Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Applicability of PAM(Polyacrylamide) in Soil Erosion Prevention: Rainfall Simulation Experiments

경사지 토양유실 방지를 위한 PAM(Polyacrylamide) 시제품의 효율성 비교평가: 실내 인공강우 실험

  • Choi, Bong-Su (Department of Biological Environment, Kangwon National University) ;
  • Lim, Jung-Eun (Department of Biological Environment, Kangwon National University) ;
  • Choi, Yong-Beum (Department of Biological Environment, Kangwon National University) ;
  • Lim, Kyoung-Jae (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Choi, Joong-Dae (Department of Regional Infrastructure Engineering, Kangwon National University) ;
  • Joo, Jin-Ho (Department of Biological Environment, Kangwon National University) ;
  • Yang, Jae-E. (Department of Biological Environment, Kangwon National University) ;
  • Ok, Yong-Sik (Department of Biological Environment, Kangwon National University)
  • 최봉수 (강원대학교 자원생물환경학과) ;
  • 임정은 (강원대학교 자원생물환경학과) ;
  • 최용범 (강원대학교 자원생물환경학과) ;
  • 임경재 (강원대학교 지역건설공학) ;
  • 최중대 (강원대학교 지역건설공학) ;
  • 주진호 (강원대학교 자원생물환경학과) ;
  • 양재의 (강원대학교 자원생물환경학과) ;
  • 옥용식 (강원대학교 자원생물환경학과)
  • Published : 2009.09.30
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Abstract

Surface runoff and erosion are responsible for extensive losses of top soil and agricultural productivity. In this study, a laboratory experiment was conducted to investigate the effects of different polyacrylamides (PAM) on the protection of soil from erosion and turbidity in loamy sand soil. To accomplish this, 10 and 40 kg $ha^{-1}$ of PAM were applied to the soil surface. The effects of rainfall on 10 and 20% slopes were then evaluated in the laboratory using a rainfall simulator. After air drying, the surface was subjected to rain at 30 mm $hr^{-1}$. The silt+clay of the runoff from samples treated with 10 kg PAM $ha^{-1}$ reduced by 43% and 13% when the 10% and 20% slopes were evaluated, respectively, when compared with the tap water without PAM treatment as control. The mean contents of silt+clay were reduced as the amount of PAMs applied increased at both slopes. Specifically, samples treated with 40 kg PAM $ha^{-1}$ showed reductions in the silt+clay of the runoff to 88% and 85% when the 10% and 20% slopes were evaluated, respectively, when compared to control. Furthermore, the mean turbidity of runoff in the 40 kg PAM $ha^{-1}$ treatment was reduced to 94.7% and 84.8% when the samples were subjected to 10% and 20% slopes, respectively, when compared to the control. Taken together, these findings indicate that PAM treatment will improve water pollution and agricultural productivity on sloped land via a reduction in soil erosion.

본 연구는 경사지의 토양유실 방지를 위한 관리방안의 하나로 실내 인공강우 장치를 이용하여 PAM에 의한 토양유실 저감 정도와 PAM의 적용가능성을 평가하였다. 인공 시험포의 경사도를 10%와 20%로 설정하고 국내외에서 시판되고 있는 7종류의 PAM을 10 kg $ha^{-1}$과 40 kg $ha^{-1}$ 수준으로 처리한 뒤 PAM을 처리하지 않은 대조구와 비교 평가하였다. PAM(10 kg $ha^{-1}$) 처리는 10%와 20% 경사도의 시험구에서 각각 평균 40%와 21%의 토양유실량 저감효과를 나타냈으며, PAM을 40 kg $ha^{-1}$ 처리한 경우 10%와 20% 경사도의 시험구에서 각각 평균 88%와 85%의 토양유실량 저감효율을 나타냈다. PAM(10 kg $ha^{-1}$) 처리시 10%와 20% 경사지에서 미사와 점토의 유실량은 각각 43% 및 13%로 저감되었고 PAM 처리량의 증가(40 kg $ha^{-1}$)는 경사도 변화에 따라 미사와 점토의 유실을 각각 89 및 86% 저감하였다. PAM 처리에 따른 토양유실량 저감효과는 결과적으로 탁수 발생도 상당히 감소하였는데 주 요인은 미사나 점토와 같은 미립광물과 관련된 것으로 조사되었다. 이상의 결과로부터 PAM 처리는 경사지에서의 토양유실 및 탁도 저감에 우수한 효과가 있는 것으로 판단된다.

Keywords

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