基于模糊证据权模型的长汀县水土保持措施适宜性评价

发布时间：2019-07-10 09:15

【摘要】：在水土保持措施的适宜性评价中,评价因子的选取和权重的确定是值得探讨的问题。为避免因子选取和权重确定的主观随意性,引入集知识和数据驱动为一体的模糊证据权模型。以福建省长汀县封禁措施为研究对象,选取自然适宜性和社会适宜性2方面共7个因子,综合各因子参数计算后验概率,得到长汀县水土保持措施适宜性分级图。结合2014—2015年封禁措施分布情况进行分析,结果表明:高度适宜占38.5%,中度适宜占43.5%,一般适宜占9.2%,中度适宜级别以上占82%,与实际情况有较高的吻合性。这说明模糊证据权模型能够客观、准确地对水土保持措施进行适宜性评价,可以为政府配置水土保持措施提供决策参考和理论依据。
文内图片：

图片说明：模糊证据权模型评价主要步骤Fig．1Mainstepsoffuzzyweight-of-evidenceevaluation素
[Abstract]:In the suitability evaluation of soil and water conservation measures, the selection of evaluation factors and the determination of weight are worthy of discussion. In order to avoid the subjective arbitrariness of factor selection and weight determination, a fuzzy evidence weight model which integrates knowledge and data drive is introduced. Taking the sealing measures of Changting County in Fujian Province as the research object, seven factors of natural suitability and social suitability were selected, and the posterior probability was calculated by synthesizing the parameters of each factor, and the classification map of suitability of soil and water conservation measures in Changting County was obtained. Combined with the distribution of ban measures in 2014 / 2015, the results showed that the high suitability accounted for 38.5%, the moderate suitability accounted for 43.5%, the general suitable rate was 9.2%, and the moderate suitable grade or above accounted for 82%, which was in good agreement with the actual situation. This shows that the fuzzy evidence weight model can objectively and accurately evaluate the suitability of soil and water conservation measures, and can provide decision-making reference and theoretical basis for the government to allocate soil and water conservation measures.
【作者单位】：福州大学福建省空间信息工程研究中心;福州大学地理空间信息技术国家地方联合工程研究中心;福州大学空间数据挖掘与信息共享教育部重点实验室;
【基金】：国家科技支撑计划项目(2013BAC08B02)
【分类号】：S157

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