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    Evapotranspiration Void Space Accounting Method

    Source: Journal of Irrigation and Drainage Engineering:;2023:;Volume ( 149 ):;issue: 001::page 04022047-1
    Author:
    Amanda Hess
    ,
    Bridget Wadzuk
    ,
    Andrea Welker
    DOI: 10.1061/JIDEDH.IRENG-9780
    Publisher: American Society of Civil Engineers
    Abstract: Quantifying evapotranspiration (ET) and infiltration from vegetated stormwater control measures (SCMs), such as rain gardens, is necessary to physically represent their volume reduction potential. Most states and regulatory entities utilize a design storm for rain garden design in which the rain garden’s capacity is considered using a static volume contribution. The static storage volume approach excludes the dynamic functions of infiltration during an event and ET between events. This work seeks to provide a method to incorporate the function of ET during interevent times into a design storm approach. The suggested method to do this is to estimate the void space recovery due to both ET and gravity drainage. An example is used to demonstrate the method for rain gardens in Pennsylvania where the void space recovery was estimated for 6 and 12 days between events. The void space recovery was estimated using a mathematical model based upon the 1D Richards equation coupled with the ASCE Penman-Monteith model. The mathematical model was validated using data from eight rain garden lysimeters in Villanova, Pennsylvania. This location is in the mid-Atlantic region with a Cfa climate in the Koppen-Geiger classification system. This void space recovery ranged from 15% to 40% (for both ET and gravity drainage) depending on soil type, drainage, rooting depth, crop coefficient and days between events. This void space recovery can be used to calculate a semidynamic recovery based on expected performance using the commonly employed design storm approach.
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      Evapotranspiration Void Space Accounting Method

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4292820
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    contributor authorAmanda Hess
    contributor authorBridget Wadzuk
    contributor authorAndrea Welker
    date accessioned2023-08-16T19:08:36Z
    date available2023-08-16T19:08:36Z
    date issued2023/01/01
    identifier otherJIDEDH.IRENG-9780.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4292820
    description abstractQuantifying evapotranspiration (ET) and infiltration from vegetated stormwater control measures (SCMs), such as rain gardens, is necessary to physically represent their volume reduction potential. Most states and regulatory entities utilize a design storm for rain garden design in which the rain garden’s capacity is considered using a static volume contribution. The static storage volume approach excludes the dynamic functions of infiltration during an event and ET between events. This work seeks to provide a method to incorporate the function of ET during interevent times into a design storm approach. The suggested method to do this is to estimate the void space recovery due to both ET and gravity drainage. An example is used to demonstrate the method for rain gardens in Pennsylvania where the void space recovery was estimated for 6 and 12 days between events. The void space recovery was estimated using a mathematical model based upon the 1D Richards equation coupled with the ASCE Penman-Monteith model. The mathematical model was validated using data from eight rain garden lysimeters in Villanova, Pennsylvania. This location is in the mid-Atlantic region with a Cfa climate in the Koppen-Geiger classification system. This void space recovery ranged from 15% to 40% (for both ET and gravity drainage) depending on soil type, drainage, rooting depth, crop coefficient and days between events. This void space recovery can be used to calculate a semidynamic recovery based on expected performance using the commonly employed design storm approach.
    publisherAmerican Society of Civil Engineers
    titleEvapotranspiration Void Space Accounting Method
    typeJournal Article
    journal volume149
    journal issue1
    journal titleJournal of Irrigation and Drainage Engineering
    identifier doi10.1061/JIDEDH.IRENG-9780
    journal fristpage04022047-1
    journal lastpage04022047-16
    page16
    treeJournal of Irrigation and Drainage Engineering:;2023:;Volume ( 149 ):;issue: 001
    contenttypeFulltext
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