Application Of Fuzzy Comprehensive Evaluation Method Based On Gini Coefficient Weight In Soil Environmental Quality Assessment

Soil heavy metal pollution assessment is an important part of soil environ-mental quality research.Heavy metals are highly toxic and easy to accumulate in the soil;they have a high degree of harm,long lasting time and other cha-racteristics;they can be concentrated in the soil or organisms.When the soil heavy metal content accumulates to a certain extent,it is possib-le to harm soil environment and creatures around,and they even enter into th-e human body to endanger human health.Therefore,constructs a reasonable evaluation model by using the scientific method of soil environmental quality evaluation,and evaluates the soil environmental quality in the study area objectively and accurately,not only can understand the status of heavy metal pollution in the study area,identify the degree of damage to heavy metals,but also for the local soil heavy metal pollution control,crops,fruit cultivation and agricultural production planning,to provide scientific guidance and reasonable recommendations.This paper first introduces the basic principle of fuzzy comprehensive evaluation method,the specific content,from the selection of subordinate degree function,determining weight,fuzzy selection operator of fuzzy comprehensive evaluation method for further research.Recognize the weights allocation plays an important role in the process of fuzzy comprehensive evaluation,and noticed in the application of fuzzy comprehensive evaluation method to evaluate soil environmental quality in the process,the chroma of the most common method to determine the weight of the existed defects and insufficiency in the,try to describe said internal evaluation object relations of chroma of gini coefficient method and method,combining the advantages of providing a new thought of empowerment.Secondly,the acquisition of soil heavy metal content in the studied area data statistical analysis,this paper studies the degree of centralization or decentralization of heavy metal element and space distribution,provide the basis for soil environmental quality assessment.Finally,the application of the improved fuzzy comprehensive evaluation method for comprehensive evaluation of soil environmental quality research in the study area,the mastery of the soil heavy metal pollution condition in the study area,or the harm degree,divides the soil environmental quality grade,combine theory and practical application,good results have been achieved.Study shows that by using the gini coefficient of empowerment concentration standard method to determine the initial weight amended,revised weight reflect more comprehensive information,not only can reflect the influence degree of the single pollution factor of comprehensive pollution,also can reflect the overall relationship between multiple evaluation objects,with the improved after weight fuzzy comprehensive evaluation method to evaluate soil environmental quality,to further ensure validity,reliability and accuracy of evaluation results.