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SWAT是一个基于物理机制的分布式流域水文模型,其产流机制中对于地表径流、壤中流、浅层地下径流和深层地下径流的模拟方法比较实用,能够适用于不同气候条件和下垫面条件下的产汇流情况。本文将SWAT应用到黄河中游干旱半干旱区多沙粗沙典型流域之一窟野河流域,模拟了1980~1985年的日流量和月平均流量过程,分析并探讨了SWAT产流机制对水源划分和径流形成过程的影响。结果表明,水量平衡相对误差在10%~20%左右,但Nash-Sutticliffe效率系数都较低。本文对模拟结果进行了初步分析,认为SWAT产流机制不能有效模拟干旱半干旱地区的窟野河流域的壤中流、基流和春汛流量过程,并探讨了SWAT在干旱半干旱地区产流模拟可能存在的问题和值得深入研究的方向。
SWAT is a distributed basin hydrological model based on physical mechanism. Its flow mechanism is more practical for the simulation of surface runoff, mid-flow, shallow-subsurface flow and deep-ground runoff. It can be applied to different climatic conditions and underlying surface conditions Production and sinking under the situation. In this paper, SWAT was applied to the Kuye River basin, one of the typical sediment-rich and sandy arid regions in the arid and semi-arid region of the middle reaches of the Yellow River. The daily and monthly mean flow rates from 1980 to 1985 were simulated. SWAT runoff mechanism And the impact of runoff formation process. The results show that the relative error of water balance is about 10% ~ 20%, but the Nash-Sutticliffe efficiency coefficient is low. In this paper, a preliminary analysis of the simulation results shows that SWAT runoff mechanism can not simulate the soil inflow, base flow and spring flood flow processes in the Kuye River Basin in arid and semi-arid regions, and also discusses the possible mechanism of SWAT runoff simulation in arid and semi-arid regions Existing problems and deserves further study.