Analysis Of Land Use Landscape Pattern And Construction Of Ecological Security Pattern In Mining Cities

Long time,large-scale and high-intensity mining activities have a significant impact on the change of land use landscape pattern,and a series of ecological and environmental problems seriously threaten the regional ecological security pattern and sustainable economic development.Therefore,analyzing the evolution characteristics and future development trend of land use landscape pattern from a qualitative and quantitative perspective and constructing an ecological security pattern has important practical guiding significance for mining cities to formulate scientific and effective land reclamation schemes,scientifically plan the zoning layout of ecological restoration and build an eco-friendly city.Taking Huaibei City,a typical mining city,as the research area,this paper analyzes the evolution characteristics of land use landscape pattern from the perspective of land use quantity,dynamics,transfer and landscape index change,mainly based on land use data in 2000,2010 and 2020,supplemented by vector and grid data such as DEM and basic geographic data,combined with geographic information technology and landscape ecology theory;With the help of logistic regression model,FLUS model and MCR model,this paper analyzes and forecasts the future evolution trend of land use,constructs the current situation and ecological security pattern of Huaibei City in the future,divides the ecological security level,and puts forward planning and governance suggestions.The specific research results and conclusions are as follows:It is determined that the optimal landscape granularity of Huaibei City and urban mining areas are 40m and 25m respectively.The main land use types in Huaibei City and mining areas from 2000 to 2020 were cultivated land,construction land and water area.Among them,the land use change was the most drastic from 2010 to 2020,which was mainly reflected in the sharp decrease of cultivated land and the significant increase of construction land,water area and forest land,which was related to the rapid expansion of economy,the implementation of policies such as returning farmland to forest and barren mountain greening and the damage of cultivated land caused by mining activities.During this period,the newly added water area is mainly concentrated in Suixiao and Linhuan Mining Areas in Huaibei City,and the reduced cultivated land is mainly transferred to construction land,water area and forest land.From 2000 to 2020,the SHDI,SHEI and DIVISION indexes of Huaibei City and mining area increased,while the CONTAG,AI and COHESION indexes decreased,indicating that the landscape types are becoming richer and richer,gradually developing towards diversity and balance,and the landscape pattern is gradually developing towards fragmentation and low connectivity.100m is determined as the best simulation scale.According to the Exp(B)coefficient of various land use types and driving factors,it is found that available nitrogen,phosphorus and potassium and organic matter have a significant impact on the distribution of cultivated land,accessibility factors mainly affect the distribution of construction land,forest and grassland,and socio-economic factors mainly affect the distribution of cultivated land and construction land.The FLUS model is trained and verified,and the calculated kappa coefficient is 0.827,which shows that the model meets the accuracy requirements.Based on this,simulating the land use evolution trend from 2030 to 2040,it is found that the largest area change is still cultivated land,water area and construction land,and the change of forest land and bare land is not obvious and relatively stable.According to the resistance threshold method,the ecological security of Huaibei City is divided into high,medium,low and other levels.The resistance of ecological expansion in the high safety zone is the smallest,mainly based on natural mountains and rivers;The middle safety zone has less ecological resistance and is an important natural protection barrier,bordering on natural mountains,rivers and mines;The ecological expansion resistance of the low safety zone is large,which is mainly distributed around the mining area;Other areas have the least resistance to living expansion,mainly farmland and construction land,with a certain development intensity.From 2020 to 2040,the area of low safety zone expands fastest,and the area of medium safety zone and other areas decreases.This change is related to the continuous damage of mining activities to the surface.Figure 25 Table 22 Reference 92...