逼近于理想解的排序法在输变电工程土壤侵蚀等级划分中的应用

Application of Technique for Order Preference by Similarity to Ideal Solution Method to Grade Division of Soil Erosion in Construction Projects of Power Transmission

在分析土壤侵蚀影响因子的基础上,采用植被覆盖率、地面坡度、沟谷面积占坡面面积比、沟谷密度、崩塌面积占坡面面积比5个因素作为评价特征指标,建立了基于逼近于理想解的排序法(TOPSIS法)的土壤侵蚀等级划分的综合评判模型,并根据评判结果确定了土壤侵蚀等级。以某输变电工程建设开发项目为案例对该模型进行了实证研究。结果表明,该方法原理简单,计算简便,评价结果合理,可为相关部门制定水土保持规划和治理措施提供依据。

Through the analysis of soil erosion factors,a comprehensive evaluation model for grade division of soil erosion based on the technique for order preference by similarity to ideal solution（TOPSIS）was established by selecting vegetation coverage,surface slope,area ratio of valley to slope,gully density,and area ratio of collapse to slope as evaluation indexes.The grade division of soil erosion was then made according to the evaluation.An empirical study was conducted by taking the development and construction projects of power transmission for an example.Results show that the TORSIS model is simple and convenient,and the result is reasonable.It provides a basis for the relevant departments to develop soil and water conservation planning and its control measures.