Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Simple assessment of wind erosion depending on the soil texture and threshold wind velocity in reclaimed tidal flat land

  • Kyo-Suk, Lee (Department of Bio-environmental Chemistry, Collage of Agriculture and Life Science, Chungnam National University) ;
  • IL-Hwan, Seo (Department of Bio-environmental Chemistry, Collage of Agriculture and Life Science, Chungnam National University) ;
  • Jae-Eui, Yang (Department of Biological environment, College of Agriculture and Life Science, Kangwon National University) ;
  • Sang-Phil, Lee (Agriculture and Life Science Research Institute, Kangwon National University) ;
  • Hyun-Gyu, Jung (Department of Bio-environmental Chemistry, Collage of Agriculture and Life Science, Chungnam National University) ;
  • Doug Young, Chung (Department of Bio-environmental Chemistry, Collage of Agriculture and Life Science, Chungnam National University)
  • Received : 2021.10.13
  • Accepted : 2021.11.01
  • Published : 2021.12.01
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Abstract

The objectives of this paper were to simply estimate soil loss levels as caused by wind in reclaimed tidal flat land (RTFL) and the threshold wind velocity in the RTFL. For this experiment, RTFL located at Haenam Bay was selected and a total of 150 soil samples were collected at the Ap horizon from the five soil series. The particle distribution curves, including the limit of the non-erodible particle size (D > 0.84 mm) for each Ap horizon soil, show that the proportions of non-erodible particle sizes that exceeded 0.84 mm were 4.3% (Taehan, TH), 8.9% (Geangpo, GP), 0.5% (Bokchun, BC), 1.6% (Poseung, PS) and 1.4% (Junbook, JB), indicating that the amount of non-erodible soil particles increased with an increase in the sand content. The average monthly, daily and instantaneous wind velocities were higher than the threshold friction velocity (TFV) calculated according to the dynamic velocity (Vd) by Bagnold, while the average monthly wind velocity was lower than those of the TFV suggested by the revised wind erosion equation (RWEQ) and wind erosion prediction system (WEPS). The susceptible proportions of erodible soil particles from the Ap horizon soil samples from each soil series could be significantly influenced by the proportion of sand particles between 0.025 and 0.5 mm (or 0.84 mm) in diameter regardless of the threshold wind velocity. Thus, further investigations are needed to estimate more precisely soil erosion in RTFL, which shows various soil characteristics, as these estimations of soil loss in the five soil series were obtained only when considering wind velocities and soil textures.

Keywords

Acknowledgement

This subject is supported by Korea Ministry of Environment as "The SS (Surface Soil conservation and management) projects; 2019002820004".

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