清河干流生态基流计算分析

根据清河干流八棵树水文站、开原水文站1988-2009年径流量资料,选取Tennant法、90%保证率最枯月平均流量法、NGPRP法等5种水文学方法对清河干流生态基流进行了计算,通过对各水文学方法计算结果的对比分析,发现Tennant法更适合用于清河干流生态基流的计算。根据不同水平年清河干流生态基流Tennant法的计算结果,并与清河干流实际径流进行对比分析,表明随着不同水平年降雨量的减少,清河干流生态需水的满足程度逐渐减小。

Calculation and analysis about ecological baseflow in main stream of Qinghe river

Based on the runoff data in Bakeshu station and Kaiyuan station from 1988 to 2009,the paper chose five hydrological methods including Tennant method, average flow method in the driest month with 90% frequency , NGPRP method to calculate the ecological baseflow of Qinghe river.According to the comparasiom and analysis of calculation result,it discovered that Tennant method is the most sutible for baseflow calculation in main stream of Qinghe river.Based on the result of Tennant mthod,the paper compared which with actual runoff. As the descrease of annual rainfall, it is more difficult to maintain the ecological baseflow in Qinghe river.