개수로내 식생에 의한 Manning계수의 변화

• 영문명: Variation of Manning`s Coefficient due to Vegetation in Open Channel
• 발행기관: 한국방재학회
• 저자명: 권갑근 김형석 윤성범 Kwon, Kab-Keun Kim, Hyung-Seok Yoon, Sung-Bum
• 간행물 정보: 『3. 한국방재학회 학술대회논문집』2008년, 401~404쪽, 전체 4쪽
• 주제분류: 공학 > 기타공학
• 파일형태: PDF
• 발행일자: 2008.02.28

영문 초록

The vegetation in the surrounding area of river is a primary factor to increase water level during flood. The influence of vegetation on the river flow in a bank has been investigated by using a hydraulic experiment. For a hydraulic experiment square-shaped piers are used as a model of unsubmerged rigid vegetation in a open channel. For fully developed uniform flows, the water elevation of the experiment was measured as varying the interval of piers and the porosity which presents the fraction of water flowing area in the cross-sectional area. The Manning`s roughness coefficient, which implicates energy losses due to the vegetation, was obtained by using the experimental data. As a result, the energy losses were varied when the distance of piers and the porosity of area were changed, and the Manning`s coefficient increased nonlinearly when a water elevation increased.

키워드

vegetation hydraulic experiment multi-piers energy losses Manning`s coefficient