Study On The Zoning Method Of Ecological Remediation In The Coal Mining Subsidence Area In The Perspective Of Green Infrastructure

In recent decades,rapid urbanization has led to significant changes in land cover and the shrinking of ecological land area,resulting in a series of increasingly prominent ecological and environmental problems.In order to coordinate the conflict between economic and social development and ecological and environmental protection,the 18th CPC national congress raised the ecological civilization construction to an unprecedented new height.Long-term mining activities make coal cities face more severe ecological and environmental pressure.Landscape fragmentation,pollution diffusion and land occupation caused by coal mining subsidence seriously affect the benign development of urban society and economy.Therefore,it is urgent to carry out ecological remediation in coal mining subsidence areas.However,there are some problems in the practice of ecological remediation in mining subsidence areas,such as the leading of economic benefits and the lack of regional planning,which are not conducive to the realization of the overall regional ecological benefits.Green infrastructure is an interconnected network composed of natural areas and open Spaces.It focuses on the integrity and connectivity of ecological space,which is conducive to the protection of natural resources and the healthy development of urban spatial structure.This paper introduces the concept of green infrastructure and applies the zoning method to the field of ecological remediation.Under the regional background,the potential of coal mining subsidence patches to be transformed into green infrastructure is scientifically evaluated and the zoning is delimited for targeted control and protection.Ecological remediation zoning method is based on ecological importance assessment,The evaluation framework of "ecological importance--landscape connectivity--ecological demand" was proposed based on the patch's own attributes,the improvement needs of green infrastructure and the ecological needs of residents,so as to comprehensively assess the potential of coal mining subsidence patches to integrate into green infrastructure networks.This paper takes the coal mining subsidence area in the core area of Suhuai as an empirical research area.After demonstrating the necessity of ecological remediation and the possibility of integrating into the green infrastructure network,the evaluation framework of "ecological importance--landscape connectivity--ecological demand degree" is applied to carry out the ecological remediation division of the mining subsidence area.Based on the above evaluation results,the mining subsidence area is divided into the conservation remediation area,the recreation remediation area,the blending remediation area,the production remediation area and the construction remediation area by using the three-dimensional puzzle model,and the zoning control strategy is proposed.This paper also compares the zoning plan with the ecological remediation zoning scheme under the two evaluation frameworks of"ecological importance-landscape connectivity" and "ecological importance-ecological demand",and finds "ecological importance,landscape connectivity,ecological demand" ecological remediation Zoning scheme under the framework not only helps to optimize the regional ecological spatial structure,but also better balances ecological and economic benefits..The concept of green infrastructure provides a new perspective for coordinating the ecological remediation of coal mining subsidence areas within the region,and helps to link up the planning of the whole ecological network and the comprehensive rehabilitation planning coal mining subsidence areas.The Zoning method based on the evaluation framework of "ecological importance--landscape connectivity--ecological demand" proposed in this paper enriches the zoning method of ecological remediation in mining subsidence areas,and has certain reference significance for similar cities to carry out ecological remediation zoning and improve the green infrastructure network.The whole thesis contains about 44000 words,52 pictures and charts.