基于LUCC分析的流域灌溉优化水文响应模拟研究

Research on Hydrology Response Simulation of Basin Irrigation Optimization Based on LUCC Analysis

通过济南南部卧虎山水库上游"三川"流域1988年-2014年5期LUCC的分析与分布式水文模型SWAT模拟,研究了LUCC与流域径流的关系。针对流域以农业耕作为主、耕地变化量是近年来影响流域径流减少的因素这一现实情况,利用SWAT模拟了采取新旧灌溉定额对流域出口断面径流的不同影响。结果表明,农作物灌溉定额在减少了0.17%的情况下,位于流域出口的卧虎山水库入库量增加了0.31%,此结果对提高流域尺度下节水灌溉等水资源优化配置效率、加强水库调度的科学性具有重要指导意义。

Five phases of LUCC analysis and SWAT simulation are conducted on "Sanchuan" basin from 1988 to 2014, and the relation between LUCC and basin runoff is studied. According to the fact that agriculture is the major economic source of the basin, and cultivated land change is the factor influencing basin runoff in recent years, SWAT is utilized to simulate different influences of old and new irrigation quotas on the cross section runoff of basin outlet. Results indicate that, when irrigation quota decreases by 0.17%, inflow of Wohushan Reservoir located at the basin outlet increases by 0.31%. The results are of key guiding significance for improving the optimal allocation efficiency of water resources such as water-saving irrigation at the basin scale and enhancing the level of science of reservoir regulation.