Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Sensitivity of Runoff and Soil Erosion in the Burnt Mountains

산불지역의 유출 및 토양침식 민감도

  • Published : 2005.01.01
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Abstract

Mountain watersheds are a lot of problems about soil erosion because of frequent wildfire occurrence. Runoff and soil erosion caused by the rain on a hillslope after wildfire are dependent on cover factor. And these has been a decrease by the cover factor recovery following time passage. The present paper defines the dynamic sensitivity of runoff and soil erosion that is the rate of runoff volume and soil erosion weight to rainfall energy and analyzes characteristics of the sensitivity for variation of cover factor, In according to the correlation analysis between other parameters and sensitivities, the sensitivity is the most dependent on the cover factor and the relation is exponential. The sensitivities after wildfire have suitable relation with treatment method for the mitigation of burnt forest and wildfire intensity. It was confirmed that the variation of soil erosion sensitivities come upon the range of stability in 5 years after wildfire.

빈번하게 발생하고 있는 산불은 산지유역에 과도한 토사유출 문제를 일으키고 있다. 산불 이후 산지사면에서 강우에 의한 토사유출은 지표식생인자에 의해 지배되며 지표식생은 시간의 경과에 따라 점차 회복되고 이는 토사유출을 저감시킨다. 본 연구에서는 민감도를 강우에너지에 대한 유출 및 토양침식량의 비로 정의하고, 지표인자 변화에 따른 유출 및 토양침식 민감도의 특성을 분석하였다. 그 민감도에 대한 매개변수들의 상관관계를 분석한 결과 지표식생지수와의 상관성이 가장 높았으며 지수함수적인 관계를 나타내었다. 산불이후 경과시간에 따른 민감도는 산불피해복구 대책공법과 산불의 강도 모두 적합한 감소 기울기를 보였다. 산불발생 년도에 따른 토양침식민감도의 변화에서는 산불발생 이후 약 5년이 경과하면 토양침식민감도 변화가 적어 안정적인 범위 이내로 접어드는 것이 확인되었다.

Keywords

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  1. Statistical Soil Erosion Model for Burnt Mountain Areas in Korea—RUSLE Approach vol.17, pp.2, 2012, https://doi.org/10.1061/(ASCE)HE.1943-5584.0000441
  2. Sediment and hydrological response to vegetation recovery following wildfire on hillslopes and the hollow of a small watershed vol.499, 2013, https://doi.org/10.1016/j.jhydrol.2013.06.048
  3. SEMMA Revision to Evaluate Soil Erosion on Mountainous Watershed of Large Scale vol.46, pp.9, 2013, https://doi.org/10.3741/JKWRA.2013.46.9.885