Comprehensive assessment on ecological risk of Hexi Corridor urbanization based on normal cloud model and entropy weight
Gong Yan-bing · Ganhanqu ziyuan yu huanjing · 2012
In order to evaluate the ecological risk degree of the Hexi Corridor urbanization,the ecological risk evaluation model based on the normal cloud model and entropy theory was presented to solve the fuzzy and random problem in the process of urbanization.Three assessment indexes were considered,namely,resources risks,ecological risk,and environmental risk in the process of urbanization.The entropy weight method was used to compute the evaluation factors' weights,and the normal cloud model was used to describe grade of ecological risk under single index.The method keeps the random in evaluation.Finally,a case study was implemented using the method to assess the ecological risk grade of five cities Hexi Corridor.Compared with the fuzzy evaluation method,the model achieves the right evaluation result.