Study On Floodwater Utilization And Ecological Water Allocation

With the population growth and socioeconomic development, the contradictionbetween water shortage and ecological degradation is becoming more and more serious.It is well known that water resources distribute unevenly in time and space. Most ofwater resources concentrate in the flood season in China. With this background, theutilization of floodwater resources has become an important way to dig the potential ofwater resources, use the peak value to support the deficiency, regulate economical wateruse and restore environmental flow. Based on win-win perspective of floodwaterresources utilization and environmental flow maintenance, this dissertation not onlyprobes into the basic theory and key issues of the above two concepts, but also doesresearch on floodwater resources utilization assessment and ecological water allocationbased on floodwater resources utilization.Floodwater resources utilization is a particular way to use surface water resources,which is a high level water resources utilization on challenges. First, the theory systemand key techniques of floodwater resources utilization are put forward in thisdissertation to answer the question that what is flood, whether can flood be utilized andhow to utilize flood securely and efficiently. An evaluation system of basin scalefloodwater resources utilization is constructed, which consists of current situationevaluation, potential evaluation and availability evaluation of floodwater resources.Second, according to characteristics of floodwater resources utilization, rules ofmoderate degree of ecology, economy and risk for floodwater resources utilization areproposed, including control index and quantification method for each rule. An approachto assess floodwater resources availability is proposed then. Third, ecological waterallocation model based on floodwater resources utilization is constructed which focuseson the rule of ecological moderation particularly. This dissertation establishes amulti-level analysis platform of ecological water operation, based on which theoptimization analysis methodology of ecological storage and its distribution for givenoperation target is proposed.The evaluation system of floodwater resources utilization and ecological waterallocation model based on floodwater resources utilization, which are put forward in thedissertation, are applied to Haihe River Basin and Huaihe River basin. It turns out that the evaluation system quantifies floodwater resources availability, which means thissystem can be applied to guide floodwater utilization in watershed. Promotingfloodwater resources utilization and ecological water allocation simultaneously canimprove guarantee degree of water use of economy and ecology effectively to achievethe win-win goal. Results of this dissertation enrich the theory and method system offloodwater resources utilization and ecological water allocation. The ecological waterallocation model can be developed and conversion problem between ecological storage,active storage and flood control storage can be researched in further work.