库区流域雨水资源分配及利用研究

Study on distributionand employment of the rain resource in reservoir area river basin

通过对黄前库区流域植被在自然降雨后对雨水资源的利用情况研究,探讨了库区雨水资源可利用的几种形式及其在特定环境条件下的分配比例.研究表明,在较小的降雨量下,植物直接利用的雨水资源占了绝大多数,但一次性降水量达到46.5 mm时,植物直接利用的雨水资源在40%以下,而土壤储存以备植物根系吸收利用的雨水资源达到了50%以上,人类可利用的雨水资源所占比例极少,一般在5%以下.

Some available ways and distribution proportion in special environment of rain resource in reservoir area＇s vegetation are discussed by studying on the utilization of them after natural rainfall in Huangqian reseroir area. It indicates that on the condition of small rainfall, plant can make use of most of the rain resource directly. But when one-off rainfall reach 46. 5 mm, the rain resource which can be directly used by plant is no more than 40%, while the rain resource which is stored by soil in order to supply to the root system of plant to imbibe and use is above 50%. The proportion of the rain resource which can be used by human kind is very small, and always below 5%.