Analysis Of Temporal And Spatial Evolution Of Ecological Environment In Mining Area Based On Remote Sensing Technology

Mineral resources are the basic material energy for human survival.With the continuous expansion of the scale of industrialization,the demand for mineral resources continues to increase,which leads to the continuous increase in the mining of mineral resources,and triggers a series of ecological and environmental problems in mining areas.Therefore,by studying the temporal and spatial evolution of the ecological environment in the mining area,we can grasp the dynamic development of the ecological environment in the mining area in time,and provide information and decision-making services for the environmental protection,restoration and management and sustainable development of the mining area.This article uses the Malanzhuang mining area in Qian’an City,Hebei Province as the research area,and uses Landsat remote sensing images from 2000 to 2019 as the data source.Based on the normalized vegetation index,the parameters of the pixel binary model are determined,and the vegetation coverage is reversed.To analyze its change characteristics;use the object-oriented decision tree classification method to extract land use types and analyze the land evolution of the Malanzhuang mining area;through investigation and experiment,refer to the actual situation of the Malanzhuang mining area,and use the principal component analysis method.Constructing an improved remote sensing ecological index CRSEI to represent the ecological environment quality of the Malanzhuang mining area,and conducting dynamic monitoring of the ecological environment quality of the mining area,and the following conclusions are obtained:1)The vegetation coverage grade of Malanzhuang mining area has been dominated by high vegetation coverage in 2000,has experienced mainly no vegetation coverage,and now is dominated by medium vegetation coverage.In general,the level of vegetation coverage change in the Malanzhuang mining area has improved more than degraded,and the area of improvement has continued to increase.2)Industrial and mining land has always been the largest land use type in the study area.The area has increased from 1,682.07 hectares to 1,904.43 hectares.During the period,the proportion of the area transferred in and out is relatively large.This shows that the ecological restoration work in the mining area has been in progress,but due to iron ore The amount of mining is large,mining activities continue,resulting in new land occupation,so it is necessary to use a more scientific method to develop iron ore resources and promote the construction of green mines.3)The eco-environmental quality level of the study area has undergone a transition from an excellent level in 2000 to a poor level,and is now restored to a medium level.The average values of CRSEI are 0.53,0.39,0.46,and 0.47,respectively.After 2008,its trend It is increasing,and the ecological environment quality of Malanzhuang mining area is improving in a good direction.Figure 22;Table 20;Reference 82...