中文摘要：

三江平原位于中国东北部,是国家重要的商品粮基地,水资源的变化影响区域农业经济的发展.应用SWAT（Soil and Water Assessment Tool）模型模拟挠力河上游流域径流变化特征,为研究沼泽性河流水文变化特征提供有效的方法.根据水文相似性原理和参数移植法把校准的模型应用于七星河流域,进行无资料流域的径流模拟,年径流模拟校准期和验证期的Nash-Sutcliffe效率系数、相关系数R2、相对误差PBIAS值分别为0.84、0.94、-5.70和0.91、0.93、-6.46,表明SWAT模型可以应用到七星河流域.

英文摘要：

Surface hydrology has changed significantly in the marsh rivers of the Sanjiang Plain which plays an important role in guaranteeing the security of the China＇s food supply.The soil and water assessment tool （SWAT） was used to simulate discharge of the upper Naolihe River watershed,the satisfying simulation results indicating the applicability of the model to marshy rivers.Because of no or sparse hydro-meteorological data in a number of basins of marshy rivers,the calibrated SWAT model was applied to the Qixinghe River watershed according to model parameters transplantation method.The Nash-Sutcliffe model efficiency （NS）,coefficient of determination （R2） and Percent bias （PBIAS） for annual flow were 0.92,0.96,-0.05 for calibration periods and 0.96,0.97,-0.18 for validation periods,respectively,suggesting that the SWAT model could be applied to this basin.