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Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (5): 111-119.DOI: 10.7522/j.issn.1000-694X.2021.00055

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Change of soil wind erosion and attribution in Bayannur, Inner Mongolia based on the Revised Wind Erosion Equation

Lizhu Xing1,2(), Fangmin Zhang1(), Kaicheng Xing3, Yunpeng Li4, Qi Lu5, Feifei Lu6   

  1. 1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters / Jiangsu Key Laboratory of Agricultural Meteorology,College of Applied Meteorology,Nanjing University of Information Science & Technology,Nanjing 210044,China
    2.Zaozhuang Meteorological Bureau,Zaozhuang 277800,Shandong,China
    3.Hebei Provincial Climate Center,Shijiazhuang 050021,China
    4.Ecology and Agrometeorology Center of Inner Mongolia Autonomous Region,Hohhot 010051,China
    5.Institute of Desertification Studies / Experimental Center of Desert Forestry,Chinese Academy of Forestry,Beijing 100091,China
    6.Forestry Investigation and Planning Institute of Bayannur,Bayannur 015000,Inner Mongolia,China
  • Received:2020-11-25 Revised:2021-04-27 Online:2021-09-20 Published:2021-09-23
  • Contact: Fangmin Zhang

Abstract:

Soil wind erosion is a major ecological environmental problem in arid and semi-arid regions. The change of soil wind erosion and the causes were analyzed based on the revised wind erosion equation (RWEQ) and GIS technology in Bayannur of Inner Mongolia from 1980 to 2018. The results showed that : (1) during the study period, the annual soil wind erosion modulus generally showed a downward trend in Bayannur, Inner Mongolia, with the annual mean is 40.26 t·hm-2, and the tendency rate was -8.02 t·hm-2 every10 years. moderate wind erosion was dominant before 2000, and then mired wind erosion occurred in Bayannur. (2) In space, the high value area of soil wind erosion is mainly distributed in the northwest, and the low value area is mainly distributed in the south in Bayannur. The area proportion of each wind erosion intensity was moderate > mild > strong > mired > very strong > fierce, and mired and mild wind erosion area showed an increasing trend, while moderate, strong, very strong and fierce wind erosion area showed a decreasing trend. In general, soil wind erosion showed a downward trend, with the greatest decline in the northwest and the smallest in the south. (3) Soil wind erosion is mainly affected by vegetation coverage (VC), wind speed (u), temperature (Ta) and soil water content (sw) in Bayannur of Inner Mongolia. The direct effect of VC is the most obvious, while uTa and sw mainly have indirect effects. On the whole, VC has the strongest comprehensive determination ability on soil wind erosion change, while Ta has the weakest ability in Bayannur of Inner Mongolia.

Key words: RWEQ, soil wind erosion, temporal and spatial variation, influencing factors, path analysis

CLC Number: