Evaluation of eco-environment quality in karst area using improved remote sensing ecological index
This paper selects four indices,including greenness(NDMVI),wetness(Wet),rocky desertification(RDI),and heat(LST),to construct an improved remote sensing ecological index(IRSEI)to evaluate the ecological environment quality of county karst areas.Based on county-scale remote sensing images and other geographical information data from 2003 and 2023,IRSEI and RSEI are quantitatively compared in several aspects.The results show that IRSEI contains richer information on mountain vegetation and rocky desertification conditions and can better characterize and evaluate the ecological environment quality of karst areas.And IRSEI is suitable as a quantitative indicator for the ecological environment quality evaluation of karst areas.In the study area of Luoping County,both improvement and degradation of ecological environment quality occurred between 2003 and 2023,but the overall ecological environment quality dropped by 7.46%,and the ecological grade changed from good to medium.From the perspective of spatial distribution,the areas with poor ecological quality in karst areas of Luoping County are mainly distributed in the north,and the areas with excellent ecological environment quality are mainly distributed in the central part.
万方数据
维普
