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首页> 外文会议>International Conference on Geoinformatics;Geoinformatics 2012 >RISK ASSESSMENT OF SOIL EROSION AND EFFECTS ON SOIL NUTRIENTS IN RED ERODED SOIL OF SOUTH CHINA
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RISK ASSESSMENT OF SOIL EROSION AND EFFECTS ON SOIL NUTRIENTS IN RED ERODED SOIL OF SOUTH CHINA

机译：中国南方红色侵蚀土壤侵蚀的风险评估及对土壤养分的影响

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Soil erosion which endangers the human survival and development has been an important environmental problem around the world for a long time. The complexity and diversity presents in Zhuxi Small Watershed which is one of the thirty typical monitoring watersheds in China. The information which include rainfall, slope, soil, vegetation and land use, was obtained by combining 3S techniques with field investigation and the evaluation model on soil erosion risk was established by using these data. The soil erosion risk was divided by 5 types, including micro-degree risk, light risk, moderate risk, high risk and violent risk, and the distribution map of soil erosion risk was compiled also. The results showed that: Light risk and moderate risk were the main types and their area proportion was above 90%, areas of high risk and violent risk accounted for only 6.72% and 0.2% respectively, it could be inferred that ecosystem was not very vulnerable and unreasonable human activities could be the main reasons for the strong soil erosion in this region. Soil erosion risk type was the dominant factor affecting the contents of soil nutrients which could decrease soil nutrient contents Comparisons with field investigation showed that the result was in conformity with actual conditions proving the reasonability and applicability of the evaluation model.
机译：长期以来，危害人类生存和发展的水土流失一直是世界范围内的重要环境问题。竹溪小流域的复杂性和多样性是中国三十个典型的监测流域之一。通过将3S技术与野外调查相结合，获得了包括降雨，坡度，土壤，植被和土地利用的信息，并利用这些数据建立了土壤侵蚀风险评估模型。将水土流失风险分为微观风险，轻度风险，中度风险，高风险和暴力风险5种类型，并编制了水土流失风险的分布图。结果表明：以轻度风险和中度风险为主要类型，其面积比例在90％以上，高风险和暴力风险区域分别仅占6.72％和0.2％，可以推断生态系统不是很脆弱。人类不合理的活动可能是该地区水土流失严重的主要原因。土壤侵蚀风险类型是影响土壤养分含量的主要因素，可能降低土壤养分含量。与田间调查的比较表明，结果符合实际情况，证明了评价模型的合理性和适用性。

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