A study on land use change and its eco-environmental effect in Wanjiang Urban Belt in recent 20 years
The analysis of regional land use change and its influence on ecological environment can pro-vide theoretical basis for regional land use structure optimization and ecological environment protection.Taking Wanjiang Urban Belt as an example,based on the land use data sets of 2000,2010 and 2020,the land use transfer matrix model was used to analyze the spatial-temporal change characteristics of land use in this area.At the same time,the ecological and environmental effects of land use change were explored by combining ecological environment quality index,grid cell analysis method and ecological contribution rate of land use transformation.The results show that:(1)The transfer of land use in Wanjiang Urban Belt was mainly the mutual transfer between cultivated land and forest,with the transfer area of 1 491.86 km2 and 1 589.20 km2,respectively,and the occupation of man-made land surface,with a total of 2 650.33 km2 transferred.(2)The ecological value of forest in Wanjiang City Belt is the most important,with the highest value of 55.29％.The change of man-made land has a great impact on the ecological value of this area,and the contribution rate of ecological value is 28.20％.(3)The eco-environmental quality index of Wanjiang City Belt was stable at 0.429 9～0.436 0,showing a downward trend,and the regional eco-environmental quality index showed a spatial pattern of"higher in the south and lower in the north".(4)The conversion of cultivated land to forest and grassland is the main reason for the improvement of ecological environment.The conversion of forest to cultivated land and cultivated land to artificial surface are the main reasons for the deterioration of ecological environment.
land use changeecological environment effectregional eco-environmental quality indexWanjiang City Belt
国家科技期刊平台
NSTL
万方数据
维普
