【摘要】 采用假设情景法构建了情景1城市用地扩张和情景2生态退耕2种东辽河流域土地利用/覆被变化情景，结合GIS手段与SWAT模型分析了不同情景对流域土壤侵蚀的影响。结果显示：与基准期相比，情景1模式下，土壤侵蚀面积均呈增加态势，其中中度侵蚀面积增幅达34%,且旱地与乡镇用地土壤侵蚀强度指数分别超过基准年的6%、21%。情景2模式下，土壤侵蚀面积及强度缩减比例均在3%以上。结果表明：东辽河流域内城市化进程的加快会造成土壤侵蚀面积增加，而植被盖度的提高能有效控制流域土壤侵蚀的发生发展。研究结果可为东辽河流域土地利用规划和水土流失防治工作提供科学参考。更多还原

【Abstract】 Two scenarios of land use/cover change in the East Liaohe River basin, scenario 1 urban land expansion and scenario 2 ecological conversion, were constructed by using the hypothesis scenario method, combined with GIS and SWAT model. The effects of different scenarios on soil erosion were analyzed. The results showed that compared with the base period, the soil erosion area increased under scenario 1, and the moderate erosion area increased by 34%, and the soil erosion intensity index of dry land and township land exceeded 6% and 21% of the base year respectively. In scenario 2, soil erosion area and intensity decreased by more than 3%. The results show that the acceleration of urbanization in the East Liaohe River basin will increase the area of soil erosion, and the increase of vegetation coverage can effectively control the occurrence and development of soil erosion. The results will provide scientific reference for land use planning and soil erosion control in East Liaohe River Basin.更多还原