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土壤侵蚀调查与评价是水土保持工作的重要组成部分。该文对区域土壤侵蚀评价进行了尝试性研究,提出一种基于模糊神经系统和GIS技术的快速评价方法。研究中利用模糊神经系统技术从地面监测调查数据中提取土壤侵蚀强度的评价规则,建立能够全面、客观地反映特定区域范围内土壤侵蚀自然特征及规律的评价标准,在此基础之上结合GIS技术以实现对整个地区的快速评价。采用该方法进行湖北省土壤侵蚀普查,结果表明全省侵蚀面积约占国土总面积的30.1%。其中,鄂西南、鄂西北高山区土壤侵蚀情况最严重,鄂东南、鄂东北低山丘陵区次之,鄂北岗地中度侵蚀面积较大,而江汉平原基本无明显侵蚀。经验证评价结果与实际情况具有较好的一致性。
Soil erosion survey and evaluation is an important part of soil and water conservation. This paper makes a tentative study of regional soil erosion evaluation and proposes a rapid evaluation method based on fuzzy neural system and GIS technology. In the study, the evaluation rules of soil erosion intensity were extracted from the surface monitoring survey data using the fuzzy neural system technology, and the evaluation criteria were established to reflect the natural features and laws of soil erosion in a specific and comprehensive range objectively and objectively. On this basis, In order to achieve a rapid assessment of the entire region. The method of soil erosion survey in Hubei Province, the results show that the erosion area of the province accounts for about 30.1% of the total land area. Among them, the soil erosion was the highest in the high mountains of southwestern Hubei and northwestern Hubei Province, followed by the erosion in the hilly area of southeastern Hubei and northeastern Hubei and the hilly area of northern Hubei and the erosion of the Jianghan Plain. Validated evaluation results and the actual situation has good consistency.