熵权系数法在土壤环境质量评价中的应用

根据信息论中熵的概念,分析土壤环境评价中各因素提供的信息,计算出各评价指标的权值,得到土壤环境评价的综合指标值,最终确定土壤环境评价的等级。熵的引入避免了主观因素的干扰,可看出与标准等级的接近程度;在同等条件下,与其他土壤环境评价方法相比,可看出熵权系数法的评定结果准确度较高。实例分析表明,该评价方法简单易行,评价结果符合实际情况。

Application of Entropy Weight Coefficient Method in Environmental Assessment of Soil

Entropy weight coefficient method was applied to build evaluation model of soil environment to effectively reduce the influences of subjective factors to determine the weight.The influence of every factor in the environmental assessment of soil was analyzed by entropy,and the weight value of evaluation index was worked out and the environmental assessment’s comprehensive index value was obtained.Grade of environmental assessment of soil and the degree of closeness of measured value were obtained by the analysis of comprehensive index value.Entropy weight coefficient method and the others methods were compared.The results showed that entropy weight coefficient method had high accuracy.The above sample analysis demonstrated that the evaluation method was simple and feasible,and the evaluation results were in conformity with the actual situation.