Dimensionless Design Charts for Exfiltration in Storm Sewers

Bibliographic Details
Main Author:	Susai Manickam, Sheeba Rose Mary
Language:	English
Published:	University of Cincinnati / OhioLINK 2012
Subjects:	Environmental Engineering Exfiltration perforated pipe dimensionless charts SWMM storm water management
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342544885

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-ucin13425448852021-08-03T06:15:48Z Dimensionless Design Charts for Exfiltration in Storm Sewers Susai Manickam, Sheeba Rose Mary Environmental Engineering Exfiltration perforated pipe dimensionless charts SWMM storm water management The effectiveness of controlled partial exfiltration of storm water from sewers is evaluated as an option for managing urban runoff. Steady and unsteady exfiltration from storm sewers is simulated using a modified version of the USEPA Storm Water Management Model (SWMM) program. Exfiltration is represented in SWMM as a distributed sink term in the St. Venant equations for one-dimensional, gradually varied, unsteady flow. The sink term is modeled as an orifice with discharge coefficient dependent on the velocity head in the pipe. The spatial variation of exfiltration rate along the pipe length is also considered in the model. SWMM simulations indicate that exfiltrating sewers can provide significant reductions in the peak flow and runoff volume. Dimensionless charts are developed to offer a quick design aid to determine the expected performance of an exfiltrating sewer under a wide variety of rainfall loadings and soil conditions. A simple step-wise solution is presented to determine the water surface profile in a perforated pipe. This simplified approach facilitates the determination of exfiltration losses from the pipe under steady state conditions. A life-cycle cost analysis reveals there are economic benefits associated with selecting an exfiltrating storm sewer system over a conventional storm drainage system. 2012-10-11 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342544885 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342544885 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Environmental Engineering Exfiltration perforated pipe dimensionless charts SWMM storm water management
spellingShingle	Environmental Engineering Exfiltration perforated pipe dimensionless charts SWMM storm water management Susai Manickam, Sheeba Rose Mary Dimensionless Design Charts for Exfiltration in Storm Sewers
author	Susai Manickam, Sheeba Rose Mary
author_facet	Susai Manickam, Sheeba Rose Mary
author_sort	Susai Manickam, Sheeba Rose Mary
title	Dimensionless Design Charts for Exfiltration in Storm Sewers
title_short	Dimensionless Design Charts for Exfiltration in Storm Sewers
title_full	Dimensionless Design Charts for Exfiltration in Storm Sewers
title_fullStr	Dimensionless Design Charts for Exfiltration in Storm Sewers
title_full_unstemmed	Dimensionless Design Charts for Exfiltration in Storm Sewers
title_sort	dimensionless design charts for exfiltration in storm sewers
publisher	University of Cincinnati / OhioLINK
publishDate	2012
url	http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342544885
work_keys_str_mv	AT susaimanickamsheebarosemary dimensionlessdesignchartsforexfiltrationinstormsewers
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Dimensionless Design Charts for Exfiltration in Storm Sewers

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