黑河流域节水工程实施对地下水补给资源影响变化分析

Analysis on the Groundwater Resoures Recharge After the Water-saving Works Executed in Heihe Basin

本文利用已有的水文地质资料,系统收集、整理了河西走廊地区黑河流域的水资源利用、水利化现状、节水工程实施状况,以1999年为水平年对黑河流域中下游地区由于节水工程的实施引起地下水天然补给资源的变化进行了分析计算。流域中下游地区的地下水资源与1999年相比将发生变化,中游张掖盆地地下水天然补给资源将减少10366.9万m3/a。下游的鼎新灌区地下水补给量较现状河道输水条件下减少7931.25万m3/a,额济纳平原地下水补给量增加26651.51万m3/a。地下水补给途径发生变化,主要补给由中游向下游转移。引起这种变化的主要原因是节水工程的实施。地下水补给量的变化也引起泉水溢出带泉水量减少。

In this paper, the hydrogeological data were systematically collected and arranged to analyze the water resource utilizatiort, water conservancy project conditions , water - saving works execute status in Heihe River basin in Hexi Corridor. Taken 1999 as theievel year, the variety of natural groundwater resourse recharge caused by water- saving works, were compared. The natural groundwater resources recharge in Zhangye basin in middle river will reduce by 10366.9 × 10^4m^3/a; The groundwater recharge of Dingxin irrigation district in lower river will, reduce by 7931.25 × 10^4m^3/a under the recent condition of transferring water in river course ;The groundwater recharge in Ejina plain will increase by 26651.51 × 10^4m^3/a. the main recharge will transfer to the lower river. The main reaso The groundwater recharge ways have changed, n that cause this variety is the water- saving works. The groundwater recharge variety also influence the spring resources in overflow spring zone.