基于RS和GIS的淮河上游山丘区土地利用方式与土壤侵蚀强度的研究

在ArcGIS9软件的支持下,采用叠加分析方法,对淮河上游山丘区1995～2000年的土地利用方式变化和土壤侵蚀强度变化的关系进行了探讨.结果表明,淮河上游山丘区土地利用方式变化总体上是有利于水土保持、土壤侵蚀面积减少和侵蚀强度降低的;土壤侵蚀强度变化主要发生在水田、旱地、林地、草地这4种土地利用方式中,其中林地土壤侵蚀强度有较为明显的下降;不同土地利用方式之间的转化对土壤侵蚀变化的影响主要体现在耕地变为林地和建设用地对土壤侵蚀的抑制上.

Research of land use and soil erosion in upstream massif area of Huaihe river basin based on RS and GIS

In the support of the software of ArcGIS9,the method of overlay analysis was used to discuss the relations between the changes of land use and soil erosion in the massif region of upstream of the Huaihe river from the year of 1995 to 2000.The results showed that the changes of land use had a great effect on conservation of water and soil generally.The regions where the intensity of soil erosion have changed mainly occurs in these four types of land use,such as the paddy field,the arid land,the forest land and the lawn.Among them,the intensity of soil erosion had a drop obviously in the type of the forest land;The transformation among different types of land use had influence to the changes of soil erosion.The influence mainly reflected in the reduction of the soil erosion due to the transformation of farming land to forest land and construction land.