| In conclusion,shortage of water resources has always been the restrictive factor in promoting the economical and environmental development in this area。 Dunhuang is the most typical region of water resources problem in inland arid area of China 。 In recent years,With the high-intensity exploitation and utilization of water resources in Dunhuang,A series of water environment problems have emerged,Seriously affecting the sustainable development of social economy,It also threatens the safety of famous historical sites such as Yueya spring。Taking Dunhuang City as an example and focusing on water resources,this paper adopts the research methods of literature review,field survey,planning and design,This paper,by evaluating present situation of water resources utilization in Dunhuang City,In order to reduce the ecological water discharge from Shule River,studying the quality control technology of the main water diversion project in Dunhuang City--diverting water from Dahaerteng River to Danghe River,,analyzing the water-saving diversion scheme of Shule River based on the rational distribution of water resources in Dunhuang City,than puts forward relevant countermeasures 。 It aims to provide technical recommendations for solving the problem of water shortage in Dunhuang City,promote the rational use of water resources here,as well as offer references for the use of water resources in cities in Hexi Corridor。The main results are as follows:(1)This paper,by evaluating present situation of water resources utilization in Dunhuang CityBy analyzing the development and utilization of water resources in Dunhuang,For nearly half a century,Dunhuang city has formed a complete system of reservoir,trunk,branch,bucket and agricultural canal in the utilization of water resources。(2)The restrictive factors of rational utilization of water resources in Dunhuang City have been found out.the main factors leading to the change of water resources system in Dunhuang basin are the decrease of groundwater recharge and the increase of groundwater exploitation caused by a series of water conservancy projects.。(3)It also presents the scheme for water saving and distributing of Shule River based on thecomprehensive evaluation of water resources in Dunhuang CityIn view of the current situation of water shortage in the irrigation area along the main stream of Shule River,it is undoubtedly a very challenging task to ensure the annual discharge of ecological water to the downstream.In order to reduce the ecological water discharge from Shule River,it is planned to divert water from the Hazidang Project so as to lay a foundation to solve the contradiction between the supply and demand of water resources in Dunhuang and realize the water-saving diversion plan.。(4)The major technical problems in the project of bringing water from DahaertengThe major technical problems in the project of bringing water from Dahaerteng River to Danghe River are analyzed.The problems of high slope stability,landslide,leakage and collapsibility in the project of bringing water from Dahaerteng River to Danghe River are analyzed,and the corresponding treatment measures are put forward,providing a guarantee for the smooth implementation of the project.(5)It also presents the scheme for water saving and distributing of Shule River based on the comprehensive evaluation of water resources in Dunhuang CityBrings forward the allocation scheme for the main stream entering Dunhuang along Shule River after the discharge of Shuangta Reservoir and water-saving measures in Changma and Shuangta irrigation areas,in line with the assessment on water saving potential of the Shule River in Dunhuang City and the forecast of economic development in water demanding region.(6)The Countermeasures for rational utilization of water resources in Dunhuang city are put forwardBased on the analysis of the current situation of water resources utilization in Dunhuang City,some corresponding countermeasures are put forward。... |
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