中文摘要：

以汉江流域为研究区，在GIS技术支持下，应用分布式模型SWAT（Soiland Water AssessmentT001）进行了流域产水产沙模拟。采用1987—1996年的资料进行模型率定，1997-2001年的资料进行模型检验，在此基础上，给出了汉江上游泥沙侵蚀量的空间分布图，分析了产沙量和植被／土壤类型、地表径流量以及地形的关系。结果表明汉江上游北岸丹江片区的泥沙侵蚀量最为集中，汉江上游流域产沙的空间分布主要取决于地表径流的空间分布和地形因素的变化，而植被覆盖／土壤类型对产沙量的影响较小。研究表明SWAT模型可以应用于与径流相关的各种模拟分析并对流域长期连续泥沙负荷模拟具有较好的适用性，研究成果对汉江流域的土壤侵蚀综合治理和进一步开展考虑南水北调中线工程的汉江流域综合管理具有重要参考价值。

英文摘要：

The spatial-temporal distribution of runoff generatin and sediment yield in Hanjiang River Basin is investigated by coupling GIS and the distributed basin hydrological model-SWAT （Soil and Water Assessment Tool）. The data from 1987-1996 and 1997-2001 are respectively used for the validation and calibration of the model. The spatial distribution map of runoff generation and sediment erosion in Hanjiang basin is built, and the relationship between the sediment erosion and land cover, soil texture, surface runoff and landscape is discussed. The results show most sediment erosion yield is concentratedin the northern bank nearing Dan River, and the distribution of sediment yield is mainly determined by the surface water yield and topography condition, but the impact of vegetation cover/soil tecture is not obvious. This research showes the applicability of SWAT model in runnoff generation and long-term sediment load simulation and provided the valuable suggestions for the conservation of soil and water in Hanjiang river basin, and the integrated water sources management for the Middle Route of South-North Water Diversion Project.