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《Yellow River》 2016-01
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Analysis of Dominant Factors of Affecting the Released Water Amount of Zhengyixia Section of Heihe River

ZHAO Mengjie;JIANG Xiaohui;YAO Wenyi;LIU Jun;ZHAO Yan;DONG Guotao;College of Hydrology and Water Resources,Hohai University;Yellow River Institute of Hydraulic Research;  
By building the influence factor index system of released water of Zhengyixia section of the Heihe River,based on principal component analysis and entropy weight method,this study analyzed the dominant factors of released water of Zhengyixia section and made clear the influences of multi factor to the released water of Zhengyixia section. The results show that: a) when the closed days is more than 8days or the discharge of Yingluoxia section is more than 140 m3/ s and matches the closed process during the period of July to August,the water released effect of Zhengyixia section is good; when the closed time is 50 days or the inflow of Yingluoxia section reaches 0. 3 billion m3 during the period of August to October,the discharge ratio will reach to 80% and the final water diversion effect is good; b) the inflow of Yingluoxia section has great influence on Zhengyixia section's released water during the period of July to October,that is the inflow process dominates the change of Zhengyixia section 's released water; c) the main reasons why it can 't complete the discharge index of Zhengyixia section are Yingluoxia runoff process control,management means and the water diversion scheme itself. The management means mainly refer to the closed process control and area of cultivated land management of the middle reach.
【Fund】: 国家自然科学基金资助项目(91325201);; 水利部公益性行业科研专项(201301066 201401027 201401031)
【CateGory Index】: TV213.4
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