SWAT模型在东江流域的应用研究

Application of SWAT Model in Dongjiang River Basin

以SWAT模型为研究工具，对该模型在东江流域的3个子流域的适用性进行研究，研究表明，SWAT模型在东江流域3个子流域的适用性较好，校准期（1970～1975年）日径流模拟和月径流模拟的相对误差Re均在10％以内，日径流模拟的决定系数R。均在70％以上．月径流模拟的决定系数尺。均在80％以上，Nash—Sutteliffe效率系数基本达到70％；验证期（1976。1985年及1996。2005年），月径流模拟的决定系数尺。和Nash—Sutteliffe效率系数均在70％以上．相对误差尺e基本在±20％以内，可以满足该流域的水资源评价与规划的要求。

The applicability of SWAT model in the 3 subbasins of the Dongjiang River Basin was studied. The result shows that the SWAT model for the 3 subbasins performs well. In the calibration period （1970-1975）, the relative errors （Re） of daily runoff simulation and monthly runoff simulation are within 10%, the coefficient of determination （R2） of daily runoff simulation are more than 70%, those of monthly runoff simulation are more than 80%, and the Nash-Suttcliffe efficiency （NS） are above 70%. In the validation period （1976-1985 and 1996-2005）, R2 and NS of monthly runoff simulation are above 70%, Re of it are almost within ＋20%. It can meet the requirements of water resources evaluation and planning in the Dongjiang River Basin.