Ecological Environmental Quality Assessment Of Etuoke Banner Based On Remote Sensing

In this paper,the remote sensing images in 2005,2010,2015 and 2018 are used as the data source,and the new remote sensing ecological index is used through principal component analysis,dynamic degree model,gray model prediction method and other methods The eco-environmental quality of Etuoke Banner in Ordos City was evaluated by the method of rsei index,and the temporal and spatial variation characteristics of eco-environmental quality and the influence of human factors and natural factors on eco-environmental quality were analyzed.The conclusions are as follows:(1)The greenness index and humidity index of Ertok Banner showed an increasing trend,and the dryness index and heat index showed a gradually decreasing trend during 2005-2018.(2)The ecological environment quality of Ertok Banner showed a trend of increasing after a small decrease in the last 13 a,with better ecological quality environment in the central and southeastern part of the study area,and worse ecological environment quality in the southwestern part and the western mountainous area.In the center of gravity migration model,when RSEI takes the value of [0,0.2],the degree of change is the largest,and the cumulative migration distance is 120.75 km,which is in the west-south direction,and when RSEI takes the value of [0.6-0.8],the degree of change is the smallest,and the migration distance is 25.96 km,which is in the west direction.Through the analysis of each soum town,the ecological environment of Arbas soum and Mukainur town is better,and that of Qipanjing town and Mengxi town is worse.Through the gray-scale prediction model,the predicted values of RSEI index of ecological environment quality in 2020-2035 in Ertok Banner are: 0.5780,0.6038,0.6307 and 0.6587,indicating that the ecological environment quality in Ertok Banner is gradually getting better in the prediction period.(3)Among natural factors,precipitation,average wind speed and average temperature have great influence on ecological environment,elevation and slope are the main topographic factors affecting ecological environment quality;among human factors,gross product and rural population are the main factors affecting ecological environment quality;under different land use types,ecological environment quality of arable land,forest land and garden land is better.