Analysis of Vegetation Eco-Environment Quality Change Features in Guizhou Province from 1990 to 2015
Macroscopic vegetation eco-environment quality dynamic change features of Guizhou Province from 1990-2015were studied by using long time and high spatial resolution RS images,in order to provide a decision basis for regional vegetation restoration and ecological environment construction.Landsat TM,ETM,OLI and ASTER GDEM data sets were used for extracting vegetation coverage,soil index,humidity index and slope indexes.Comprehensive index evaluation model was employed to obtain vegetation eco-environment quality thematic map for three periods.The vegetation eco-environment quality was divided into ten ranks for distinguishing quality.Results show that the provincial vegetation eco-environment quality is given priority of "excellent" and "good".The "medium" reduced by 20.18％,while "excellent" increased by 16.37％ which means that vegetation eco-environment quality is getting better.Vegetation eco-environment quality in the southeast is better than the northwest of Guizhou Province.The maximum value of "excellent" and "good" aggregation in state minus the lowest value are 37.1％,21.13％ and 12.21％ in 1990,2000 and 2015,respectively,indicating that the spatial difference of vegetation eco-environment quality is shrinking in Guizhou Province.By 2015,vegetation eco-environment quality of Liupanshui City,Bijie City,Zunyi City and Qianxinan City had been improved obviously,while Anshun City,Liupanshui City,Guiyang city and Qianxinan City had been still poor.The vegetation eco-environment quality in southwest and middle region of Guizhou Province should be strengthened in the future,especially Anshun City,Liupanshui City,Guiyang City and Qianxinan City.
vegetation eco-environment qualityvegetation coveragesoil indexslopeGuizhou Province
NETL
NSTL
万方数据
维普
