E3S Web Conf.
Volume 341, 20222022 7th International Conference on Green Materials and Environmental Engineering (GMEE2022)
|Number of page(s)||5|
|Published online||31 January 2022|
Remote sensing comprehensive evaluation of land degradation based on relative rain use efficiency of vegetation
China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, 100083 Beijing, China
* Corresponding author: firstname.lastname@example.org
China is one of the countries with serious land degradation problems in the world. Land degradation directly threatens the food security of our country and determines the sustainable development of social economy. In this paper, the potential evapotranspiration and moisture index are calculated to divide the climatic zone of China. Based on the NPP and precipitation data, the national rRUE is obtained by the edge function. With the climate "relative benchmark", the rules of threshold analysis is used to comprehensively evaluate the land degradation in China. The results show that: excellent land is concentrated in northeast China, western Xinjiang and eastern Qinghai-Tibet Plateau; mildly degraded land is widely and sporadically distributed in the eastern plain of China; moderately degraded land and severely degraded land are concentrated in western Inner Mongolia, southern Xinjiang and northern Qinghai-Xizang Plateau.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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