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[1]HU Mengtian,ZHANG Hui,GAO Jixi,et al.RWEQ-Based Assessment on Sensitivity of Land Desertification[J].Research of Soil and Water Conservation,2021,28(01):368-372.

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RWEQ-Based Assessment on Sensitivity of Land Desertification

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 01 Page number: 368-372 Column: Public date: 2021-01-10

Title:: RWEQ-Based Assessment on Sensitivity of Land Desertification

Author(s):: HU Mengtian¹, ZHANG Hui^1,2, GAO Jixi³, QIU Kuanbiao¹, WANG Yansong⁴, LYU Jiujun⁴, JU Changhua ¹; (1.Nanjing Institute of Environmental Sciences, ministry of Ecology and Environment, Nanjing 210042, China; 2.Jiangsu Collaborative Innovation Center of Atmospheric Environment Technology, Nanjing University of Information Science & Technology, Nanjing 210044, China; 3.Satellite Environment Center, ministry of Ecology and Environment, Beijing 100094, China; 4.Liaoning Science and Technology Center for Ecological and Environmental Protection, Shenyang 110161, China)

Keywords:: assessment of sensitivity of land to desertification; factor optimization; northwest China; RWEQ model

CLC:: X826

DOI:: -

Abstract:: Northwestern China is the largest area of land affected by land desertification with fastest expanding, which causes a great loss to this region. It is of great significance to improve the classification accuracy of land sensitivity to desertification for the accurate identification of areas sensitivity to desertification, for the scientific delimitation of the land sensitivity to desertification ecological red lines and for formulating the control countermeasures of land desertification. In this paper, the wind erosion factor and soil moisture factor in revised wind erosion equation model were used to replace days on strong wind factor and climate dryness factor in the assessment of land sensitivity to desertification(general assessment of land sensitivity to desertification). And we assessed northwest China's land sensitivity to desertification by the revised wind erosion equation model based assessment of land sensitivity to desertification(modified assessment of land sensitivity to desertification)and general assessment of land sensitivity to desertification. The results show that:(1)the spatial distribution of soil moisture factor in modified assessment of land sensitivity to desertification is strongly coincided with that of the climate dryness factor in general assessment of land sensitivity to desertification, at the same time, the spatial distribution of wind erosion factor in modified assessment of land sensitivity to desertification is strongly coincided with that of the days on strong wind factor in general assessment of land sensitivity to desertification; but in the area where meteorological stations scarcely and unevenly distribute, the soil moisture factor and wind erosion factor can more accurately describe the degree of land dryness and wind intensity;(2)compared with general assessment of land sensitivity to desertification method, the results of the modified assessment of land sensitivity to desertification method in northwest China could obtain higher spatial accuracy and more reasonable spatial distribution; the modified assessment of land sensitivity to desertification method can provide support for spatial refinement assessment on land sensitivity to desertification in the future.

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Last Update: 2021-01-15