Study on land degradation monitoring in Shanxi by using remote sensing images

Abstract

Land degradation is a serious environmental problem. This paper briefly introduces the concept of remote sensing image technology and land degradation, and describes the basic process of using remote sensing image to monitor land degradation. Then, Shanxi Province was taken as an example to analyze the land cover type change and net primary productivity (NPP) change during 2016-2021. The annual average precipitation showed an increasing trend, and there was a significant positive correlation between the area of land types such as forest lands, grasslands, and water areas and the annual average precipitation. Moreover, the proportion of forest land, grassland, and construction land increased while the proportion of cultivated land gradually decreased; however, the proportion of water area remained basically unchanged. The local NPP showed an overall upward trend; NPP increased significantly or extremely significantly in most regions, while NPP decreased significantly or extremely significantly in a small part of regions.