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    Impact of New Rainfall Patterns on Detention Pond Design

    Source: Journal of Irrigation and Drainage Engineering:;2008:;Volume ( 134 ):;issue: 002
    Author:
    D. N. Powell
    ,
    A. A. Khan
    ,
    N. M. Aziz
    DOI: 10.1061/(ASCE)0733-9437(2008)134:2(197)
    Publisher: American Society of Civil Engineers
    Abstract: A new set of dimensionless rainfall hyetographs has been developed for the state of South Carolina. The new hyetographs show trends similar to those developed recently in other states and in general have milder intensities and lower peak rainfall than the Soil Conservation Service (SCS) rainfall hyetographs. This paper evaluates the impact the new hyetographs have on rainfall runoff and detention pond design and compares the results with those using the SCS hyetographs. Peak discharges for basin runoff were reduced up to approximately 20% of the predicted peak runoff rate using the current SCS hyetographs. Detention pond peak stage was also reduced by 25–50% of the predicted SCS stage. This analysis suggests that design hyetographs should be regularly updated to incorporate recent rainfall data.
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      Impact of New Rainfall Patterns on Detention Pond Design

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    http://yetl.yabesh.ir/yetl1/handle/yetl/28630
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    contributor authorD. N. Powell
    contributor authorA. A. Khan
    contributor authorN. M. Aziz
    date accessioned2017-05-08T20:50:02Z
    date available2017-05-08T20:50:02Z
    date copyrightApril 2008
    date issued2008
    identifier other%28asce%290733-9437%282008%29134%3A2%28197%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/28630
    description abstractA new set of dimensionless rainfall hyetographs has been developed for the state of South Carolina. The new hyetographs show trends similar to those developed recently in other states and in general have milder intensities and lower peak rainfall than the Soil Conservation Service (SCS) rainfall hyetographs. This paper evaluates the impact the new hyetographs have on rainfall runoff and detention pond design and compares the results with those using the SCS hyetographs. Peak discharges for basin runoff were reduced up to approximately 20% of the predicted peak runoff rate using the current SCS hyetographs. Detention pond peak stage was also reduced by 25–50% of the predicted SCS stage. This analysis suggests that design hyetographs should be regularly updated to incorporate recent rainfall data.
    publisherAmerican Society of Civil Engineers
    titleImpact of New Rainfall Patterns on Detention Pond Design
    typeJournal Paper
    journal volume134
    journal issue2
    journal titleJournal of Irrigation and Drainage Engineering
    identifier doi10.1061/(ASCE)0733-9437(2008)134:2(197)
    treeJournal of Irrigation and Drainage Engineering:;2008:;Volume ( 134 ):;issue: 002
    contenttypeFulltext
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