Research on Ecological Environment Evaluation of Agricultural Land Based on PSR and Cloud Theory
Yu Lian · 自然资源学报 · 2011
In view of the status quo that few researches have been made on ecological environment evaluation of agricultural land,this paper adopts PSR framework to construct index system of evaluation,and employs the cloud theory to establish cloud models of quantitative indexes and qualitative indexes respectively so as to evaluate ecological environment of agricultural land.Taking Xinxing County as an example,the evaluation score is 0.75 representing good ecological environment in Xinxing.The result is reasonable and conforms to the current situation in Xinxing.Compared with fuzzy rules,evaluation scores are 0.75 and 0.70 respectively,showing no obvious difference.However,the results reveal that the cloud theory has the capacity to express the uncertainty completely existed in the process of evaluation and can avoid the complex procedures of choosing membership functions when fuzzy rules are constructed.