Journal of the Korean Society of Environmental Restoration Technology (한국환경복원기술학회지)

The Korea Society of Environmental Restoration Technology (한국환경복원기술학회)
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Predicting Surface Runoff and Soil Erosion from an Unpaved Forest Road Using Rainfall Simulation

인공강우실험에 의한 임도노면의 지표유출량 및 토양유실량 평가

  • Eu, Song (Department of Forest Science, Seoul National University) ;
  • Li, Qiwen (Department of Forest Science, Seoul National University) ;
  • Lee, Eun Jai (Department of Forest Science, Seoul National University) ;
  • Im, Sangjun (Department of Forest Science, Seoul National University)
  • 유송 (서울대학교 산림과학부) ;
  • ;
  • 이은재 (서울대학교 산림과학부) ;
  • 임상준 (서울대학교 산림과학부)
  • Received : 2015.03.02
  • Accepted : 2015.05.03
  • Published : 2015.06.30
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Abstract

Unpaved forest roads are common accessways in mountain areas being used for forestry purposes. The presence of forest roads produces large volumes of surface runoff and sediment yield due to changes in soil properties and hillslope profile. Rainfall simulation experiments were conducted to estimate the impacts of above-ground vegetation and antecedent soil water condition on hydrology and sediment processes. A total of 9 small plots($1m{\times}0.5m$) were installed to represent different road surface conditions: no-vegetation(3 plots), vegetated surface(3 plots), and cleared vegetation surface(3 plots). Experiments were carried out on dry, wet, and very wet soil moisture conditions for each plot. Above ground parts of vegetation on road surface influenced significantly on surface runoff. Runoff from no-vegetation roads(39.24L) was greater than that from vegetated(25.05L), while cleared-vegetation condition is similar to no-vegetation roads(39.72L). Runoff rate responded in a similar way to runoff volume. Soil erosion was also controlled by land cover, but the magnitude is little than that of surface runoff. Even though slight differences among antecedent soil moisture conditions were found on both runoff and soil erosion, runoff rate and soil losses were increased in very wet condition, followed by wet condition. The experiments suggest that vegetation cover on forest road surface seems most effective way to reduce surface runoff and soil erosion during storm periods.

Keywords

References

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