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Desertification Control

Desertification Control

Patterns of Blown-sand Hazard Control for Traffic Arteries in China and Their Application

LI Shengyu;LEI Jiaqiang;XU Xinwen;QU Jianjun;REN Hongjing

Bulletin of Chinese Academy of Sciences,2020,Vol 35,No. 06

【Abstract】 Highways and railways are important infrastructures of land transportation. The blown-sand hazard control of traffic arteries in sandy areas has always been one important issue in the national economy and society. In view of the characteristics of aeolian environment and the demand for safe operation of traffic arteries, China has carried out a large number of sand hazard control experiment and practices mainly on technology innovation of materials, measures, comprehensive system, maintenance, summed up four configuration patterns of sand control system, and created some patterns of sand hazard control technology for desert traffic arteries in different aeolian environments with Chinese characteristics. At the same time, the patterns have been applied successfully in the Baotou-Lanzhou Railway, the Qinghai-Tibet Railway, Tarim Desert Highway in Taklimakan Desert, and the Open Channel in Gurbantunggut Desert. China’s achievements in the sand hazard control for land transportation arteries have a broad application prospect in sandy areas in the world, especially in the countries along the Belt and Road.

China’s Combating Desertification: National Solutions and Global Paradigm

LU Qi;LEI Jiaqiang;LI Xiaosong;YANG Youlin;WANG Feng

Bulletin of Chinese Academy of Sciences,2020,Vol 35,No. 06

【Abstract】 Desertification, since initial recognition in 1927 and common definition in 1992, through its vicissitudes, is still one of the serious global environmental issues facing the world and exists as the bottleneck of development. Desertification threatens terrestrial ecological security and limits the sustainability of socio-economic development. In consideration of the impacts of desertification, an “Earth Cancer” and a persistent disease, the authors contribute four prescriptions of “good medicines” for the global initiatives to combat desertification, on the basic framework of Chinese strategies and experiences of “four horizontal beams and eight pillars,” in line with the 15.3 goal of Sustainable Development Goals (SDGs); namely, development of Protocol of United Nations Convention to Combat Desertification (UNCCD) and unification of Weights and Measures (benchmarks and indicators) of the implementation and compliance of the UNCCD; setting up of global observation network to monitor the area change of dryland change; compilation of global natural desert (heritage) directory to leave behind landscape of aboriginal sand sea for future generations; initiation of “global governance action to combat desertification” to strive for achieving the target of Land Degradation Neutrality (LDN) at 2030.

Progress on Sandy Desertification Research and Future Combating Idea in Tibet, China

YANG Ping;WEI Xinghu;DONG Yuxiang;LI Sen

Bulletin of Chinese Academy of Sciences,2020,Vol 35,No. 06

【Abstract】 The problem of sandy desertification in Tibet is one of the important aspects of desertification research in China. The important progresses in the research on sandy desertification in Tibet in recent thirty years are concluded in the paper, such as finding out the status and characteristics of spatial and temporal change in recent years of sandy desertification in Tibet as well as its driving factors, establishing the theoretical system of sandy desertification in Tibet including the classification system of sandy desertification land and geological-historical evolutionary process of sandy desertification as well as the features of river valley aeolian landform in Tibet, building the combating strategy and control technical system of sandy desertification in Tibet with special plateau features. On the basic analysis of status and development trends as well as the control results of sandy desertification in Tibet, the future combating idea of sandy desertification in Tibet is forward given.

Dynamic change of land desertification and its driving mechanism in Yushenfu mining area based on remote sensing

MA Xiong-de;FAN Li-min;ZHANG Xiao-tuan;ZHANG Yun-feng;ZHANG Hong-qiang;BIAN Hui-ying

Journal of China Coal Society,2016,Vol 41,No. 08

【Abstract】 Human activities and natural factors are two kinds of driving force in land desertification. The present study attempts to identify their relative roles in the land desertification of Yushenfu coal mining area. The study utilized the three stages TM remote sensing image data of 1989, 2002 and 2011 on 1:50 000 scale for land desertification mapping and its dynamic change analysis. Combined with principal component analysis (PCA), the relative roles of human activities and natural factors in land desertification were identified in the study area. The results were: ① Based on the remote sensing image data, the expressions of normalized difference vegetation index (NDVI) and Albedo could be derived to rank desertification in the study area. ② The spatial distribution of land desertification presented a clear zonation pattern in mining area, the desertification in the western mining area was heavier than that of the eastern part. ③ Land desertification area decreased 36.7% and 27.7% during the periods 1989–2002 and 2002–2011 respectively, which made the desertification show a reversal trend. ④ The spatial distribution of land desertification was very different from west to east. The very severe and severe desertification areas decreased over the time in the western mining area obviously, while there was a trend of rehabilitation firstly and then improvement in the east. ⑤ Coal mining activities and climate change accounted for 62.16% and 14.18% of the total variance, suggesting the main driving force of land desertification was human activities. The results show that water protected coal mine, grazing prohibition and tree planting are the only ways to rehabilitate the land degradation in Yushenfu coal mining area.

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