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Estimating Minimum Ecological Water Required of the Western Route First Stage Project of China’s South-to-North Water Transfer Scheme for Water Exporting Rivers

【摘要】:正It is well known that there are abundant water resources in basin of the Yangle River,the first largest river in China,which is mainly located in Southern China.However,water resources are very scarce in the basin of the Yellow Rivet,which is mainly located in Northern China.So the western route project of south-north water transfer scheme(WRP-SNWTS)aims to transferring water from the Yangtze River to the Yellow River.The area of WRP-SNWT,located in the upper reaches of the Yangle River and the main areas of Sichuan and the marginal areas of the Qinghai-Tibet Plateau,has sufficient water resources but fragile ecology and environment,Therefore,it is necessary for WRP-SNWT to analyze the ecology water required. Based on the planning principles of from low elevation to high elevation and from small to large and from short to long and from easy to difficulty,the WRP-SNWT will be constructed through three stage projects. The western route first stage project of the south-north water transfer scheme(WRFST-SNWTS)is planned to transfer 4×109m~3/a from six tributaries of the Yalong river and Dadu river to Jiaqu of Yellow River,that is Daqu river and Niqu river which are the branches of Xianshui river,Sequ river and Duke river and Make river and Ake river which are the branches of Dadu river,which account for 65~70% of the total river run-off,it need more research that the rest run-off can satisfy,channel ecology water required. According to analysis ecological water required which mainly satisfy for aquicolous biology in water-exporting region,such as low air temperature,fish and aquicolous biology main living from May through August,and rivers are iced up from December to March of next year;ecology water required main for fish and aquicolous biology,the flow criterion of Tennant method is modified.The ecology water required of WRFSP-SNWTS is estimated by the flow data of Zhuwo gauging station and Zhuba gauging station and Chuosijia gauging station and Zumuzu gauging station.The result show that the ecology water required calculated by modified Tennant less 11 penitent than that of Tennant.This estimating result can supply more water resources for transferring to Yellow River,meanwhile,this can supply gist for research transferring water of WRFSP-SNWTS.

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