A Study of Manning Coefficient Related With Vegetation Density along the Vegetated Channel

Abstract:

Experiments are conducted to study the change of Manning coefficient of reed population along the channel in gradually varied flow. Water depth and velocity are investigated under various reed densities, corresponding to a set of discharge values. The corresponding Manning coefficients along the channel and the functional relationships with vegetation density are studied. The results show that the Manning coefficient is more volatile in vegetation zone and the average Manning coefficient exhibits a linear relationship with the vegetation density. The conclusions can provide some guidance and reference for cofferdam design in natural and constructed wetland and the research on vegetated channel erosion.

• Periodical: Applied Mechanics and Materials (Volumes 212-213)
• Pages: 744-747
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.212-213.744
• Online since: October 2012
• Authors: Wei Gang Xu, Hua Yong Zhang, Zhong Yu Wang, Wen Pei Huang
• Keywords: Gradually Varied Flow, Manning Coefficient, Reed, Vegetated Channel, Vegetation Density

References

[1] O. Yagci, U. Tschiesche, M. S. Kabdasli: Advances in Water Resources 33, 601 (2010).

[2] V. Chow: Open-Channel Hydraulics. (New York: McGraw-Hill College, 1959).

[3] J. Järvelä: Journal of Hydrology 269, 44 (2002).

[4] P. Rowiński, J. Kubrak: Hydrological Sciences Journal 47, 893 (2002).

[5] P. -F. Wang, C. Wang: Journal of Hydrodynamics, Ser. B 23, 170 (2011).

[6] J. Green: River Research and Applications 21, 671 (2005).

[7] H. Afzalimehr, R. Moghbel, J. Gallichand, J. Sui: International Journal of Sediment Research 26, 269 (2011).

DOI: 10.1016/s1001-6279(11)60093-0

[8] N. Kouwen, M. Fathi-Moghadam: Journal of Hydraulic Engineering 126, 732 (2000).

[9] D. Pujol, J. Colomer, T. Serra, X. Casamitjana: Continental Shelf Research 30, 1019 (2010).

DOI: 10.1016/j.csr.2010.02.014