Study on the ecological environmental spatio-temporal evolution in the Gansu section of the Weihe River basin
In order to protect ecological environment and realize high quality development in Weihe River basin(WRB)whose ecological environment is fragile,it is of great significance to rapidly and accurately evaluate the current ecological environment,analyze the spatial-temporal evolution laws and driving factors of the ecological environment.Taking the Gansu section of the WRB as the study area,this study makes an assessment of the ecological environment in the study area on the basis of Google Earth Engine and RSEI model.Trend analysis and correlation analysis are used to investigate the law of ecological environmental quality evolution in the Gansu section of the WRB from 2000 to 2021 and its driving factors.The results reveal:Ecological environmental quality in the Gansu section of the WRB decreases gradually from southeast to northwest.Over 22 years,the temporal evolution of ecological environment quality had risen rapidly then increased unstably.The ecological environment quality has improving trend in most of the study area.The research area shows a positive correlation between the ecological environment quality of the county and the overall study area.The ecological environment changes in most counties are synchronous while the evolution and agglomeration of ecological environment quality between towns are obvious;Natural disasters and destructive extraction have significant negative effects while returning farmland to forest and grassland and a series of measures to protect the ecological environment have obvious positive effects on ecological environment improvement.The study results will be helpful to take targeted measures to protect the ecological environment and improve the ecological environment quality.
Weihe River basinremote sensing ecological indexspatio-temporal evolutioncorrelation analysis
NETL
NSTL
万方数据
