Landscape Ecological Risk Assessment of Dianchi Lake Basin Based on Land Use Change

Abstract

In order to explore the impact of land use type change on landscape ecological risk, this paper uses Landsat remote sensing image of Dianchi Lake Basin in 2003-2018 as the basis data to interpret its land use type by ENVI, and combines ArcGIS and Fragstats4.2 according to landscape ecology theory. The various landscape ecological indices were calculated, and the spatial pattern and process characteristics of landscape ecological risk in Dianchi Lake Basin from 2003 to 2018 were analyzed. The results show that: (1) The landscape pattern of Dianchi Lake Basin has changed significantly in 2003-2018. (2) The landscape ecological risk level has a gradually increasing trend, that is, the proportion of the medium risk area to the high-risk area is relatively large. (3) From the perspective of spatial distribution, the overall risk distribution of Dianchi Lake Basin has an increasing trend from Dianchi Lake to Dianchi Lake.