2013FloatingwetlandsatPunggol

See discussions, stats, and author profiles for this publication at: wetlands at PunggolARTICLE in THE IES JOURNAL PART A CIVIL & STRUCTURAL ENGINEERING · NOVEMBER 2013DOI: 10.1080/19373260.2013.821717READS288 AUTHORS, INCLUDING:C. M. WangNational University of Singapore402 PUBLICATIONS 7,160 CITATIONS SEE PROFILEZhi Yung TayThe University of Edinburgh22 PUBLICATIONS 98 CITATIONS SEE PROFILER. P. GaoNational University of Singapore11 PUBLICATIONS 28 CITATIONS SEE PROFILEAvailable from: Zhi Yung TayRetrieved on: 05 March 2016Thisarticlewasdownloadedby:[RuipingGao]On:22July2013,At:18:54Publisher:Taylor&FrancisInformaLtdRegisteredinEnglandandWalesRegisteredNumber:1072954Registeredoffice:MortimerHouse,37-41MortimerStreet,LondonW1T3JH,UKTheIESJournalPartA:Civil&StructuralEngineeringPublicationdetails,includinginstructionsforauthorsandsubscriptioninformation::22Jul2013.Tocitethisarticle:TheIESJournalPartA:Civil&StructuralEngineering(2013):FloatingwetlandsatPunggol,TheIESJournalPartA:Civil&StructuralEngineering,DOI:10.1080/19373260.2013.821717Tolinktothisarticle:(the“Content”)containedinthepublicationsonourplatform.However,Taylor&Francis,ouragents,andourlicensorsmakenorepresentationsorwarrantieswhatsoeverastotheaccuracy,completeness,orsuitabilityforanypurposeoftheContent.Anyopinionsandviewsexpressedinthispublicationaretheopinionsandviewsoftheauthors,andarenottheviewsoforendorsedbyTaylor&Francis.TheaccuracyoftheContentshouldnotberelieduponandshouldbeindependentlyverifiedwithprimarysourcesofinformation.TaylorandFrancisshallnotbeliableforanylosses,actions,claims,proceedings,demands,costs,expenses,damages,andotherliabilitieswhatsoeverorhowsoevercausedarisingdirectlyorindirectlyinconnectionwith,inrelationtoorarisingoutoftheuseoftheContent.Thisarticlemaybeusedforresearch,teaching,andprivatestudypurposes.Anysubstantialorsystematicreproduction,redistribution,reselling,loan,sub-licensing,systematicsupply,ordistributioninanyformtoanyoneisexpresslyforbidden.Terms&Conditionsofaccessandusecanbefoundat*aHousingandDevelopmentBoard,HDBHub,480Lorong6ToaPayoh310480,Singapore;bDepartmentofCivilandEnvironmentalEngineering,NationalUniversityofSingapore,KentRidge119260,Singapore(Received10April2013;finalversionreceived3June2013)PunggolEco-Townhasbeenpositionedasthesustainablewaterfronttownforthetropics.HousingandDevelopmentBoard(HDB)planstointroducefloatingwetlandsalongthePunggolWaterway(PWW)aspartofitsgreeninitiativestointensifygreenery,enrichbiodiversityandenhancewaterquality(HousingDevelopmentBoard2011).Thispaperexploresthegoverningtheory,designprinciple,numericalanalysisandfieldtestofthefloatingmodulesandtheirconnectorsystemsthattogetherformthefloatingwetlands.Eachconfigurationoffloatingwetlandscompriseshigh-densitypolyethylene(HDPE)modules.Eachmale–femaleconnectorsystemisheldtogetherbystainlesssteelpins.Thefloatingwetlandsareabletocarryplantandhumanloadsandyetpossessadesignedfreeboard.Staticandhydroelasticanalysesperformedshowedtheadequacyofthefloatingwetlanddesign.Keywords:largefloatingstructure;pontoon-typeplatform;male–femaleconnectors;modulardesign;structuraldesign;hydroelasticanalysis1.IntroductionHDBtownsareplannedcomprehensivelytoincludeallkeyfacilitiestocreateawork–live–learn–playenviron-menttomeetresidents’needs.HDBdesignsitsbuildingstoembracelocaltropicalclimateconditionsandutilisepassivedesignstrategiestoachieveeffectiveenergy,waterandwastemanagement.Punggoltown,oneofHDB’syoungertowns,hasbeenidentifiedanddevelopedintothefirsteco-towninSingapore.Locatedinthenorth-easternpartofSingapore,Punggoltownisenvisagedasauniquewaterfronttownwitharangeofcommercial,socialandrecreationalfacilitiesforresidents.Aman-madewaterwayisconstructedtoconnectSungeiPunggolreser-voirtoSungeiSerangoonreservoiranditcreatesawaterbodywhereactivitiessuchascanoeingandkayakingmaybecarriedout.Floatingwetlandsareintroducedalongthewaterwaywithapromenadethatallowsthepublictostrollalongthewaterwayandenjoythegreenery(HousingDevelopmentBoard2011).Thesefloatingwetlandsarehugefiltrationsystemsfilledwithawidevarietyofemergentwetlandplantspecies(FloatingWetlandsCharlestonAquaticNurseriesInc.2012).Theplantsinthefloatingwetlandssoakupnutrientsfromthesurroundingwaterandturnintofoliageandalsoreducepollutantsinthewaterbodies.Thefloatingwetlandscanalsobeusedtoimprovewaterqualityinlakesandinsmallwaterbodi