Subject: Losses in supply infrastructure Posted: 11/6/2007 Viewed: 33553 times
Losses in supply infrastructure Refik Samet samet <a href="mailto:samet@eng.ankara.edu.tr">samet@eng.ankara.edu.tr</a>Dear friends,
I am interested in modeling the losses in supply infrastructure using WEAP. Does anybody have any experience to determine where the losses are greatest in supply infrastructure?
Arthur Chapman
Subject: Losses in supply infrastructure Posted: 11/8/2007 Viewed: 33543 times
Losses in supply infrastructure Arthur Chapman achapman <a href="mailto:achapman@csir.co.za">achapman@csir.co.za</a>Refik Samet asked:
"I am interested in modeling the losses in supply infrastructure using WEAP. Does anybody have any experience to determine where the losses are greatest in supply infrastructure? "
The greatest losses are usually in urban areas, particularly where the distribution infrastructure is ageing.
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Subject: RE: Losses in supply infrastructure Posted: 11/8/2007 Viewed: 33538 times
RE: Losses in supply infrastructure Jeff Rempel jeffreyrempel <a href="mailto:jeffrey.rempel@postgrad.plymouth.ac.uk">jeffrey.rempel@postgrad.plymouth.ac.uk</a>Dear Refik,
As part of a groundwater management strategy that I developed for the City of Calgary in 2005 we estimated urban groundwater recharge from surface wat er fed supply mains.
According to the folks i spoke to from city infrastructure - waterworks, th ey lose approximately 12 % of water from the water main connections and L's . I would suggest that connections would be responsible for the majority o f losses but do not have a reference for you.
Sincerely,
Jeff M. Rempel, B.Sc. President / Owner - PhilEco Environmental Consulting Joint Masters in Water and Coastal Management - M.Sc. Candidate University of Plymouth, UK Ph: 0 7964396802
Dr. Mohammad Rayej
Subject: Supply Losses Posted: 11/8/2007 Viewed: 33517 times
Supply Losses Mohammad Rayej rayej <a href="mailto:rayej@water.ca.gov">rayej@water.ca.gov</a>Generally, major losses in supply infrastructure (Storage and Conveyance) are direct evaporation and seepage. where both can be modeled by WEAP.
On Storage side, direct evaporation is a major loss which can be explicitly specified in WEAP's Reservoir module.
On Conveyance side, "irrecoverable" seepage loss and evaporation can be modeled as loss in Transmission Link expressed a fraction of supply delivered at the upstream end of the Link. The "recoverable" seepage losses, however, can be captured and routed to a ground water element in WEAP.
************************************************************** Mohammad Rayej, Ph.D., P.E. Senior Engineer, W.R. California Department of Water Resources Statewide Water Planning Branch 901 P Street, 2nd Floor Sacramento, CA 94236 (916)-653-8017 rayej@water.ca.gov
