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급경사면의 면상침식에 대한 사질토양의 침식성 평가
Erodibility evaluation of sandy soils for sheet erosion on steep slopes 원문보기

Journal of Korea Water Resources Association = 한국수자원학회논문집, v.55 no.4, 2022년, pp.291 - 300  

신승숙 (강릉원주대학교 방재연구소) ,  박상덕 (강릉원주대학교 토목공학과) ,  황윤희 ((주)동서엔지니어링)

초록
AI-Helper 아이콘AI-Helper

산지의 인위적인 교란은 양토 비율이 적은 심토를 지표에 노출시켜 침식의 민감도를 증가시킨다. 본 연구는 강우유입 면상흐름에 의해 발생하는 세류간 침식에 있어서 사질토(sand)와 양질사토(loamy sand)의 침식성(erodibility)을 평가하고자 강우모의 실험을 수행하였다. 실험에 사용한 사질토와 양질사토의 평균입경은 각각 0.936 mm와 0.611 mm이고, 유기물함량은 각각 2.0%와 4.2%이었다. 실험 플롯에서 지표흐름의 유출계수는 양질사토가 사질토보다 1.16 배 증가하였다. 면상침식에 의한 양질사토와 사질토의 평균 토사유출량은 각각 3.71kg/m2/hr와 1.13kg/m2/hr 이었다. 강우침식능인자에 대한 토사유출량의 비인 침식성은 양질사토가 사질토보다 평균 3.65 배 컸다. 급경사면의 경사도가 24°에서 28°로 증가함에 따라 두 토양에 대한 유사농도와 침식성은 약 20%정도 증가하였다. 소규모 플롯에 대한 사질토양의 침식성인자 K 는 실측 침식성에 비해 과대 산정되었다. 이 결과는 RUSLE가 사질토양에서 면상침식에 의해 발생하는 토사유출량을 과대평가할 수 있음을 의미한다.

Abstract AI-Helper 아이콘AI-Helper

Artificial disturbance in mountainous areas increases the sensitivity to erosion by exposure of the subsoil with a low loam ratio to the surface. In this study, rainfall simulations were conducted to evaluate the erodibility of sand and loamy sand in the interrill erosion by the rainfall-induced she...

주제어

표/그림 (10)

참고문헌 (40)

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