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Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (4): 120-127.DOI: 10.7522/j.issn.1000-694X.2019.00089

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The simulation study of wind erosion characteristics of different soils in Inner Mongolia reach of Yellow River

Baoyang Sun1,2,3(), Rui Zhou4, Zhe Wang5, Junbo Xiao6, Jianye Ma3, Chaodong Li3, Bo Ma3()   

  1. 1.Changjiang River Scientific Research Institute, Changjiang Water Resources Commission, Wuhan 430010 China
    2.Engineering Technology Research Center of Mountain Flood Geological Disaster Prevention and Control, Ministry of Water Resources, Wuhan 430010, China
    3.Northwest A&F University, Yangling 712100, Shaanxi, China
    4.China Three Gorges International Corporation, Beijing 100038, China
    5.Huantai county water bureau, Zibo, 256400, Shandong, China
    6.Institute of Water Resources Research, Guangxi Zhuang Autonomous Region, Guangxi 530023, China
  • Received:2019-08-04 Revised:2019-10-10 Online:2020-08-20 Published:2020-09-01
  • Contact: Bo Ma

Abstract:

In order to study the wind erosion characteristics of different textures soil, the aeolian sandy soil and gray desert soil, brown calcium soil and irrigation soil were investigated and collect in the fields. Soil physical properties and wind tunnel simulation were tested in the laboratory. The wind erosion intensity and drifting sand flux of four kinds of soil under the condition of different wind speed and soil moisture content were analyzed. The relationship between wind erosion intensity and soil physical and chemical properties was also quantified. The results showed that: (1) Compared with the brown calcium soil and the irrigated soil, the content of erodibility particles in the aeolian sandy soil and the grey desert soil was larger, and the content of aggregates, organic matter and calcium carbonate was smaller. However, the relationship of average wind erosion intensity under the same wind speed and water content was: the aeolian sandy soil> brown calcium soil > grey desert soil > irrigated soil. (2) Different soil wind erosion intensity and wind speed showed a good power function relationship (R2≥0.85, P< 0.05), especially for aeolian sandy soil and brown calcium soil, the power function relationship was significantly better than the exponential function. (3) In addition to grey desert soil, the average wind erosion intensity of soil showed a good exponential function relationship with the increase of soil water content ((R2 > 0.90, P< 0.05). The critical point of water content of wind erosion intensity of aeolian sandy soil and grey desert soil was about 4.5%, while compared with sandy loam, irrigated soil and brown calcium soil had no obvious critical point. (4) Sediment transport rates of different soils all decrease sharply with the increase of height from the surface. Within a distance of 10 cm from the surface, the size of different soil sediment transport rates in the total sediment transport rate was: aeolian sandy soil (82.67%)> grey desert soil (80.77%) > irrigated soil (74.07%)> brown calcium soil (73.77%). When the distance from the surface was greater than 30 cm, wind-eroded particles are basically not collected in the wind-blown sand soil and grey desert soil sand collector. When the axial wind speed is 16 m/s, the structures of different soil sand-wind flows all show a single peak curve. (5) Different soil wind erosion intensity has a strong non-linear correlation with wind speed, water content, aggregates, erodibility particles and clay content (R2=0.76, P<0.05). The content of erodible particles is the most important soil property, followed by dry aggregates and clay particles.

Key words: wind erosion intensity, soil moisture content, wind velocity, drifting sand flux

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