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根据彭州市独特的自然地理特征,结合美国通用土壤流失方程(USLE),选择降雨侵蚀力(R)、土壤可蚀性(K)、坡度坡长(LS)和地表覆盖(C)4个自然因子作为彭州市土壤侵蚀敏感性评价的指标,在GIS和RS技术支持下,对彭州市土壤侵蚀敏感性并进行综合评价。结果表明:彭州市土壤侵蚀敏感性以不敏感(37.78%)、轻度敏感(19.22%)和极敏感(22.09%)为主,中度敏感(10.57%)和高度敏感(10.33%)比例相对较小;区域内土壤侵蚀敏感性的空间分布具有垂直地带性,其中最不敏感区主要分布在东南平原地区,极敏感区主要分布在北部坡度大于25°的亚高山、低山和深丘地区。研究结果将为区域内土壤侵蚀状况的宏观把握和水土保持政策的制定提供科学依据。
According to the unique natural geography characteristics of Pengzhou City and the US common soil loss equation (USLE), we selected four natural (R), soil erodibility (K), slope slope length (LS) and surface coverage As an indicator of soil erosion sensitivity in Pengzhou, GIS-RS was used to evaluate the sensitivity of soil erosion in Pengzhou to comprehensive evaluation. The results showed that the soil erosion sensitivity of Pengzhou was mainly insensitive (37.78%), light sensitive (19.22%) and extremely sensitive (22.09%), moderately sensitive (10.57%) and highly sensitive (10.33%) The spatial distribution of soil erosion sensitivity in the region is vertical zonation. The least sensitive regions are mainly distributed in the southeast plains, and the most sensitive regions are mainly distributed in the subalpine, low mountain and deep hill regions whose northern slope is greater than 25 ° . The results will provide a scientific basis for macro-control of soil erosion and formulation of soil and water conservation policies in the region.