祁连山区水资源及其对河西走廊生态环境的影响

根据甘肃省河西地区石羊河、黑河和疏勒河三大内陆水系的祁连山区流域水资源和出山径流量,详细地计算了河西走廊各县市绿洲的实际年水资源。从生态平衡角度出发,确定了各县市绿洲和农田的生态需水量。据此,计算出基本能保持各县市自然生态平衡的绿洲和农田的适宜面积。

WATER RESOURCE IN QILIAN MOUNTAINOUS REGION AND ITS INFLUENCE ON ECOLOGICAL ENVIRONMENT OF HEXI CORRIDOR

According to the calculation of the water resources of the Shiyanhe,Heihe. Shuleke River basins in the Hexi Corridor and their original runoff volumes, it shows that the actual annual water resources in the oasis of every county and town of the Hexi Corildor are 285-770mm,which is 1. 3-18. 5 times the local annual precipitation. From the point of view of ecological balance, the ecological water need in oasis in every county and town is 400-500mm and that in the farmland is 450-650mm. On the basis of the above mentioned calculation,to basically keep the natural ecological balance of every county and town, the proper oasis area should be 2. 92- 17. 26 ×10⁴ ha,and that in the whole Hexi Corridor may be expanded to 117. 24 × 10⁴ ha ,which is 6. 61 × 10⁴ ha larger than now; the proper farmland area should be 1. 43- 8. 28 ×10⁴ ha and that in the whole Hexi Corridor may be expanded to 57.98 × 10⁴ ha,which is 9. 32 ×10⁴ ha larger than now.