Analysis on annual variation and seasonal change of runoff from water resources utilization in the interior rivers--the case of Tarim River
内流河流域水资源利用对径流年际年内变化影响的分析——以塔里木河流域为例

Tarim drainage basin refers to the total sum of all the stream systems which have natural and artificial hydraulic connection, especially the surface water connection, with Tarim River. Therefore, it should include the stream systems of Hotan River, Yarkant River, Aksu River, Ogan River, and Kaidu-Konqi River. The relation of the stream systems of Ogan River and Kaidu-Konqi River with the main stream of Tarim River is weak. So the other three stream systems that have a direct hydraulic connection with the main stream of Trim River are taken as the analytical objects in this paper. The annual and seasonal transformations from water resources utilization in the Tarim drainage basin are analyzed, which include the change of discharge and temporal and spatial distribution of runoff, etc. caused by sharply increased channeled water due to population growth and enlargement of irrigation area in recent 40 years. The results show that the runoff in the main stream of Tarim River is reducing year by year, its seasonal distribution is concentrated, and the concentrated period is lagging year by year due to the increase of water consumption at the upper reaches and decrease of water recharge to the lower reaches. These hydrological effects directly threaten the future of the irrigated areas and green corridor at the lower reaches of the Trim River, where the eco environment is extremely fragile. Therefore, Tarim drainage basin must be managed in an overall planned way.