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NTIS 바로가기Journal of Korea Water Resources Association = 한국수자원학회논문집, v.48 no.7, 2015년, pp.595 - 604
남명준 (강릉원주대학교 방재연구소) , 박상덕 (강릉원주대학교 토목공학과) , 이승규 (강릉원주대학교 방재연구소) , 신승숙 (강릉원주대학교 방재연구소)
Interrill erosion by the rainfall is divided into a detachment of soil particles by raindrop splash when raindrops having kinetic energy strike on the surface soil and a sediment transport by sheet flow of surface runoff. Rainfall kinetic energy is widely used as an indicator expressing the potentia...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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강우운동에너지는 무엇인가요? | 강우의 운동에너지가 지표를 타격하여 발생하는 빗물튀김과 그에 의한 박리현상(detachment), 지표유출(surface runoff)의 면상흐름(sheet flow)에 의한 토양입자의 운반으로 구분할 수 있다(Morgan, 1996; Kinnell, 2005). 강우운동에너지(rainfall kinetic energy)는 토사입자를 토양체로부터 분리시키는 강우의 잠재적 능력의 지표이다. 이것은 강우입자 크기와 낙하속도 측정에 의해 직접 계산이 가능하며, 관측이 용이한 강우강도와의 경험적 관계식으로부터 간접적 산정이 가능하다. | |
세류간 토양침식으로 지표유출 수의 토사 이송 능력을 평가할 수 없는 이유는 무엇인가요? | 세류간 토양침식에서 강우운동에너지는 토양입자의 박리현상 능력을 평가하기 위한 침식능 인자이지만 지표유출수의 토사이송능력(sediment transport capacity)을 평가할 수는 없다. 세류간 토양침식은 강우운동에너지와 면상흐름의 상호작용에 의한 복잡한 토양침식의 물리적 과정이기 때문이다. 따라서 면상흐름에 의한 토사 이송능력을 평가하기 위해서는 집중 또는 하천 흐름에서 토사 이송을 해석하기 위해 사용하는 수류력(stream power)의 개념(Bagnold, 1966; Yang, 1972)을 고려해야 한다. | |
강우에 의한 토양침식과 그에 따른 토사유출의 메커니즘은 어떻게 나뉘나요? | 강우에 의한 토양침식과 그에 따른 토사유출의 메커니즘은 크게 두 가지로 나뉜다. 강우의 운동에너지가 지표를 타격하여 발생하는 빗물튀김과 그에 의한 박리현상(detachment), 지표유출(surface runoff)의 면상흐름(sheet flow)에 의한 토양입자의 운반으로 구분할 수 있다(Morgan, 1996; Kinnell, 2005). 강우운동에너지(rainfall kinetic energy)는 토사입자를 토양체로부터 분리시키는 강우의 잠재적 능력의 지표이다. |
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