基于SWAT模型的大通河流域径流模拟
SWAT model based runoff simulation of Datong river basin

【目的】采用SWAT(Soil and Water Assessment Tool)模型模拟大通河流域径流，为大通河流域水资源规划与管理提供科学依据。【方法】根据大通河气象水文、地形、土地利用、土壤类型等基础数据，以相对误差(Re)、线性拟合系数(R2)以及纳什效率系数(Ens)作为模型评价标准，研究SWAT模型对大通河流域径流的模拟效果。【结果】大通河流域月径流SWAT模拟值与实测值吻合较好，模型校准期(1978-1982年)和验证期(1983-1986年)的线性拟合系数、月径流相对误差以及纳什效率系数分别为：0.70，0.95%，0.69和0.69，-13.96%，0.68，表明SWAT模型能够较好地模拟大通河流域的月流量过程。【结论】SWAT模型可用于大通河流域径流模拟。
【Objective】Soil and Water Assessment Tool (SWAT) model was used to simulate flow of Datong river basin to provide scientific basis for water resources planning and management.【Method】Based on meteorology and hydrology information,terrain,land use and soil type of Datong river,SWAT model was established and relative error Re,linear degree R2 and Nash efficiency coefficient Ens were used to evaluate simulation results.【Result】The linear degree R2,relative error Re and Nash efficiency coefficient Ens of calibration (from 1978 to 1982) and validation period (from 1983 to 1986) were 0.70,0.95% and 0.69 and 0.69,-13.96% and 0.68,respectively,indicating that SWAT model was suitable for simulating flow of Datong river basin.【Conclusion】SWAT model was suitable for Datong river basin