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基于遥感(RS)和地理信息系统(GIS)技术,选取黄土高原西部宁夏中卫地区作为主要研究区,在综合考虑研究区的NDVI、地形、土壤类型、降雨量等数据资料的基础上,结合RUSLE模型定量评估研究区2016年的水土流失量和土壤侵蚀强度并进行空间分析。研究结果表明:研究区土壤侵蚀总面积约为9 759.61 km2,平均土壤侵蚀模数为1 290.18 t/km2·a,其中微度侵蚀、中度侵蚀和强度侵蚀占比分别为71.8%、16.0%和12.2%;侵蚀较为严重的地区主要分为三部分:南部丘陵沟壑地区、西北部与东北部的黄河流域附近,以及坡度大于10°的地区。
Abstract：Supported by GIS and remote sensing technologies,a small area in the western part of the Loess Plateau was selected as the main study area in this paper. Based on NDVI,topography,soil type,rainfall and other data in the study area,adapted the revised general soil erosion model( RUSLE),quantitative assessment of soil erosion and soil erosion intensity in the study area in 2016 with spatial analysis are conducted. The results show that the total area of soil erosion in the study area is about 9 759 km2,and the average value of soil erosion modulus is 1 290 t/km2·a,among which the degree of micro-erosion,moderate erosion and intensity erosion are 71. 8%,16. 0% and 12. 2%,respectively. The areas with more serious erosion are mainly divided into three areas as the hilly and gully region in the south,the vicinity of the Yellow River,and the region with a slope greater than 10° in the northwest and northeast.
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基本信息:
DOI：10.16239/j.cnki.0468-155x.2020.05.009
中图分类号:S157;S127
引用信息:
[1]郭达,宋小宁,董震,等.基于RUSLE与GIS的黄土高原水土流失评价研究——以宁夏中卫地区为例[J].泥沙研究,2020,45(05):55-60.DOI:10.16239/j.cnki.0468-155x.2020.05.009.
基金信息:
中国科学院战略性先导科技专项(A类)(XDA20050103);; 国家重点研发计划项目(2016YFC0501800)
2020-08-25
2020-08-25
2020-08-25