Discussion on Anti-Seepage Technologies in the Construction of Small-Scale Rural Water Conservancy Projects

In order to ensure the sustainable growth of rural economy,it is necessary to carry out further research on small-scale water conservancy projects and solve the seepage issue in rural areas.Based on the application significance of small-scale rural water conservancy projects and the analysis of anti-seepage technologies,along with specific examples,this paper specifically discusses the application of high-pressure jet technology,so as to provide reference for the development of engineering construction.

Research on Financial Risk Management in the S Water Conservancy Project and Its Implications for Similar Projects

As a vital infrastructure initiative with significant impacts on national development and public welfare,water conservancy projects play an essential role in advancing agricultural development and mitigating losses caused by flooding.However,these projects often require substantial investments and extended construction periods,leading to the inevitable emergence of various financial risks during implementation.This paper aims to explore the current challenges in financial risk management of the S water conservancy project,offering practical management strategies and solutions to address these financial difficulties.Through a detailed assessment and analysis of the S water conservancy project,the study seeks to provide valuable references and insights for similar projects to better manage financial risks,ensuring their smooth progression and successful completion.The proposed control measures are designed not only to effectively mitigate the financial risks specific to the S water conservancy project but also to offer actionable lessons for other similar projects.By promoting and applying these measures,the overall financial management capabilities of the industry can be enhanced,providing robust support for the sustainable development of water conservancy projects.

Joint optimization scheduling for water conservancy projects incomplex river networks

In this study, we simulated water flow in a water conservancy project consisting of various hydraulic structures, such as sluices, pumping stations, hydropower stations, ship locks, and culverts, and developed a multi-period and multi-variable joint optimization scheduling model for flood control, drainage, and irrigation. In this model, the number of sluice holes, pump units, and hydropower station units to be opened were used as decision variables, and different optimization objectives and constraints were considered. This model was solved with improved genetic algorithms and verified using the Huaian Water Conservancy Project as an example. The results show that the use of the joint optimization scheduling led to a 10% increase in the power generation capacity and a 15% reduction in the total energy consumption. The change in the water level was reduced by 0.25 m upstream of the Yundong Sluice, and by 50% downstream of pumping stations No. 1, No. 2, and No. 4. It is clear that the joint optimization scheduling proposed in this study can effectively improve power generation capacity of the project, minimize operating costs and energy consumption, and enable more stable operation of various hydraulic structures. The results may provide references for the management of water conservancy projects in complex river networks.

Evaluation index system for positive operation of water conservancy projects

The conditions for the positive operation of water conservancy projects are described in this paper. A scientific and effective evaluation index system was established based on frequency analysis, theoretical analysis, and expert consultation. This evaluation index system can be divided into six first-level indices： the degree to which facilities are intact and functionality standards are reached, the status of operation and management funds, the rationality and degree of advancement of the management team structure, the adaptability and rationality of the water conservancy project management system, the degree of automatization and informationization of the management techniques, and the conduciveness of the exterior environment. The weights for evaluation indices were obtained through the analytic hierarchy process method with consideration of the difference between public welfare and profit-oriented water conservancy projects. This study provides a scientific method for evaluating the positive operation of water conservancy projects.

θ-improved limited tolerance relation model of incomplete information system for evaluation of water conservancy project management modernization

The modernization of water conservancy project management is a complicated engineering system involving a management system, a management method, management personnel, the exertion of social, economic, and ecological effects, and so on. However, indices for evaluating the modernization of water conservancy project management are usually unobtainable in practical applications. Conducting appropriate extension of the classical rough set theory and then applying it to an incomplete information system are the key to the application of the rough set theory Based on analysis of some extended rough set models in incomplete information systems, a rough set model based on the θ-improved limited tolerance relation is put forward. At the same time, upper approximation and lower approximation are defined under this improved relation. According to the evaluation index system and management practices, the threshold for θ is defined. An example study indicates the practicability and maneuverability of the model.

Analysis on Regulation Effect of Water Conservancy Project in Upper Reaches of Wujiang River,Guizhou on Runoff

Based on monthly runoff data of Hongjiadu,Guizhou from October 2013 to June 2015 and monthly runoff data of Yachi River,Guizhou from April 2014 to May 2015,using REOF and multiple linear regression analysis,regulation effect of water conservancy project in upper reaches of Wujiang River on monthly runoff of the river was analyzed. Seasonal temporal-spatial change of monthly runoff in Hongjiadu and Yachi River mainly contained two kinds of modalities. The first modality was that of Yachi River,which was main component of seasonal change of monthly runoff,and peak appeared in July. Space load of Yachi River modality was larger than Hongjiadu,and manual control ability of monthly runoff in Hongjiadu was larger than Yachi River. The second modality was that of Hongjiadu,and peak appeared in December. Space load of Hongjiadu modality was larger than Yachi River,and manual control ability of monthly runoff in Yachi River was larger than Hongjiadu. Seasonal changes of time components of two modalities had significant inverse phase. Regulation effect of Hongjiadu modality advanced Yachi River modality,and regulation effect of water conservancy project in Hongjiadu modality was larger than that of Yachi River modality,and seasonal distribution characteristics of regional rainfall was basically eliminated in Hongjiadu modality. Some seasonal distribution characteristics of regional rainfall were maintained in Yachi River modality. Monthly runoff modality of Yachi River had water storage regulation effect on a smaller part of regional monthly rainfall modality. Monthly runoff modality of Hongjiadu mainly had water storage regulation effect on south-north type of component of regional monthly rainfall,while most components of regional monthly rainfall modality did not have significant impact on monthly runoff modality of Hongjiadu.

A Study on Cost Control of Agricultural Water Conservancy Projects Based on Activity-based Costing

Based on the theory of activity-based costing and the idea of value chain,activity optimization and cost control are carried out on the whole construction process of agricultural water conservancy projects. Through the use of literature review,case analysis and statistical analysis and other methods,with agricultural water conservancy projects as the research object,and comparing activity-based costing with the traditional model of cost accounting,the writer carries out the corresponding value chain analysis,and comes to the following conclusion: the statistical calculation and analysis of the entire construction process based on activity-based costing can accurately and effectively control the costs of water conservancy projects. Through the use of activity-based costing,the cost data of agricultural water conservancy projects is more detailed and accurate,and cost management personnel can also find non-value-added activities,optimize the enterprise's value chain and achieve cost control objectives through the analysis of the activity chain and value chain of agricultural water conservancy projects.

Research on performance evaluation of small water conservancy facilities construction project in Hebei Province

This paper takes Hebei province of small water conservancy facilities construction project as the research object, the performance evaluation purposes of construction of farmland water conservancy facilities project, the data sources when carry out performance evaluation, performance evaluation procedures and limitations of farmland water conservancy facilities construction project performance evaluation were discussed.

River Treatment and Measures in Water Conservancy Projects of Small Farmland

China is country of massive agriculture.Although it has gradually changed from traditionalagriculture to modern agriculture in recent years, thereare still many problems in the transition. Rivers playan important role in water conservancy projects offarmland. Therefore, full attention should be paid toriver management of farmland. This thesis analyzes itand proposes countermeasures for governance.

Discussion on Anti-seepage Wall and Anti-seepage Technology of Water Conservancy Project

The water infiltration problem of water conservancy projects is one of the more common problems in the construction of water conservancy projects,which seriously affects the overall construction quality and safety of water conservancy projects.This article studies the causes of water infiltration in water conservancy projects and introduces related antiseepage technologies,hoping to be a reference for the implementation of anti-seepage projects.Through research,it is found that the factors that cause water infiltration in water conservancy projects include water conservancy project structural changes,environmental factors and construction factors.Relevant personnel can use concrete anti-seepage wall construction technology and high-pressure jet grouting technology to do the relevant anti-seepage work of water conservancy projects.

Research on the Present Situation and Improvement Strategy of Water Conservancy Project Construction Quality Management based on the Quality Efficiency Equilibrium Theory

In this paper, we conduct research on the present situation and improvement strategy of the water conservancy project construction quality management based on quality efficiency equilibrium theory. Water conservancy engineering construction enterprises should refer to oneself circumstance, and the characteristics of the water conservancy project, determine the quality objectives of specific quality assurance plan and the related measures, clear implementation content, methods and effects. Strictly control the factors influencing the water conservancy engineering quality of many aspects, in the process of the water conservancy project construction, to establish a meet the requirements of the technical process and quality standards, operation procedures. Establish the strict appraisal system, continuous improvement and improve the level of construction technique and technology. Establish strict quality assurance system and quality responsibility system, each division, subdivisional work will comprehensively implement in place management to ensure the engineering quality.

Key techniques for evaluation of safety monitoring sensors in water conservancy and hydropower engineering

For the evaluation of construction quality and the verification of the design of water conservancy and hydropower engineering projects, and especially for the control of dam safety operation behavior, safety monitoring sensors are employed in a majority of engineering projects. These sensors are used to monitor the project during the dam construction and operation periods, and play an important role in reservoir safety operation and producing benefits. With the changing of operating environments and run-time of projects, there are some factors affecting the operation and management of projects, such as a certain amount of damaged sensors and instability of the measured data. Therefore, it is urgent to evaluate existing safety monitoring sensors in water conservancy and hydropower engineering projects. However, there are neither standards nor evaluation guidelines at present. Based on engineering practice, this study examined some key techniques for the evaluation of safety monitoring sensors, including the evaluation process of the safety monitoring system, on-site detection methods of two typical pieces of equipment, the differential resistor sensor and vibrating wire sensor, the on-site detection methods of communication cable faults, and a validity test of the sensor measured data. These key techniques were applied in the Xiaolangdi Water Control Project and Xiaoxi Hydropower Project. The results show that the measured data of a majority of sensors are reliable and reasonable, and can reasonably reflect the structural change behavior in the project operating process, indicating that the availabilities of the safety monitoring sensors of the two projects are high

Spatiotemporal evolution of water conservation function and its driving factors in the Huangshui River Basin, China

The Grain for Green project has had a substantial influence on water conservation in the Huangshui River Basin,China through afforestation and grassland restoration over the past two decades.However,a comprehensive understanding of the spatiotemporal evolution of water conservation function and its driving factors remains incomplete in this basin.In this study,we utilized the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)model to examine the spatiotemporal evolution of water conservation function in the Huangshui River Basin from 2000 to 2020.Additionally,we employed the random forest model,Pearson correlation analysis,and geographical detector(Geodetector)techniques to investigate the primary factors and factor interactions affecting the spatial differentiation of water conservation function.The findings revealed several key points.First,the high-latitude northern region of the study area experienced a significant increase in water conservation over the 21-a period.Second,the Grain for Green project has played a substantial role in improving water conservation function.Third,precipitation,plant available water content(PAWC),grassland,gross domestic product(GDP),and forest land were primary factors influencing the water conservation function.Finally,the spatial differentiation of water conservation function was determined by the interactions among geographical conditions,climatic factors,vegetation biophysical factors,and socio-economic factors.The findings have significant implications for advancing ecological protection and restoration initiatives,enhancing regional water supply capabilities,and safeguarding ecosystem health and stability in the Huangshui River Basin.

Analysis of Winter Concrete Construction in Water Conservation Project

The construction of water conservancy projects should commence during optimal atmospheric conditions and non-flood period to ensure completion before the flood season begin in summer.In most areas of Northern China,the temperature during winter remain at lower level,in which environmental factors play the most important role in the construction of water conservancy projects.In particular,low temperature directly affects the strength of concrete and delays its solidification,this highly affects the quality and progress of concrete construction.In order to overcome this barrier,better planning,for reasonable and effective construction techniques and targeted control measures should be adopted to reduce the adverse effects of low temperature to assure a strong and safe architecture.

水利工程中数字孪生虚拟实体轻量化研究

近年来,数字孪生技术在水利领域正在快速发展。其中,数字孪生数据底板存储着水利工程全生命周期中的信息,存在数据量庞大、管理复杂、更新成本增加等问题。同时,以WebGL为核心引擎渲染加载的应用层数字孪生平台受网络带宽和计算机性能的限制,面临着轻量化处理的挑战。针对数字孪生虚拟实体维度中的几何模型数据,利用改进QEM(Quadric Error Metrics,二次误差测度)算法和Low-Poly算法进行轻量化处理,选取水轮机导水机构作为案例,研究在满足数字孪生业务需求下的最优简化程度。结果表明:轻量化的处理是必要的;轻量化处理后的模型文件大小大幅度减小;在满足数字孪生精细度等级4个精度等级的简化程度的上限分别为原始数据、40%左右、70%左右、98%左右。

固化水库底泥制备人工骨料及其性能研究

水库底泥中含有大量无机质,经过处理后,可以用底泥生产建筑材料。采用固化剂固化水库底泥制备人工骨料,通过正交实验研究固化剂的最优掺量(固化剂的掺量以水库底泥的掺量为基准),其结果为:硅酸钠8%、石膏6%、聚羧酸高效减水剂3%、三乙醇胺0.05%(下文简称为SRPT)。然后,掺入最优SRPT作为附加固化剂制备出人工骨料并探究其性能。结果表明:掺入最优SRPT组骨料的筒压强度最大为7.31 MPa,相比于不掺固化剂组提升了44.2%,1 h吸水率为9.34%,堆积密度为937 kg/m^(3)。用SRPT固化剂固化水库底泥制备人工骨料可以高价值利用水库底泥,并且制备的骨料满足规范要求,研究成果为水库底泥在水利工程中的利用提供了新思路。

基于AHP的水利工程物业化管理服务商优选模型研究

为了客观、公正地反映水利工程物业管理评标过程,利用层次分析法理论对服务商优选问题开展研究,对4条准则和9项指标进行分析,构建决策层次模型,并确定各指标的权重。最后模拟某县水利工程物业化管理评标过程,通过该模型择优评出最佳服务商。

上海市某商业广场项目高效制冷系统改造工程实践

以上海市某商业广场项目高效制冷系统改造工程为例,介绍了该工程概况及高效制冷系统改造工程的全过程服务,从空调制冷系统现场勘测及检测评估、集成磁悬浮副冷站高效机房设计、主冷站高效制冷系统设计、高效制冷系统实施重难点解决方案、高效制冷系统的改造实效5个方面进行了详细说明。提出了既有大型商业高效制冷系统运行痛点和解决措施,系统性地归纳、总结了适用于改造工程的高效制冷系统的技术路径与实施建议。

清代云南水利研究的转向

清代云南水利研究起步于水利工程的研究,围绕水利工程及其影响展开;呈现出以中小型水利工程为主,水利工程类型多样,主要围绕城市而建等特点。在区域水利社会史研究的驱动下,清代云南水利研究由水利工程、水利技术史向水利社会史转型,由此展开以水利为核心的地域性自然和社会关系研究。在类型学视野下开展清代云南水利社会史实证研究,对于深入认识区域水利社会的多样性和复杂性是可取的,亦可丰富水利社会史的区域研究。

西安市《城市生产建设项目水土保持技术规范》实践与思考

由西安市水务局主导提出并归口的《城市生产建设项目水土保持技术规范》(DB6101/T 3094—2020)(以下简称《规范》)于2020年12月23日发布,2021年1月23日起正式实施。《规范》明确定位于全方位指导西安市城市建成区和规划区范围内可能引起水土流失的房地产、市政工程和公共服务生产建设项目水土流失防治工作,细化了水土流失防治目标,优化了项目概况介绍,完善了主体工程水土保持评价,强化了水土保持措施体系与设计。《规范》施行3 a来,已指导2000余个城市生产建设项目水土保持方案编制、设施验收等工作,西安市约83%的生产建设项目加大了绿地建设规模、约61%的项目减少了径流损失、约54%的项目降低了水土流失风险;西安市生产建设项目年均径流损失量减少3.58万m^(3),年均土壤侵蚀量减少169.05 t,城市水土保持工作成效显著。