Study On Land Use Vulnerability And Ecological Reconstruction In Coal Mining Area Of Hegang City

Land system as an important measure of the coupling relationship between human and land,the research has become a hotspot in global.As a special urban group,coal city has a typical vulnerability characteristic under the combination of natural factors and human activities.Based on the remote sensing(RS)and geographic information system(GIS)technology,this paper takes the land use of the coal mining area in Hegang City from 1994 to 2014 as the research object,the five remote sensing images and statistical data,and uses the spectral characteristics and texture analysis.(SVVI)is used to extract the land use classification from the perspective of ecology,economy and society.The vulnerability evaluation model is constructed based on the sensitivity,the exposure degree and the adaptability.The vulnerability evaluation model is constructed by using the support vector machine(SVM)The AHP method was used to establish the vulnerability evaluation system and the weights of 27 evaluation indexes were obtained.The spatial and temporal scales of land use in coal mining area were evaluated by GIS spatial analysis method and the suitable ecological Reconstruction model optimization strategy.The results show that:(1)The land use vulnerability of coal mining area in Hegang City from 1994 to 2014 is increasing constantly.Under the disturbance of human activities,the change and destruction of coal land,unused land and residential land directly or indirectly lead to land use(2)Under the disturbance of natural factors and human factors,the adaptability of land use in the study area is becoming more and more unstable,and the land use is more and more obvious.The use of the environment in the sensitivity,the dual role of exposure from the potential vulnerability to the extreme vulnerability of the trend,the ecological environment is exacerbated in the state.Therefore,according to the land use vulnerability of Hegang coal mining area,the paper puts forward the optimization measures of cultivated land protection facilities,grassland vegetation remodeling and biodiversity conservation,so as to provide effective guidance plan and sustainable development strategy for coal mine urban ecological problems.