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Characteristics of the Momentum Equation in Open Channel Flow  

Jeon, Min-Woo (충북대학교 토목공학과)
Jeon, Jong-Ki (충북대학교 토목공학과)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.8, no.3, 2008 , pp. 137-147 More about this Journal
Abstract
The relative magnitudes of the individual terms of the momentum equation are analyzed and compared by analytical methods. The temporal variations of each term are analyzed for the influence factors to runoff expressed by the parameters of the momentum equation, stream slopes and roughness coefficients. The magnitudes of local acceleration and convective acceleration offset each other. The peak time of each term except the gravity term coincides with inflection point of the hydrograph rising limb each other. The magnitudes of each term vary with the channel characteristics, especially when the roughness coefficients are dominant or for the mild stream slopes the pressure term can not be negligible.
Keywords
momentum equation; stream slope; roughness coefficient; pressure term;
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  • Reference
1 Henderson, F.M. (1966) Open channel flow. Macmillia, New York
2 Ponce, V.M., Li, R.M., and Simons, D.B. (1978) Applicability of kinematic and diffusion models. Journal of Hydraulic Engineering, ASCE, Vol. 104, No. 3, pp. 353-360
3 Chow, V.T., Maidment, D.R., and Mays, L.W. (1988) Applied hydrology. McGraw-Hill
4 Weimann, P.E., and Laurenson, E.M. (1979) Approximate flood routing methods: A review. Journal of Hydraulic Engineering, ASCE, Vol. 105, No. 12, pp. 1521-1536
5 Chaudhry, M.H. (1993) Open-channel flow. Prentice Hall, N.J
6 김원, 우효섭, 김양수 (1996) 1차원 St.Venant 방정식을 이용한 한강 하류부 하도의 홍수류 특성 분석. 한국수자원학회논문집, 한국수자원학회, 제29권, 제1호, pp. 163-179
7 Harder, J.A. and Armacost, L.V. (1966) Wave propagation in rivers. Report No. 1, Ser. 8, Hydraulic Engineering Laboratory, University of California, Berkely
8 Schaake, J.C. (1965) Synthesis of inlet hydrographs, Ph.D. dissertation, Johns Hopkins University
9 Ciriani, T.A., Maione, U., and Wallis, J.R. (1977) Mathmatical models for surface water hydrology. John Wiley & Sons
10 최계운, 안경수, 안상진 (1994) 하천흐름해석에서 단순화된 운동 방정식을 사용한 유한차분모델의 신뢰성있는 적용범위. 한국수문학회지, 한국수문학회, 제27권, 제4호, pp. 123-133
11 Iwasaki, T. (1967) Flood forcasting in the river Kitakami. Proc. International Hydrology Symposium. Fort Colins, Colorado. Vol. 1, pp. 424-441
12 윤용남 (2006) 공업수문학. 청문각