Monitoring Of Vegetation Change In Mining Area Based On Multi-source Remote Sensing Data

Fengfeng mining area is located in the south of Hebei Province with abundant coal resources.Due to the long-term development of resources,the ecological environment and living environment of Fengfeng mining area have been greatly damaged.Since 2014,many parties have invested a large amount of money to carry out restoration and treatment,which has achieved certain results.However,Fengfeng mining area still faces many challenges due to its long construction history,many environmental debts,great difficulty in treatment,single monitoring means,and inaccurate grasp of the current situation information.In particular,it is urgent to find out the law of environmental damage and pollution in the mining area systematically,Only in this way can we lay a foundation for the follow-up suggestions of scientific restoration and governance.In this thesis,combined with Remote Sensing and GIS technology,through the selection of long-time series of multi-source remote sensing data,the change of ecological environment in Fengfeng mining area and its surrounding areas in recent 20 years was analyzed,and the impact of coal mining on the natural ecological environment such as vegetation around the mining area is systematically analyzed,so as to get the change trend of vegetation coverage in the mining area under the disturbance of coal mining,It provides data and technical support for the follow-up restoration and governance of the mining area.Based on the data of Landsat and GF-1 in 2001-2020 years,the trend of vegetation coverage in Fengfeng mining area was systematically studied.The spatial autocorrelation,stability and future trend of the vegetation are predicted.Meanwhile,the influence of Wutong Zhuang and Wan Nian mining on vegetation disturbance was discussed.The main research results are as follows(1)From 2001 to 2020,the vegetation coverage in Fengfeng mining area shows an upward trend.The vegetation coverage in the northwest and southeast of Fengfeng mining area was relatively high,while that in the central area was relatively low.The vegetation coverage in the northwest and southeast of Fengfeng mining area has always been relatively high.From 2001 to 2020,the vegetation coverage classification grades of Fengfeng mining area are mostly medium high vegetation coverage and high vegetation coverage,that was to say,the vegetation coverage types of Fengfeng mining area are mainly low shrubs and trees.In the evolution trend of vegetation coverage,the order of area size is: slight improvement,basically unchanged,moderate improvement,obvious improvement,slight improvement,moderate degradation and serious degradation,and the area of improvement trend is obviously larger than that of degradation trend.In terms of spatial autocorrelation,it has high spatial aggregation,that is,the adjacent areas of high vegetation coverage areas are mostly high vegetation coverage areas,and the adjacent areas of low vegetation coverage areas are mostly low vegetation coverage areas.(2)Based on buffer analysis,the main influence area of the mining of Wutong Zhuang and Wan Nian on the surrounding vegetation has a decreasing trend.(3)In terms of the stability of vegetation coverage,the stability of vegetation coverage in Fengfeng mining area from 2001 to 2020 was relatively high.In terms of change trend,the future change trend of vegetation coverage in the study area is mostly opposite to the past change trend,especially a large area will change from improvement to degradation.