Study On Landscape Evaluation And Regeneration Design Strategy Of Abandoned Mining Areas

Abandoned mining area is a kind of ecosystem which is forced to degenerate.Mining development activities may damage its topography and landform,but it may also form a unique geological landscape,which itself is a record and reproduction of the progress of human science and technology and the process of civilization change,which makes many abandoned mining areas have the potential to develop into geological heritage parks.The landscape quality of abandoned mining areas can be reflected by landscape evaluation.The significance of landscape evaluation lies in protecting existing landscape resources,excavating new landscape space,and providing scientific suggestions for future landscape development and management.This paper explores the feasible ways of landscape evaluation in abandoned mining areas from both theoretical and practical aspects.Firstly,in view of the particularity of landscape composition in abandoned mining areas,on the basis of traditional landscape evaluation methods(VRM,VSM),drawing lessons from the relevant theories of landscape ecology,and taking into account the hidden cultural connotation behind the landscape,this paper constructs a total of 17 indicators groups consisting of five elements: landscape visual sensitivity,landscape quality,landscape ecology,landscape pattern and landscape cultural value,which established a comprehensive evaluation system for the landscape of abandoned mining areas.Secondly,in order to avoid the objectivity and accuracy of the evaluation by single method affect as far as possible,the quantitative process of the evaluation index is completed by using GIS technology,and the analytic hierarchy process(AHP)and fuzzy comprehensive evaluation method are introduced to evaluate the landscape of abandoned mining areas comprehensively.Thirdly,utilized the interpretation data from Gaofen-2 satellite sensing images of Tonglushan mining area in Daye City in 2018 and combined with the feasibility of the empirical evaluation system and other graphic data and field survey data,the spatial attribute database of the evaluation index of the study area is established based on GIS technology,and the fuzzy function of the comprehensive evaluation index of the landscape of abandoned mining area is defined by using the theory of fuzzy mathematics,and then using the map algebra to find the membership function of each level in the GIS and establishing the fuzzy relation matrix of each grid point and determining the rating level of each grid landscape according to the maximization principle,which provides a scientific basis for measuring the landscape quality of abandoned mining areas.Finally,according to the evaluation results,the regeneration design strategy for Tonglushan abandoned mining area is put forward hierarchically,all the first-level comprehensive evaluation area is the key area for development,and attention should be paid to the overall optimization of its landscape;the second-level comprehensive evaluation area is the secondary development area,and attention should be paid to the improvement of inadequate and strengthening the improvement of landscape quality;the third-level comprehensive evaluation area has a high degree of abandonment,and attention should be paid to excavating the available space;the four-level comprehensive evaluation area is the area with the lowest landscape value and quality,which should follow the economic principles and pay attention to ecological restoration.At the same time,a node is selected from each comprehensive evaluation grade area for detailed analysis and put forward a targeted regeneration design strategy,which provides a complete process model from landscape evaluation to how to design regeneration based on the evaluation results.