摘要
本文引入对融雪径流模块进行改进的SWAT模型,以辽宁中部地区汤河西支为例,结合研究流域内实测2000—2010年水文数据,对比分析模型改进前后水文模拟精度,此外,运用改进后的SWAT模型实现了流域水量空间模拟。研究结果表明:改进后的SWAT模型由于考虑辽宁中部区域融雪径流特点,在汤河西支流域水文模拟精度较高,改进后的SWAT模型模拟的径流和实测径流之间的相对误差相比于改进前均值减少3.68%,流量过程的拟合系数提高近0.17。研究流域径流呈现北大南小分布和降水分布一致,降水量空间分布决定区域水资源空间分布,降水较大区域,径流深相对较大,反之,径流深较小。研究成果可以为辽宁中部区域水文模拟提供参考。
In the paper,the SWAT model which improved the snowmelt runoff model of the traditional SWAT model was used to simulate the runoff in the central region of the Liaoning province,the west Brach of the Tanghe River was selected as the case area.Based on the observed hydrological data during2000-2010,the simulation accuracy of the improved model and traditional model was compared,and using the improved SWAT model to realize the simulation of basin water quantity.The result shows that：the improved model has higher runoff simulation accuracy than the traditional SWAT model due to considering the characteristics of snowmelt runoff in central Liaoning,compared to the traditional SWAT model,the relative error of between the observed and simulated runoff by the SWAT model was reduced by 3.68%,and the fitting coefficient of the process flow was increased by nearly 0.17.The unbalanced distribution of the runoff was agreement with the distribution of the precipitation,the spatial distribution of rainfall determined the spatial distribution of water resources in the region,a large area of precipitation,the runoff depth is relatively large,on the contrary,less runoff.Research provides a referenceto the hydrological simulation in the central region of the Liaoning province.
关键词
MSWAT模型
径流模拟
拟合系数
降水量
汤河西支流域
improved SWAT model
runoff simulation
fitting coefficient
rainfall
the west Brach of the Tanghe river
