Evolution of sandy desertification in North China from 2010 to 2018
LIU Jianyu1,2, NIE Hongfeng1,2, XIAO Chunlei1,2, SHANG Boxuan1,2, LI Wei1,2, JI Xinyang1
1. China Aero Geophysical Survey & Remote Sensing Center for Natural Resources, Beijing 100083, China; 2. Territorial Ecological Protection and Restoration Center of China Geological Survey, Beijing 100083, China
Abstract：Desertification has became a major threat to the global ecological environment. The wind erosion is very intense in North China, with prominent sandy desertification problems. In this research, the authors selected six northern provinces with widely sandy land distribution as the study area to comprehensively analyze the meteorological and geological factors and discuss the cause of change in Maowusu sandy land and Horqin sandy land, based on the evolution patterns of sandy desertification land by TM images of 2010 and OLI images of 2018. The results indicated that the sandy desertification land in North China in 2018 was 350 800 km2, mainly distributed in Inner Mongolia Autonomous Region and Xinjiang Uygur Autonomous Region, with severe, moderate and mild sandy desertification land of 119 200 km2 135 400 km2 and 96 200 km2, respectively. From 2010 to 2018, the area of sandy desertification land in North China decreased by 7 400 km2, and the Xinjiang Uygur Autonomous Region and Inner Mongolia Autonomous Region decreased mostly with the areas of 4 800 km2 and 1 900 km2, respectively, also with the area of desertification reduction of 35 400 km2. Taking the Maowusu and Horqin sandy land as typical study area, the authors compared the differences of the ecogeological conditions between these two areas, and summarized the cause of improvement and aggravation of sandy desertification. Moreover, the authors suggested that the impact of human activities should be reduced for natural recovery in Maowusu sandy land, and in Horqin sandy the groundwater resources management land should be strengthened and vegetation structure should be optimized to promote returning farmland to forest or grassland. This research would provide scientific reference for the ecological protection of sandy desertification in North China.
刘建宇, 聂洪峰, 肖春蕾, 尚博譞, 李伟, 冀欣阳. 2010—2018年中国北方沙质荒漠化变化分析[J]. 中国地质调查, 2021, 8(6): 25-34.
LIU Jianyu, NIE Hongfeng, XIAO Chunlei, SHANG Boxuan, LI Wei, JI Xinyang. Evolution of sandy desertification in North China from 2010 to 2018. , 2021, 8(6): 25-34.
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