基于SWAT模型的汉江流域径流模拟

Runoff Simulation of Hanjiang River Basin Based on SWAT Model

为建立可靠的水文水动力耦合模型,首先探讨水文模型在汉江流域的适用效果。以汉江流域汉中水文站以上区域为研究范围,以中国大气同化数据集(CMADS V1.0)为气象驱动,建立分布式水文模型,并以水文站实测日径流资料进行参数的率定及验证。结果表明:模拟结果与实测值吻合较好,日径流模拟在校准期(2010年-2013年)纳什效率系数和决定系数达到了0.77和0.78,在验证期(2014年-2017年)纳什效率系数和决定系数分别为0.74和0.75,表明SWAT模型在该地区有良好的适用性。

In order to establish a reliable hydrologic-hydrodynamic coupling model, the applicability of the model in the Hanjiang river basin was discussed first. The upper area of Hanzhong Hydrologic Station in Hanjiang River Basin was taken as the research area, the distributed hydrological model was established based on the China Meteorological Assimilation Driving Database for the SWAT model(CMADS1.0). And the parameters were calibrated and verified based on the measured daily runoff data of the hydrologic station. The results showed that the simulation results were in good agreement with the measured values. And the Nash-Suttcliffe efficiency coefficient and determination coefficient of daily runoff in the calibration period(2010-2013) reached 0.77 and 0.78. During the verification period(2014-2017), the Nash-Suttcliffe efficiency coefficient and the determination coefficient were 0.74 and 0.75 respectively, indicating that the SWAT model is applicable to this region.