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    Atmospheric Momentum Roughness Applied to Stage-Discharge Relationships in Flood Plains

    Source: Journal of Hydrologic Engineering:;2003:;Volume ( 008 ):;issue: 002
    Author:
    Jennifer M. Jacobs
    ,
    Min-Hui Wang
    DOI: 10.1061/(ASCE)1084-0699(2003)8:2(99)
    Publisher: American Society of Civil Engineers
    Abstract: A numerical model is developed to determine the flow depth and discharge relationship for turbulent flows over vegetated flood plains. The model is based on the turbulent boundary layer similarity concepts developed for atmospheric and pipe flow hydraulics. Here, the Darcy–Weisbach formula is modified to account for vegetative resistance by application of surface roughness lengths developed from atmospheric methodologies. Such roughness lengths are well defined for many natural surfaces and can be determined from existing databases of vegetative surfaces or directly measured for specific sites. The model estimates of the flood flow discharges from a natural site are compared to observed data. The results show very good agreement with errors on the order of 7–8%. A sensitivity analysis was conducted to evaluate the effect of channel characteristics on discharge.
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      Atmospheric Momentum Roughness Applied to Stage-Discharge Relationships in Flood Plains

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    http://yetl.yabesh.ir/yetl1/handle/yetl/77162
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    contributor authorJennifer M. Jacobs
    contributor authorMin-Hui Wang
    date accessioned2017-05-08T22:18:43Z
    date available2017-05-08T22:18:43Z
    date copyrightMarch 2003
    date issued2003
    identifier other40285341.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/77162
    description abstractA numerical model is developed to determine the flow depth and discharge relationship for turbulent flows over vegetated flood plains. The model is based on the turbulent boundary layer similarity concepts developed for atmospheric and pipe flow hydraulics. Here, the Darcy–Weisbach formula is modified to account for vegetative resistance by application of surface roughness lengths developed from atmospheric methodologies. Such roughness lengths are well defined for many natural surfaces and can be determined from existing databases of vegetative surfaces or directly measured for specific sites. The model estimates of the flood flow discharges from a natural site are compared to observed data. The results show very good agreement with errors on the order of 7–8%. A sensitivity analysis was conducted to evaluate the effect of channel characteristics on discharge.
    publisherAmerican Society of Civil Engineers
    titleAtmospheric Momentum Roughness Applied to Stage-Discharge Relationships in Flood Plains
    typeJournal Paper
    journal volume8
    journal issue2
    journal titleJournal of Hydrologic Engineering
    identifier doi10.1061/(ASCE)1084-0699(2003)8:2(99)
    treeJournal of Hydrologic Engineering:;2003:;Volume ( 008 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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