The Evaluation Of Ecological Vulnerability Basing GIS

Ecological environment is the basic of the human being's surviving and developing.Because of the rapid increasing of the population and the irrational use of the resources, the own coordination capacity of the ecosystem decline and the survival environment of the human being shows a trend of more and more fragile.vulnerability is a major problem which the human being must face and have a urgent need to study and solve.Exploitation of mineral resources is the human activity which damages the land ecosystem.Engineering measures will lead a certain degree of negative impact on the soil properties,biodiversity and ecosystem stability.Land reclamation is an ecological restoration to the impact of mining exploitation.In order to evaluate the study area before and after mining and land reclamation after the eco-environment changes in vulnerability,a mathematical model is inducted in this paper for a quantitative calculation.To some extent,mining exploitation underminded the regin's ecological environment,land reclamation improved the regional ecological environment.This paper is divided into five major parts:The first part is the introduction.It explains the paper research background;the present situation of domestic and foreign ecological vulnerability research object;and it identified the purpose,significance and the overall outlook in the study.The second part is the ecological environment vulnerability theory.By summing up the basic concept and analyzing the reason which makes the fragile ecological vulnerability and analyses the characteristics and types of the fragile ecological environment.The third part mainly the overview of the natural environment,engineering and socio-economic conditions in the study area and analyzes the formational reasons and performance results.The forth part is ecological vulnerability assessment modeling.With the Pingshuo mining area to be the evaluation target,the theoretical study of Eco-environment being the basis,the cause-results of system performance indicators being the conceptual framework for the indicators,it selectd the evaluation indicators such as sub-systems of natural social development subsystem,ect.And it introduces the orgin and processing the data resource of the evaluation factors and establishes a vulnerability assessment model.Finally,the paper discusses and explains the ecological fragile results in the study area before and after mining and land reclamation.The fifth part is the conclusions and prospects.This part summarizes the main results and conclusions of innovation,research and absence.Then the direction for further research is pointed out.