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Article: Hydraulic model study of the Tai Hang Tung Storage Scheme

TitleHydraulic model study of the Tai Hang Tung Storage Scheme
Authors
KeywordsOne in 50 year rainstorm
Overflow
Side weirs
Stormwater drainage system
Tai Hang Tung Storage Scheme (THTSS)
Urban flood control
Issue Date2008
PublisherInternational Association of Hydraulic Engineering and Research
Citation
Journal Of Hydraulic Research, 2008, v. 46 SUPPL. 1, p. 11-23 How to Cite?
AbstractThe Tai Hang Tung Storage Scheme (THTSS) is an essential component of the West Kowloon Drainage Improvement (Stage 2) Project that aims to solve the flooding problem in Mongkok - a congested and densely populated district of the Hong Kong Special Administration Region. Over the years rapid development and changes in land use have resulted in significant increases in surface stormwater runoff, and the existing drainage system failed to cope with severe rainstorms. Rather than digging up roads and widening/adding existing drains, an economic drainage improvement plan calls for the construction of a 100, 000 m 3 underground storage tank upstream of the flooding black spots, below an existing football field in the vicinity of the Tai Hang Tung-Tat Chee Road junction. The upstream storage can serve to attenuate peak floods and protect downstream areas from flooding. Due to the complicated flows in the stormwater drainage system (including subcritical and supercritical open channel flows, pressurized flow in closed conduit, side weir overflows, and transitional flows at junctions), a 1:22 undistorted Froude scale physical model was designed and constructed to study the feasibility and performance of the THTSS scheme. As a complement, a 1D numerical model of the unsteady flow was developed to study water stages and flow characteristics for different side-weir arrangements. The key findings of the physical and numerical model studies are reported herein. The studies have resulted in an optimal design of the flood storage scheme; the physical model tests and numerical model results indicate that THTSS can enhance the flood control capacity to cope with a one in 50-year rainstorm. © 2008 International Association of Hydraulic Engineering and Research.
Persistent Identifierhttp://hdl.handle.net/10722/58550
ISSN
2015 Impact Factor: 1.471
2015 SCImago Journal Rankings: 1.022
References

 

DC FieldValueLanguage
dc.contributor.authorLee, JHWen_HK
dc.contributor.authorChan, CHCen_HK
dc.contributor.authorKuang, CPen_HK
dc.contributor.authorClark, Pen_HK
dc.contributor.authorTownsend, Nen_HK
dc.contributor.authorShiu, WYen_HK
dc.date.accessioned2010-05-31T03:32:22Z-
dc.date.available2010-05-31T03:32:22Z-
dc.date.issued2008en_HK
dc.identifier.citationJournal Of Hydraulic Research, 2008, v. 46 SUPPL. 1, p. 11-23en_HK
dc.identifier.issn0022-1686en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58550-
dc.description.abstractThe Tai Hang Tung Storage Scheme (THTSS) is an essential component of the West Kowloon Drainage Improvement (Stage 2) Project that aims to solve the flooding problem in Mongkok - a congested and densely populated district of the Hong Kong Special Administration Region. Over the years rapid development and changes in land use have resulted in significant increases in surface stormwater runoff, and the existing drainage system failed to cope with severe rainstorms. Rather than digging up roads and widening/adding existing drains, an economic drainage improvement plan calls for the construction of a 100, 000 m 3 underground storage tank upstream of the flooding black spots, below an existing football field in the vicinity of the Tai Hang Tung-Tat Chee Road junction. The upstream storage can serve to attenuate peak floods and protect downstream areas from flooding. Due to the complicated flows in the stormwater drainage system (including subcritical and supercritical open channel flows, pressurized flow in closed conduit, side weir overflows, and transitional flows at junctions), a 1:22 undistorted Froude scale physical model was designed and constructed to study the feasibility and performance of the THTSS scheme. As a complement, a 1D numerical model of the unsteady flow was developed to study water stages and flow characteristics for different side-weir arrangements. The key findings of the physical and numerical model studies are reported herein. The studies have resulted in an optimal design of the flood storage scheme; the physical model tests and numerical model results indicate that THTSS can enhance the flood control capacity to cope with a one in 50-year rainstorm. © 2008 International Association of Hydraulic Engineering and Research.en_HK
dc.languageengen_HK
dc.publisherInternational Association of Hydraulic Engineering and Researchen_HK
dc.relation.ispartofJournal of Hydraulic Researchen_HK
dc.subjectOne in 50 year rainstormen_HK
dc.subjectOverflowen_HK
dc.subjectSide weirsen_HK
dc.subjectStormwater drainage systemen_HK
dc.subjectTai Hang Tung Storage Scheme (THTSS)en_HK
dc.subjectUrban flood controlen_HK
dc.titleHydraulic model study of the Tai Hang Tung Storage Schemeen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-1686&volume=46&spage=11&epage=23&date=2008&atitle=Hydraulic+model+study+of+the+Tai+Hang+Tung+Storage+Schemeen_HK
dc.identifier.emailLee, JHW: hreclhw@hku.hken_HK
dc.identifier.authorityLee, JHW=rp00061en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-43749115552en_HK
dc.identifier.hkuros154909en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-43749115552&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume46en_HK
dc.identifier.issueSUPPL. 1en_HK
dc.identifier.spage11en_HK
dc.identifier.epage23en_HK
dc.publisher.placeSpainen_HK
dc.identifier.scopusauthoridLee, JHW=36078318900en_HK
dc.identifier.scopusauthoridChan, CHC=55031165800en_HK
dc.identifier.scopusauthoridKuang, CP=35819452600en_HK
dc.identifier.scopusauthoridClark, P=8072148000en_HK
dc.identifier.scopusauthoridTownsend, N=24340276300en_HK
dc.identifier.scopusauthoridShiu, WY=24279879200en_HK

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