Evolution of Landscape Ecological Risk in the Bailongjiang Basin of Gansu Province Based on Sample Analysis
In order to solve the problems of sustainable use of land resources and ecological environmental protection in the Bailong River Basin,the landscape ecological risk evaluation model was improved through the selection of landscape indices and landscape eco-logical risk research samples,and the landscape ecological risk evolution pattern in the Bailong River Basin from 2000 to 2020 was studied to analyse the potential characteristics of landscape ecological risk changes.The results showed that the area of arable land de-creased the most and the area of grassland increased the most during the study period.The landscape ecological risk of the Bailong River Basin was an important node at 3 000 m altitude,and the medium-risk and higher-risk zones increase significantly in the space less than 3 000 m,and above 3 000 m was the space where the low-risk and lower-risk zones were preserved.On the time scale,the area of low-risk and lower-risk zones decreased with time,and the area of higher-risk zones increased with time.Through the analysis of the study sample,it can be seen that the expansion of arable land is the main reason for the increase of the ecological risk of the landscape;the transformation of arable land to grassland is the main reason for the decrease of the ecological risk of the landscape.It can be seen that in the Bailong River Basin,arable land and grassland have become the wind vane of landscape ecological risk change,and the analysis of the influencing factors of risk evolution provides a new way for the identification and management of basin risk.
Bailong River Basinrisk evolutionspatiotemporal changeland usespatial autocorrelation
万方数据
维普
