Study On Dynamic Change Of Land Use Landscape Pattern In Filling Reclamation Area

Coal gangue filling reclamation projectnot onlymade full use of coal ganguethereby reduce the occupied land by coal gangue,but rapidly restored the degraded ecosystem which caused by coal mining disturbance and accelerated the exploitation valueof reclamation land.Therefore,comprehensive study on the dynamic change of filling reclamation area land use landscape pattern wasbeneficial to determin land use pattern and the ecological protection direction which were coordinated with the reclamation area natural conditions,and achieve the coal mining areashift to resource-saving and environment-friendlyproductive mode.Shanxi Yangquan coal mining group coal gangue filling reclamation area was taken as the study Area,this dissertationhas studied effects on land systems,ecological processes,landscape structure and stability in multi-scale and multi-anglemainly based on 1987,1995,2006 and 2015 four remote sensing image data.The dissertation process and results were mainly expressed in the following four aspects:(1)In terms of temporal and spatial changes of land use,spatial and temporal changes characteristicsof land usenumberand structuralanalysis in coal gangue filling reclamation area showed that filling reclamation project was the main interference activity in the reclamation area during the study period.And to the regional environmental change,thedriver degree of reclamation project influence was highest.(2)On the landscape pattern changes,it has firstly optimized and selected landscape pattern metrics by rank correlation analysis and established multi-scale dynamic changes of landscape pattern evaluation system which was suitable forcoal gangue filling reclamation area.Next,it analyzed size effect of each landscape of land use type from patch-level,class-level and landscape-level three aspects.Finally,it evaluateddynamic changes of landscape connectivity and discrete based on the multi-scale dynamic changes of landscape pattern evaluation system.The resluts revealed filling reclamation effects and evolvement process of landscape pattern.(3)As far as the landscape stability,the study mainly includes landscape type stability and landscape pattern stability two aspects.First,it evaluated the landscape stability by optimized and selected the matrix,patch,patch density three stability metrics and calculated the comprehensive index of ecological impact in the change process of filling reclamationarea.The methods quantitatively analyzed the regional environment effects caused by the filling reclamation project.The conclusion was that the environment interference of filling reclamation was less,system structure and ecological functions were not destroyed,filling reclamation area landscape remained generally stable during the study period.(4)For the ecological security evaluation,the study first established resistance index system that includes landscape type,terrain index,patch importance three landscape elements based on the minimum cumulative resistance model and the "source sink" theory of landscape ecology.Continually,it established landscape security evaluation system which faced to coal gangue filling reclamation area and analyzed the temporal and spatial variation of landscape security level in the four research intervals.The landscape ecological security level in the south of the study area was relatively low.So the area was proposed to strengthenartificial vegetation restoration project after the filling reclamation.The study which was with the help of the theory of ecosystem disturbanceexploreddynamic change process of land use landscape pattern in reclamation area,establishedquantitative evaluation methodthat has the characteristics of multi-level and multi-perspective for dynamic change of degraded ecosystem.And its main objecwas faced to t was land use landscape structure,landscape pattern,landscape stability and ecological security evaluationcaused by the filling reclamation.It has important scientific and practical significance for reasonably determine the future direction of filling reclamation project and alleviation of environmental damage in mining area.