| GU Fengfeng,MU Lin,QI Dingman,LI Junhua,KONG Lingshuang,WAN Yuanyang. 2011. Study on roughness coefficient for unsubmerged reed in the Changjiang Estuary. Acta Oceanologica Sinica, (5):108－113 |
| Study on roughness coefficient for unsubmerged reed in the Changjiang Estuary |
| Study on roughness coefficient for unsubmerged reed in the Changjiang Estuary |
| Received:January 04, 2011 Revised:June 14, 2011 |
| DOI：10.1007/s13131-011-0153-0 |
| Key words:Manning's coefficient foliage density flexibility reed |
| 中文关键词: Manning's coefficient foliage density flexibility reed |
| 基金项目:The Public Science and Technology Research Funds Projects of Ocean under contract Nos 200905001 and 201005019; UNESCO-IHE Partnership Research Fund (UPaRF) under contract No. 60038881; the National Natural Science Foundation of China under contract No. 50939003. |
| Author Name | Affiliation | E-mail | | GU Fengfeng | Shanghai Estuary and Coastal Science Research Center, Shanghai 201201, China | gufengfeng@yahoo.com.cn | | MU Lin | National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171, China | | | QI Dingman | Shanghai Estuary and Coastal Science Research Center, Shanghai 201201, China | | | LI Junhua | College of Ocean Environment and Engineering, Shanghai Maritime University, Shanghai 200135, China | | | KONG Lingshuang | Shanghai Estuary and Coastal Science Research Center, Shanghai 201201, China | | | WAN Yuanyang | Shanghai Estuary and Coastal Science Research Center, Shanghai 201201, China | |
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| Abstract: |
| The influence of density, foliage and stem flexibility on the roughness coefficients under unsubmerged conditions, such as Manning's n, is investigated experimentally. An instrumentation system has been developed for measuring the flow rate ranging from 0.1 to 0.3 L/s under the condition of different artificial foliated reeds. Based on the experimental results, the influence on the relationship between n with different density, foliage, flexibility and flow depth is discussed. It is found that the foliage and the density are the important factors affecting Manning's n. At a range of relatively low velocity and relatively large bending stiffness of stem, Manning's n is not influenced significanthy by the flexibility of stem. |
| 中文摘要: |
| The influence of density, foliage and stem flexibility on the roughness coefficients under unsubmerged conditions, such as Manning's n, is investigated experimentally. An instrumentation system has been developed for measuring the flow rate ranging from 0.1 to 0.3 L/s under the condition of different artificial foliated reeds. Based on the experimental results, the influence on the relationship between n with different density, foliage, flexibility and flow depth is discussed. It is found that the foliage and the density are the important factors affecting Manning's n. At a range of relatively low velocity and relatively large bending stiffness of stem, Manning's n is not influenced significanthy by the flexibility of stem. |
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