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基于RS、GIS技术平台,以修正通用土壤侵蚀方程(RUSLE)为基础,探讨降雨、土壤、地形、植被等因子对土壤侵蚀敏感性的影响,建立桐柏大别山区土壤侵蚀敏感性评价指标和分级标准,分析评价土壤侵蚀敏感性,为桐柏大别山区土壤侵蚀防治和生态工程建设提供科学依据。结果表明:桐柏大别山区土壤侵蚀敏感性较高,中度及中度以上敏感面积占总面积的46.34%,轻度敏感和不敏感区分别占总面积的44.30%和9.36%;在空间分布上,土壤侵蚀敏感性呈由南向北减弱特征,敏感性较高的区域主要分布在金寨县、霍山县、岳西县、舒城县、商城县等中南部山区县,而北部平原区敏感性较低;土壤侵蚀敏感性分布与土壤侵蚀强度具有较高的一致性,即土壤侵蚀敏感性高的区域也是目前土壤侵蚀严重的区域,表明区域土壤侵蚀受自然因素影响很大,但在局部地区由于人类活动干扰不同则存在一定的差异。
Based on RS and GIS technology platform, based on the revised RUSLE, the effects of rainfall, soil, topography and vegetation on the soil erosion sensitivity were discussed, and the evaluation index and classification of soil erosion sensitivity in Dabie Mountain of Tongbai area were established Standard, analyze and evaluate the sensitivity of soil erosion, and provide scientific basis for soil erosion prevention and ecological engineering construction in Tongbai Dabie Mountain area. The results showed that soil erosion was more sensitive in Dabie Mountain area of Tongbai and accounted for 46.34% of the total area, while mildly sensitive and insensitive areas accounted for 44.30% and 9.36% respectively of the total area. In spatial distribution , The sensitivity of soil erosion decreased from south to north, and the areas with higher sensitivity were mainly distributed in mountainous counties in central and southern Jinzhai, Huoshan, Yuexi, Shangcheng, etc., while the northern plains And the sensitivity of soil erosion is relatively low. The distribution of soil erosion sensitivity is in good agreement with soil erosion intensity, that is, the area with high soil erosion sensitivity is also the area with severe soil erosion, indicating that the soil erosion is greatly affected by natural factors. However, In some areas, there are some differences due to the differences in human activities.