Constructing the Modern Dujiangyan Irrigation System in Shandong for the Benefits to River Harness, Grand Canal Recovery and Optimization of Water Resources on the Huang-huai Plain

摘要

The harnessing of Yellow River has always been the focus of the state. Now the state has decided to implement the project of "introducing water from South to North", so it is very important to do research on the combination of this project with the treatment of Yellow River and Huaihe River, so as to realize the optimized deployment of the water resources in the Huang-huai Plain. The theoretical research of this topic has lagged behind the practical need now. Presently it can be said that the problems in the project of "introducing water from South to North", the problem of drought in the south of Huang-huai Plain and flooding in its north, and the problem of ecological disequilibrium. Having been working on the decision making research concerning the Yellow River and the water resources, the author thinks that now it is time to treat the Yellow River by summarizing the former experience of Yellow River harnessing in the past and working out the feasible harnessing strategy accordingly. The lessons learned from the former Yellow River harnessing experience is that the Yellow River has been isolated and Shandong has been separated in the lower reach of the Yellow River, the flood control tactics of "comprehensively planning and combining together the methods of storage and diversion" hasn't been realized, which has in turn caused the ecological disequilibrium. The major problem of Yellow River is that there are too few water yet too much sediment, which caused the disequilibrium between the water and sediment. The method to solve it is to increase the water supply and reduce the sediment. The focus shall be put on the increasing of water in the two ends of the river and reduce the sediment in the middle reach. In the upper reach if the water of Tibet can be introduced into the Yellow, the potential of water increase will reach hundreds of billions cubic meters; in the lower reach if the water can be introduced from Henan and Shandong into the Yellow River, the potential of water increase will reach about ten billions. The most efficient and rational method to increase water in the lower reach is to construct the present Dujiangyan water hub in Shandong province, which should be listed as the No. 1 project of the Ministry of the Water Resources.