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고분자유기응집제 (Polyacrylamide)를 활용한 농경지 사면 토양유실 저감 효과 분석

Polyacrylamide, Its Beneficial Application of Soil Erosion Control from Sloped Agricultural Fields

  • Kim, Minyoung (Agricultural Safety Engineering, Department of Agricultural Engineering, National Academy of Agricultural Science, Rural Development Administration) ;
  • Choi, Yonghun (Agricultural Safety Engineering, Department of Agricultural Engineering, National Academy of Agricultural Science, Rural Development Administration) ;
  • Lee, Sangbong (Planning & Coordination Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Hyunjeong (Agricultural Safety Engineering, Department of Agricultural Engineering, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Seounghee (Agricultural Safety Engineering, Department of Agricultural Engineering, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Youngjin (Agricultural Safety Engineering, Department of Agricultural Engineering, National Academy of Agricultural Science, Rural Development Administration)
  • 투고 : 2015.06.24
  • 심사 : 2015.09.21
  • 발행 : 2015.09.30

초록

This study conducted a series of field experiments using soil conditioners, Polyacrylamide(PAM) and gypsum, to evaluate their effects in reducing sediment loss and surface runoff. In addition, the correction factors (K-alpha) for the erodibility factor (K) were determined to reflect the effects of PAM and PAM+gypsum in applying the USLE equation. Experimental erosion plots individually sized $10m^2$ (5 m long, 2 m wide and 1 m deep) have different slopes (10, 20 and 30%). Erosion plots were prepared for one control (C; no PAM and gypsum) and two treatments (P; PAM 20 kg/ha, PG; PAM 20 kg/ha+gypsum 3,000 kg/ha). The amounts of soil eroded and runoff were continuously monitored from July $1^{st}$ to Oct. $31^{st}$ in 2010 and compared to each other. The amount of sediment loss from a control plot was 399.2 ton/ha and the relative reduction of sediment loss were 11.4% and 33.4% for PAM-treated and PAM+gypsum treated plots, respectively. This study also determined the K-alpha factors in the USLE equation to account for the erosion control effectiveness of PAM and gypsum application. The K-alpha factors were calculated as 0.92 for PAM-treated plot and 0.69 for PAM+gypsum-treated plot. The findings of this study revealed that soil conditioners (PAM and gypsum) could play a significant role in controlling soil erosion. In addition, the modified USLE equation using the K-alpha could provide valuable information to make better decision on establishment of best management practice for soil erosion control in agriculture.

키워드

참고문헌

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피인용 문헌

  1. Changes in Soil Water Content and Drainage Characteristics with Superabsorbent Polymers Amendment vol.58, pp.3, 2016, https://doi.org/10.5389/KSAE.2016.58.3.047