基于水文循环过程的生态需水量化方法

Discuss on Quantification Method of Ecological Water Demand Based on Water Cycle Process

探讨了生态需水的概念,指出生态需水量的计算应从水文循环机理入手,以确保流域生态系统维持最基本健康水平.将分布式水文模型和生态系统健康评价方法融合在一起,建立了基于流域水文循环过程的生态需水量化方法.该方法以水文循环过程作为联系各种生态系统的纽带,可反映出不同用水量对流域生态系统整体健康状况的影响,克服了传统量化方法计算交叉、重叠的缺点,使计算结果更加合理可信.

The concept and implied meaning of ecological water demand are discussed, the advantage and disadvantage of traditional quantification methods are commented, and it is indicated that the calculation of ecological water demand should be departed from the angle of water cycle and establish the object of maintaining the most basal health level of ecosystem. The distributed hydrology model and health assessment method are syncretized together, and the quantification method of ecological water demand based on water cycle process is established. This method makes water cycle process as the link of each ecosystem and can reflects the effects of water quantity use on the whole health level of ecosystem in river basin. It conquers the shortage in traditional method that the calculation is intersectional and repetitive, and makes the result more rational and believable.