用模糊物元法综合评价环境污染

石油和天然气工业存在着大量污染源，必须对其进行综合治理。对污染程度、污染范围和危害程度进行综合评价，可为污染物治理提供科学依据。但因污染程度、污染范围和危害程度等概念本身存在着模糊性而难以处理，于是提出了模糊物元评价法。该方法的基本思路是：把模糊数学理论与物元分析相结合，根据污染程度、污染范围、危害程度三个主要因素及其相应的次要因素与权重，建立各类复合物元，然后把环境污染各主要因素相应权重下模糊量值的平均值、最大值和最小值一同作为评价指标，构成评判复合模糊物元。以某市郊运河发生的一起环境污染事故为例，结果表明了模糊物元评价方法的有效性。

COMPREHENSIVE EVALUATION ON ENVIRONMENTAL POLLUTION BY FUZZY MATTER-ELEMENT METHOD

There are a lot of pollutant sources in oil and natural gas industry. They should be tackled in a comprehensive way in no time. The comprehensive evaluation of polluted extent, polluted range and damaged extent can provide scientific foundation for pollutants control. However, an evaluated method of fuzzy matter-element is presented because the concepts of polluted extent, polluted range and damaged extent themselves are fuzzy. The basic thinking of this method is to combine fuzzy analysis with matter-element analysis, build up several kinds of composite matter-element according to the three main factors----polluted extent, polluted range and damaged extent and corresponding secondary ones and their weights, and then take mean and maximum and minimum of the value of fuzzy parameter corresponding to the weights of the main factors of environment pollution as evaluation indexes at the same time and make evaluated composite fuzzy matter-element. Take an accident of environment pollution occurred in the suburbia canal in certain county as an example, results have shown effectiveness of the method.