榆林市土地利用格局及土壤侵蚀特征分析

Analysis of Land Use Patterns and Soil Erosion Characteristics in Yulin City

准确识别土地利用变化及土壤侵蚀特征对土地资源的合理利用有重要意义。以陕西省榆林市为研究对象,分析2000—2018年土地利用的时空变化特征,评估其土壤侵蚀变化情况。研究结果表明:榆林市土地利用变化的幅度较为明显,变化幅度较大的是建设用地和耕地。中度侵蚀面积最大,极强烈和剧烈侵蚀面积占比均增加。土地利用分类下的土壤侵蚀特征:以草地和耕地的中度侵蚀为主;未利用地侵蚀有增强趋势。该研究可明晰研究区土壤侵蚀的变化,为研究区土地利用研究提供支持。

Accurate identification of land use change and soil erosion is of great significance to the rational utilization of land resources. Taking Yulin City of Shaanxi Province as the research object, the spatial-temporal characteristics of land use change from 2000 to 2018 were analyzed, and the changes of soil erosion were evaluated. The results show that the range of land use change in Yulin is more obvious,and the larger range of change is the construction land and cultivated land. The area of moderate erosion was the largest, and the proportion of extremely intense and intense erosion areas increased. The characteristics of soil erosion under land use classification were as follows: moderate erosion of grassland and arable land;the erosion of unused land tends to increase. This study can clarify the changes of soil erosion in the study area and provide support for land use research in the study area.