干旱地区生态需水量的初步估算——以张掖地区为例

The Primary Estimation of Water Demand for the Eco-environment in Arid Regions

绿洲是干旱区人类活动的主体区域 ,绿洲的开发规模取决于水资源的利用程度、开发规模和管理水平。本文以此为出发点 ,在干旱区生态用水概念的基础上 ,对张掖地区生态用水进行分类 ,依据部分实验资料及理论公式推导确定各类生态用水定额 ,并以统计数据为依据 ,对其生态用水进行了初步估算。结果表明 ,张掖地区生态需水量达 9.74× 1 0 8m3。

Oasis is the major area of human activity in the arid land .The developing scale of oasis depends on the exploitation and managementes of water resources.Based on this, the paper discussed the conception of water demand for the eco-environment.The water demand by the eco-environment in Zhangye can be classified into 5 types.Then ,we determined the quota of different kinds according to the results of experience and theoretical information.The result showed that the water consumed by the eco-environment reached 9.74×108m3 in Zhangye.