中文摘要：

SWAT模型是一个具有物理基础的分布式水文生态评价模型,可长时间、连续模拟和预测复杂的流域在不同土壤类型、不同土地利用和管理条件下,流域内水分、泥沙和农业化学物质的流失量.介绍了SWAT的发展历程、建模原理、模块功能及其在灌区水资源管理、土地利用管理评价、非点源污染管理等方面的应用前景。

英文摘要：

SWAT （Soil and Water Assessment Tool） is a physically based distributed hydrological and ecological assessment model. It was developed to simulate and predict the water condition, sediment and agricultural chemical yields in large complex watersheds successively under different soils, land use and management conditions over long periods of time. The development Process, modeling principles, module functions of SWAT were briefly introduced, and the applications of the model in irrigation district for water resources management, land management evaluation and non-point source pollution control were demonstrated in this paper.