Rational Water Resources Allocation in the Northwest Arid and Sandy Areas:--The Case Study of Yanan City of China
In the paper, the author takes the Yanan city as a case, which is the representative areas of the northwest arid and sandy areas in China, analyses the comprehensive effects on regional water resources, which caused by the changes of precipitation, the structure of social water use and soil and water conservation. On the basis of these, the water resources in Yanan city is rationally allocated, as the results are shown in this article. The author builds the rational water resources allocation model for Yanan city, also, the author analyses the effects on the results of allocation, which from the change of climate, water and soil conservation and the structure of social water use. The effects analysis includes the qualitative analysis and quantificational calculation. We find that the trend of precipitation is descending, but its difficult to quantify the effect from the change of the global climate and the alternation between the flood and dry period. And under the evolutional scenario of ecosystem, the flow in the river will be fluctuated less acutely, became evenly, it does good to utility water resources efficiently. The downstream water allocation is strongly influenced by the ways of human get and use water on the upstream, because the drainage of upstream will pollute the water flow to downstream. At last, the author puts forward some proposals for rational water resources allocation, and discusses the issues for the future water resources allocation.
water resources rational allocation the arid and sandy area state evolvement
Xiao Weihua Yu Fuliang Pei Yuansheng Zhao Yong
Department of Water Resources of IWHR, Beijing, 100044, China
国际会议
山东东营
英文
167-173
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）