Abstract:The use of remote sensing technology to invert soil moisture data plays an important role in regional drought monitoring.This study utilized Landsat 8 remote sensing image data to construct the feature space of surface temperature(TS)and normalized difference vegetation index(INDV)in Liaocheng,and validated the inversion model using field measured soil moisture data.Research has found that the ITVD obtained from remote sensing image inversion is significantly correlated with the measured soil moisture content in the field(α=0.05).The highest correlation was found between ITVD and soil moisture from 10 to 20 cm(R2=0.576).From October 2020 to April 2021,Liaocheng experienced varying degrees of drought,with a drought area of 64.34%in April 2021.The monitoring results are highly consistent with the actual drought situation in Liaocheng.In summary,ITVD can be used for drought monitoring in Liaocheng.

Abstract:To study the leakage and failure mechanism of the core dam of Shangdian Reservoir,the Johansen mathematical thermal conductivity model was introduced,and the influence of the geometric and physical characteristics of the core wall on the flow heat transfer of the core dam was studied based on the COMSOL numerical calculation platform.Research has shown that the permeability coefficient of the core wall will change the head value and infiltration line of the core wall dam,especially the stable period of the infiltration line will be affected.In contrast,the permeability coefficient of the core wall has a higher impact on the single width seepage volume of the dangerous area than the total single width seepage volume of the core wall.As the permeability coefficient of the core wall increases,the temporal changes in the temperature field of the core wall dam will not be affected,but will only alter the temperature distribution level of the core wall dam.The inclination of the core wall has a relatively small impact on the water head value of the core wall dam,but it will change the balance of the seepage line of the dam body.At the same time,the inclination of the core wall has less effect on the single width seepage flow of the dangerous area than the total single width seepage flow of the core wall.The inclination of the core wall will change the temporal trend of the temperature field of the core wall dam and shorten the stable period of the temperature field of the core wall dam.The research conclusion has certain reference significance for the coupling study of seepage field and temperature field of reservoir core wall dam,as well as the exploration of leakage failure mechanism.

Abstract:Under the influence of climate change and urbanization,river regulation has become extremely crucial,especially in the densely populated Lixiahe Area.The advancement of surveying and mapping technology has provided important support for river regulation.Due to the complexity of the river channels in this area and the influence of various factors,advanced surveying and mapping technologies are urgently needed.These technologies can improve planning accuracy and efficiency,help understand key river information,and be used for monitoring and evaluation.This paper will analyze the application of surveying and mapping technology in river regulation,evaluate its effectiveness,and propose optimization strategies.Through case analysis and data model evaluation,it will verify the effectiveness of the technology and provide reference for improving the efficiency and quality of similar river regulation projects.

Abstract:In cold rural areas,affected by factors such as cold climates,substantial thickness of frozen soil layers,and large fluctuations in sewage volume,sewage pipelines are prone to freezing and clogging.This phenomenon severely restricts the normal operation of sewage discharge systems and affects the quality of the rural living environment.Taking the rural areas in the cold region of Miyun District,Beijing as a typical representative,based on a systematic analysis of the causes of pipeline freezing and clogging,corresponding improvement countermeasures were proposed to address issues such as insufficient consideration of local frozen soil thickness during the design phase,poor venting at discharge nodes leading to freezing,inadequate insulation measures,and insufficient construction quality control.These include rationally determining pipe burial depth,selecting appropriate pipe materials and structures,configuring efficient and reliable insulation layers,improving auxiliary anti-freezing facilities,and strengthening winter inspection,dredging maintenance,and emergency response.The results provide a reference for the planning,design,operation and maintenance of sewage projects in cold rural areas.

Abstract:With the acceleration of urbanization,the water ecological pressure in the Chaohu Lake Basin is increasing,and scientific and efficient monitoring and governance are urgently needed.Remote sensing technology has become an important technical means for land use research due to its wide coverage,high update frequency,and relatively low cost.Taking Chaohu Lake as the research area,based on the 16 m multispectral images of HJ-2A/B satellite for environmental disaster reduction,three land use classification methods were systematically compared:band analysis(single band,INDW,IRSW,INDV),unsupervised classification(cluster analysis),and supervised classification(random forest method).By constructing a classification system for water bodies,vegetation,buildings,cultivated land,and unused land,the accuracy of the classification results is evaluated using confusion matrix and K coefficient.The results show that the band threshold method is easy to operate,but it is greatly affected by subjective threshold settings and has limited ability to extract land cover information.Unsupervised classification method can effectively extract land cover types with obvious spectral features,but its classification performance for land cover with insignificant feature differences is poor.Supervised classification method can fully utilize prior sample information and multidimensional spectral features,accurately identify various types of land use,and effectively reduce the misjudgment rate.At a resolution scale of 16m,supervised classification is the optimal solution for extracting land use information in the Chaohu Lake area.The research results can provide current and reliable data support for the integrated management of"mountains,waters,forests,fields,lakes,and grasslands"in Chaohu Lake,as well as the establishment of national spatial control and water ecological compensation mechanisms.

Abstract:Budget performance management can effectively improve the efficiency of financial fund utilization and ensure the smooth implementation of engineering projects.During the project budget application stage,a performance target table must be prepared,performance monitoring and analysis of execution deviations must be conducted during the budget execution process,and unit performance self-evaluation must be conducted after the project is completed.Performance management work runs through the entire process of the project.Therefore,it is particularly important to set performance goals reasonably and use performance self-evaluation results reasonably.The implementation and effectiveness analysis of budget performance management in water conservancy engineering operation and maintenance projects have practical significance and can provide reference and guidance for similar work.

Abstract:The issue of property ownership of rural collective reservoirs is related to the safety and efficiency of reservoir operation.Throughout the years,the property rights system of rural collective reservoirs has been plagued by issues such as the virtualization of property rights entities,unclear responsibilities and rights,and chaotic management.Water rights reform is the core of the current rural water conservancy reform,with the aim of establishing a modern water rights system.It will also force people to clarify ownership and responsibilities for rural collective reservoirs,activate reservoir resources,and improve water resource utilization efficiency and safety through clarifying property rights,activating values,strengthening management,optimizing allocation,and other means.There are still some challenges and difficulties in water rights reform in reality,which require coordinated planning and multi-party cooperation to better promote water rights reform and enable rural collective reservoirs to exert economic and social benefits.

Abstract:This article is based on a certain asphalt concrete core wall dam reservoir project in Xinjiang.Considering the nonlinear characteristics of the dam filling materials,the finite element method is used to simulate two different situations of the reservoir dam construction completion period and the water storage period.The stress and deformation characteristics of the asphalt concrete core wall dam are calculated and analyzed.The results show that the overall settlement of the dam body during the construction period is 0.39%,which meets the requirements of the specifications.The internal stress level of the dam body and foundation is not high,and there is no overall shear failure stress condition.The core wall is under compressive stress,and hydraulic splitting will not occur.The overall safety and reliability of the dam can provide reference for the design of asphalt concrete core wall dam reservoir projects of the same level.

Abstract:The water conservancy projects managed by the Tuancheng Lake Management Office are diverse and scattered,which is difficult to manage.However,the construction of standardized management for water conservancy projects started early and has been carried out for many years,with significant results.A standardized management system has been gradually formed.This article combines years of standardized management construction practice,summarizes the experience and shortcomings in institutional system construction,engineering safety management,engineering operation management,information management,etc.,and provides suggestions and reflections on management system construction,organizational support,personnel training,information construction,etc.,for other water system management units to refer to and learn from,and to promote the construction of standardized management of water conservancy project operation in Beijing and even the whole country.

Abstract:Using the Lizheng Geotechnical Software and the simplified Bishop Method,a stability analysis was conducted on the excavated soil slope of the warping dam spillway.According to different layout schemes,it was found that the excavation depth has a direct impact on the anti slip stability coefficient of the slope.After adjusting the engineering layout plan to reduce the excavation depth,the anti slip stability coefficient of the spillway excavated slope under various working conditions meets the specification requirements,the slope body is stable,and the slope protection design meets the engineering safety requirements.Through the case study of a warping dam project in a county of Yuncheng,Shanxi Province,this paper demonstrates the impact of reducing slope excavation depth on the anti slip stability coefficient,providing reference for the stability analysis of similar engineering slopes.

Abstract:Liaoning Province has formulated and issued local standards for water use quotas,and has achieved great results in water saving work.However,the method for formulating industrial water quotas is still relatively simple.On the basis of analyzing the current situation of water quotas in Liaoning Province,this paper collected and organized local standards for industrial water quotas in 31 provinces(autonomous regions,municipalities directly under the central government),and established a database of industrial water quota standards;Preliminary calculations were conducted on reasonable data within the sample using the reference revision method,bubble sorting method,and secondary average method.Comprehensive analysis was conducted according to the Analytic Hierarchy Process and expert opinions.The industrial water quotas based on the characteristics of Liaoning Province's industrial water usage level and other factors were formulated.

Abstract:The issue of dam seepage is crucial for the safe operation of reservoirs.Taking the Zhongzhuang Reservoir in Ningxia as an example,this paper comprehensively analyzes the causes of seepage at the end of the downstream seepage cut-off trench at dam stake number 0+780 through on-site inspection,analysis of safety monitoring data,and two-dimensional finite element numerical simulation.Combined with the numerical simulation of the dam body infiltration line and single width seepage flow results,the seepage safety of the Zhongzhuang Reservoir dam operation was determined.This paper provided a scientific basis for the seepage safety assessment of the Zhongzhuang Reservoir dam,and reference for the seepage safety assessment of similar small and medium-sized earth rock dam reservoir projects in China.

Abstract:With rapid urban development and the combined effects of various factors,urban river flood control faces new challenges.To further explore the flood control situation and countermeasures for small and medium-sized urban rivers,the current status of flood control work for Xituchenggou in the North Canal system of the Haihe River Basin was systematically reviewed.Addressing its characteristics of being an artificial channel,small flood discharge capacity,and weak links in the flood control system,corresponding countermeasures were proposed.These include restoring river functions,improving the comprehensive quality of management personnel,perfecting supporting equipment and facilities alongside intelligent management systems,implementing pre-discharge flood measures,and carrying out post-rain decontamination to maintain appropriate water levels.These measures aim to balance flood control safety with the water ecological landscape and meet the needs of the capital's water culture construction.The proposed countermeasures provide references for future flood control work in small and medium-sized urban rivers.

Abstract:The Zhanghe River,an important river in the Zhangwei South Canal system of the Haihe River Basin,originates from the Shanxi Plateau and flows through Shanxi,Henan,and Hebei provinces,converging with the Wei River at Xuwancang to form the Wei Canal.This article takes the mainstream of the Zhanghe River as the research object,reviews the previous management of the mainstream of the Zhanghe River,and conducts a retrospective evaluation of the river flow,ecological water discharge satisfaction,water environment quality,terrestrial ecological environment,and aquatic ecological environment of the mainstream of the Zhanghe River.The results show that due to the interception and storage of Yuecheng Reservoir,the mainstream of Zhanghe River often experiences flow interruption,the ecological water discharge of the river is not satisfactory,the aquatic organisms are scarce,and coupled with illegal sand mining in history,the ecological environment of the river is poor.Based on the main ecological and environmental issues existing in the mainstream of the Zhanghe River,suggestions for subsequent protection and management have been put forward.

Abstract:Irrigation areas are important core production areas for grain and high-quality agricultural products in China,and are key infrastructure for ensuring national food security.They not only play an important role in promoting agricultural economic development and rural revitalization,but also have significant comprehensive benefits in promoting water resource conservation and intensive utilization,improving the ecological environment,conserving water sources,and reducing wind and sand hazards.With the goal of building an integrated monitoring and perception system for large-scale irrigation areas,based on technologies such as satellite remote sensing,UAVs,and ground sensors,combined with the current situation and existing problems of large-scale irrigation area operation and management,a comprehensive monitoring capability system covering space,air,and ground is constructed to achieve effective monitoring and perception of all elements and operation management processes of irrigation areas,providing strong monitoring technology support for the modernization development of large-scale irrigation areas.

Abstract:Water resource regulation is an important measure to ensure the ecological flow of rivers.Based on the implementation of the Dawenhe River water resource regulation in recent years,the imcompletion of the rigid constraint index system for water resources,the difficulty of controlling key water intake points,the low frequency of flow monitoring during warning periods,the insufficient backup ecological water sources for emergency regulation,and the large conflict between ecological and agricultural water use have been summarized.Suggestions such as to strictly manage the allocation of river water volume,improve the informatization level of water resource regulation,increase monitoring frequency during warning periods,reasonably allocate emergency regulation ecological water sources,and adjust the ecological flow guarantee goals of the Daicun Dam Hydrological Station have been put forward.These suggestions can provide reference for water resource regulation and management in other river basins.

Abstract:This paper delves into the valuable experience of comprehensive governance for urban black and odorous water in Binzhou.Through a comprehensive investigation of the current state of black and odorous water,pollution sources were identified,and a scientifically reasonable governance plan was formulated.A series of effective measures were implemented,including pollution interception and pipe network management,dredging and desilting,and ecological restoration,while also emphasizing the establishment of a long-term management mechanism with enhanced supervision and assessment.During the governance process,social capital was actively introduced to promote technological innovation,improving governance efficiency and quality.In addition,publicity and guidance were strengthened to raise public environmental awareness,creating a positive atmosphere where the entire society works together and stimulating enthusiasm for participation from all parties.Through these efforts,Binzhou has achieved significant results in the comprehensive governance of urban black and odorous water,providing valuable experience and reference for other cities.

Abstract:Boxing County of Binzhou,Shandong Province,is one of the water-receiving areas of the eastern route of the South-to-North Water Diversion Project.Following the completion of the follow-up supporting projects,Boxing County will face a multi-source water supply pattern consisted of surface water,groundwater,Yellow River water,and Yangtze River water.Price disparities have led water-receiving areas to regard Yangtze River water from the South-to-North Water Diversion Project as a backup source,making it difficult for Yangtze River water to receive treatment equal to that of Yellow River water and local water resources.Based on the regional comprehensive water price reform,this paper investigates and forecasts water demand only for non-agricultural water users of Dayuzhang Qushou Reservoir and Boxing Reservoir.Through water demand forecasting and available water supply analysis,a water resources allocation scheme oriented toward regional comprehensive water price reform is proposed.The results can provide a reference for regional comprehensive water price reform in water-receiving areas of the South-to-North Water Diversion Project.

Abstract:This paper focuses on the operation and maintenance management of groundwater in Xilin Gol League,aiming to address the existing issues in groundwater management and achieve sustainable water resource utilization.Through literature review,field research,and case analysis,the current situation is thoroughly analyzed.The study found that Xilin Gol has accumulated experience in groundwater management,including the development of policies and regulations,as well as the application of technical measures.However,there are still issues such as an incomplete management system and limited technical capacity.Based on this,optimization strategies are proposed,including innovating the management system,strengthening technical support,utilizing economic measures to encourage social participation,and formulating strategies to adapt to environmental changes.The research results provide important reference value for improving groundwater management in Xilin Gol and ensuring the rational development and utilization of regional water resources.

Abstract:Efficient and accurate processing and analysis of flow measurement data in irrigation districts are of great significance for optimizing water resource management and ensuring agricultural production.Focusing on the application of VBA technology in the analysis of flow measurement data in irrigation districts,this paper elaborates in detail,through practical cases,on the use of the powerful data processing capabilities of VBA technology to organize,statistically analyze,and process hydrological data such as flow measurement data of irrigation channels.The system realizes automated data processing,complex calculations,and customized analysis functions.The system demonstrates significant advantages in improving the efficiency and accuracy of hydrological data analysis,providing strong technical support for the scientific management and decision-making of irrigation districts,and showing high practical value and broad prospects for application.