中文摘要：

以粤北连江星子河流域作为研究区域，以分布式水文模型SWAT作为模拟工具，对流域内的水文过程进行模拟。采用凤凰山水文站2001—2009年的实测月平均径流量数据进行敏感性分析和参数率定，并以相对误差（R_E）、决定系数（R2）以及Nash—Suttcliffe效率系数（Ens）作为模型的适用性的评价指标。结果表明各项评价指标均符合精度要求，SwAT模型适用于星子河流域的径流模拟。

英文摘要：

Taking the Xingzi River in Lianjiang Basin in northern Guangdong as the subject, using the SWAT （soil and water assessment tool） model, consulting the monthly data collected by the Fenghuangshan hydrological station from 2001 to 2009 and adopting R_E, R2 and Ens for the calibration and the sensitivity analysis of the model, we simulated the hydrologic process. The results indicated that the evaluation indexes adopted in our simulation met the requirements for accuracy and the SWAT model is suitable for the simulation of the runoff of Xingzi River.