IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) FULL PAPERS : THEME 2- HYDRO-ENVIRONMENT : MANNING'S COEFFICIENT OF ALTERNATIVELY ARRANGED SANDBARS WITH TREE VEGETATION
MANNING'S COEFFICIENT OF ALTERNATIVELY ARRANGED SANDBARS WITH TREE VEGETATION
Author : KOHJI MICHIOKU , KEIICHI KANDA SHUNICHI KOMETANI , YOSHIYUKI IRIE & CHINAMI SAKAMOTO
Recently, many river channels tend to be densely vegetated due to regime shifts in hydrological, fluvial and ecological processes. It is a critical engineering issue for flood control and management to evaluate the conveyance capacity of vegetated channels. In this study, an equivalent Manning?s coefficient n of vegetation canopy drag in an open channel of v compound cross section with alternatively arranged floodplain is analyzed by using a two-dimensional two-layer (2D2L) model. It is found that n monotonically increases with increasing discharge when vegetation is emerged. On the other v hand, n gradually decreases with discharge in the case of submergent vegetation. The numerical solutions of flow v structure and nv is compared with experimental data to verify the model and satisfactory agreement between the analysis and the experiment is recognized.
File Size : 2,449,990 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) FULL PAPERS
Article : THEME 2- HYDRO-ENVIRONMENT
Date Published : 18/04/2016
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