MIKE SHE模型在杭锦旗引黄灌区的应用研究

Study and Application of MIKE SHE Model in the Hangjin County Yellow River Irrigation Area

农田灌溉排水作为灌区退水的重要部分,在改善耕地与抵御灾害过程中起到了重要作用。以杭锦旗引黄灌区为研究对象,采用MIKE SHE分布式水文模型,以2017—2018年为率定期、2019年为验证期,模拟分析灌区排水过程,为灌区排水规律研究提供模型基础支撑;最终2019年模拟结果相关系数达到0.7734,年排水量相对误差为3.7%。结果表明:在实测排水数据受干扰影响较小的情况下,模拟值与实测值拟合程度较高,模型可以较好地模拟灌区天然排水过程。

As an important part of return water in irrigation area,drainage water plays an important role in improving cultivated land and re⁃sisting disasters.Taking the Hangjin County Yellow River irrigation area as the research object,using MIKE SHE distributed hydrological model and taking 2017-2018 as the calibration period and 2019 as the validation period,the drainage process of irrigated area was simulated to provide model foundation support for the study of drainage law in irrigated area.Finally,the correlation coefficient of 2019 simulation re⁃sults reached 0.7734,and the relative error of annual displacement was 3.7%.The results show that:under the condition that the measured drainage data is less affected by the interference,the simulation value and the measured value have a higher degree of fitting,so the model can better simulate the natural drainage process in the irrigation area.