黄河流域土壤水资源评估

Appraisal of soil water resources within Yellow River Basin

应用区域水量平衡模式计算了黄河全流域、上、中、下游地区和西北黄河区的土壤水资源量。全流域土壤水资源量多年平均为2681.4亿m3,占降水量的81.5%,是水资源总量的4.47倍。西北黄河区的土壤水资源量为2436.8亿m3,占全流域的土壤水资源量的90.9%,占降水量的81%,是水资源总量的4.27倍。黄河流域土壤水资源量是水资源重要组成部分,是极宝贵的农业水资源。

The regional water balance model is applied to calculate the soil water resources within the whole river basin including the upper, middle and lower reaches of the Yellow River and the region of the basin in the Northwest China. The results show that the mean soil water resources in the whole Yellow River basin is 2. 68 × 10^11 m^3 , which accounts for 81.5% of the precipitation, and 4, 47 times of the gross water resources therein. And the soil water resources in the Yellow River basin in Northwest China is 2.44× 10^11 m^3 , which accounts for 90. 9070 of the soil water resources in the whole Yellow River basin, and 8107o of the precipitation and 4. 27 times of the gross water resources in this region. The soil water resources is an important component of the water resources in the Yellow River basin, and also is a very precious agricultural water resources.