Streamflow Variations of Four Source Streams to Mainstream of Tarim River,Xinjiang and Water Transportation in 2006

The Aksu,Hotan,Yarkant and Kaidu-Konque Rivers are four source rivers of Tarim River drainage.The three tributary river systems(Aksu,Hotan and Yarkant) that contribute flows to the Tarim River join just above the Aler gauging station where the Tarim River begins.From the confluence of its three main contributing tributaries,the Tarim River mainstream extends 1 321 km to Taitema Lake.In addition the Kaidu-Konque River Basin,which is hydrologically separate from the Tarim River,contributes water to the Tarim River by means of a man-made transfer channel.In 2006,annual virgin flow of 268.9×108m3 from four mountains basins of Aksu,Hotan,Yarkant and Kaidu-Konque Rivers drain into the Tarim Basin,more 17.4% than average annual streamflow,is an abundant hydrological year.The annual total virgin flow of Aksu,Hotan and Yarkant above the Aler gauging station are 228.6×108m3 from the mountains basins,more than average annual streamflow by 18.0%and of the Kaidu-Konque River from Tianshan Mountains 40^33×108m3,more 20.4% than average annual streamflow,is an abundant hydrological year.The total discharge of the four source rivers into Tarim River is 50.26×108m3 in 2006,which three tributary river systems(Aksu,Hotan and Yarkant) contributes 47.58×108m3 flows to the Tarim River,occupy up 20.8 % of annual virgin flow from mountains basin.The interzone consumed water of the Tarim River mainstream are estimated to be 33.55×108m3 for the upper course from Aler to Yingbazha,account for 58.8% of annual streamflow of Aler Station,the largest consumed section of the Tarim River mainstream;16.56×108m3 for the middle course from Yingbazha to Qiala,occupy up 29.0 %of Aler ones and 6.97.16×108m3 for the downstream course.Comparing with average annual consumed water,interzone consumed water in 2006 has an increasing in upper streams course and decreasing in middle course,and normal in the lower course.The eighth ecological emergency water diversion project was carried out in Tarim River in 2006,outflow 2.33×108m3 drains into the lower reaches of Tarim River,in which transfer water 0.26×108m3 from Bosten Lake,and 2.07×108m3 from the Tarim River mainstream.