基于GIS与RUSLE的土壤侵蚀量时空变化分析  

Spatio-temporal Change Analysis of Soil Erosion Based on GIS and RUSLE

作　　者：李雪莹[1] 杨俊[2] 杨阳[1] 王雪[3] 

机构地区：[1]北京师范大学地理学与遥感科学学院,北京100875 [2]辽宁师范大学城市与环境学院,辽宁大连116029 [3]北京师范大学减灾与应急管理研究院,北京100875

出　　处：《地理空间信息》2016年第4期65-69,11,共5页Geospatial Information

基　　金：国家自然科学基金资助项目(4047017);国家大学生创新创业训练计划资助项目(201310165011)

摘　　要：基于修正的土壤流失方程（RUSLE）,运用RS 和GIS 技术对葫芦岛市的土壤侵蚀状况进行分析.结果表明,葫芦岛市年均土壤侵蚀量17 867 598.32 t,年均土壤侵蚀模数为16.13 t/（hm^2×a）,属于轻度侵蚀.葫芦岛市中度侵蚀以上的土壤侵蚀面积占总侵蚀面积的11.31%,土壤侵蚀模数占总侵蚀量的40.17%.中度侵蚀以下的土壤侵蚀面积占总侵蚀面积的88.96%,土壤侵蚀量占总侵蚀量的59.83%,研究区土壤侵蚀空间差异性大.分析土壤侵蚀与坡度和土地利用之间的关系表明,6°-25°为研究区主要侵蚀坡度段,裸土地、旱地、林地和草地是研究区土壤侵蚀的主要发生区,葫芦岛市应将其列为水土保持重点治理对象,采取有效措施,改善土壤侵蚀现状.In the study, based on revised universal soil loss equation(RUSLE), we used RS and GIS to analysis the annual average amount of soil erosion of Huludao City. The results show that the annual average amount of soil erosion of Huludao City is 17 867 598.32 t, and soil erosion modulus of that area is 16.13 t/(hm2·a), and erosion intensity is on the mild level. In 88.96% of research area, the regional soil erosion intensity is below moderate level, and the contribution rate of the amount of soil erosion of research area is 59.83%, while other area above moderate level is 40.17%. The spatial diversity of regional soil erosion is intense. Analyzing the relationship between soil erosion, slope and land utilization, the results show that the slope between 6 degrees and 25 degrees is divided into the major erosion slope section, and bare lands, arid land, meadow and forest land are divided into major erosion area, which are suggested to be listed into focus on soil and water conservation.

关 键 词：土壤侵蚀 RUSLE GIS 葫芦岛市 

分 类 号：P273[天文地球—测绘科学与技术]