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为探索SWAT模型在干旱半干旱地区径流模拟中的适用性,以岚河流域为例,应用SWAT模型对该流域年、月径流进行了模拟研究,选取1971～1987年的水文气象数据,结合GIS、RS、DEM技术选择径流曲线法(SCS)、蒸散发Penman-Monteith法、河道演算Variable storage法模拟流域分布式径流过程。结果表明,率定期与验证期的决定系数R2和Nash效率系数Ens分别在0.73～0.93和0.69～0.75之间,较好地反映了岚河流域的年、月径流水文过程,模型适用性较好,可为当地水资源评价、开发利用和优化配置提供技术支持。
In order to explore the applicability of SWAT model in runoff simulation in arid and semi-arid areas, taking Lanhe basin as an example, SWAT model was used to simulate the annual and monthly runoff. The hydrological and meteorological data from 1971 to 1987 were selected, , RS, DEM technology choose runoff curve method (SCS), evapotranspiration Penman-Monteith method, river calculus Variable storage method to simulate the distributed runoff process. The results show that the coefficient of determination (R2) and the Nash efficiency coefficient (Ens) are between 0.73 and 0.93 and between 0.69 and 0.75, respectively, which reflect the annual and monthly runoff hydrological processes of Lanhe River basin better, and the model has good applicability , Which can provide technical support for local water resources evaluation, development and utilization and optimized allocation.