Water Resources Adjustment And Control In Yellow River Basin

In this paper, for keeping the health of rivers, from the point of the reasonable regulating capacity of the cascade reservoir storage, taking the Yellow River as an example, based on the analysis of the evolution of the Yellow River runoff and predication of the water demand in different levels, then calculated and regulated the size of regulating storage capacity in the different levels. The main research content and results are as follows:(1) According to the principle of optimality and limit, propose the connotation about the reasonable capacity of the reservoir storage cascade, then the problems about water demand predication, and the issues about separation and compensation of storage capacity are discussed in the solution process of the reasonable capacity.(2) Carried out an analysis of statistical about the elements of runoff flood of four representative stations on the mainstream of the Yellow River through the Mann-Kendal trend test, and the methods such as variation coefficient of the annual runoff and unevenly coefficient of the runoff distributed during the year, etc. Studies have shown that the whole runoff of the mainstream of the Yellow River present a steady decreasing trend.(3) Based on the long-term socio-economic development situation and the needs of the ecological environment construction, combined with the actual situation in the Yellow River Basin, put a predication of the different water demand in 2020,2030,2050 level years through the method of analyzing the index which are 57.641 billion m3,601.36 billion m3,63.827 billion m3 separately, showed a steady growth trend.(4) Under the premise of meeting the comprehensive utilization of water resources, established a model of reasonable regulating capacity of reservoir storage cascade, then calculated out the regulating capacity required of the Yellow River mainstream reservoirs in different level years, the results show that the existing regulating capacity of which can meet the requirements in 2020,2030 level years without any measurements. After regulating and controlling, the regulating capacity required of the Yellow River mainstream reservoirs reduced significantly, especially the implementation of the South-to-North water diversion project, the existing regulating capacity of cascade reservoir can meet the requirements of comprehensive utilization of Yellow River Basin water resources in different level years through the combined regulating.