than 100 kg/m³. When the bankfull discharge capacity of the downstream river channel was greater than 4 500 m³/s, the Xiaolangdi Reservoir could discharge large-flow processes with sediment concentration less than 200 kg/m³. When the bankfull discharge capacity of the downstream river channel was less than 4 000 m³/s in the future, the Xiaolangdi Reservoir would still mainly trap sediment to reinvent the river channel. The calculation results of the mathematical model show that the adjustment of the operation mode of the reservoir can improve the sediment transport capacity of the downstream river, alleviate the sedimentation of the reservoir and the downstream river and maintain the river channel of median water with the bankfull discharge capacity of 4 000 m³/s for a longer period of time. [ABSTRACT FROM AUTHOR]

The changes of water and sediment in the Yellow River, especially judging the trend of the amount of incoming sediment is an important basis for determining the strategy for controlling the Yellow River. The runoff and sediment of the Jialu River Basin in the middle reaches of the Yellow River have been decreased sharply in recent years. Taking the Jialu River Basin as the research object, the paper analyzed the possible amount of incoming sand in extreme rainstorm conditions. The result shows that based on 204 rainfall events in the Jialu River Basin from 1962 to 2017, the flood rainfall-sedimentary double cumulative curve plotted on the measured data points of sediment transport shows significant inflection points in 1972 and 2002. After the inflection point, the amount of sediment transport is significantly reduced under the same rainfall conditions. Then this paper took 1971 as the natural period and 2002 and later as the current stage. The relationship between rainfall over 50mm and sediment yield was analyzed by sub-rainfall fitting method, rainfall erosion method, sub-rainfall time-segment rainfall fitting method and outsourcing line method. The fitting effect was ideal. The amJysis of rainfall by period fitting shows that, during the rainfall, the maximum 1h rainfall, the maximum 2h rainfall minus the maximum 1h rainfall, the maximum 3h rainfall minus the maximum 2h rainfall, the three sub-period rainfalls have a greater impact on the amount of sediment transported by the sub flood. Adopting 4 fitting formulas and extreme torrential rain set by historical measured extreme rainfall combined method, the current calculation of the possible amount of sediment in the Jialu River is between 12 million and 22 million tons. Compared with the natural period, the benefit of sand reduction is 88.7%-94.8%. The maximum possible sediment load of 22 million tons is 42.3% of the measured maximum subsurface flood discharge of 52 million tons. [ABSTRACT FROM AUTHOR]

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)