clevedon -twin river valley stormwater management

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stormwater management device

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Page 1: Clevedon -Twin River Valley Stormwater Management

TwinRiverValleyDevelopmentisadevelopmentidealforfamileswholovethecountryfeelbutatthesamemeishaveeasyaccestotheoldandnewtowncentrebywalkingthroughthegreencorridorthatconnectstotheClevedonEcoislandatthetopandtoPapakurabycar.

Thestormwatertreatmentthathasbeendevelopedareswales.TheswaleshavebeenplacedoneithersideoftheroadtofiltertherunofffromtheroadsandtheextrarunofffromtheroofsofthebuildingsandthiswilldrainintotheminroriverthatisNorthofthesite.

Swalesarevegetatedareasdesignedtoremovecontaminantsfromstormwaterrunoff.AsstormwatermovesthroughtheSwalesarevegetatedareasdesignedtoremovecontaminantsfromstormwaterrunoff.Asstormwatermovesthroughthevegetaoncontaminantsareremovedbyfiltraon,infiltraon,absorponandbiologicaluptake.Athickcoverageofveg-etaoncanreducetheflowvelocityofrunoff,allowparculatestoseleandprotectagainsterosion.Swalesacceptacon-centratedflowofstormwaterthroughagrassedchannel,

TheswaleshavebeenplantedwithnaveplantssuchasPhormium tenax and cabbagetrees.Theseplantshavebeenusedsothattheycanhelpinfilterangthewaterandtheylinkwiththevegetaongareathatalsohasnavingplanng.

Mainconnecn

groads

SuburbanLivingMasterPlan

Rivers

Vehicleconneconthroughvegetaonbuffer

Mainconnecngroads

PylonBuffer

Vegetaon

Pedestrainlinkthroughthevegeta

on

1.Vegetaonbufferbehindtheplotsandpedestrainconnecon

3.Roadleadingtowardsthevegetaonareaandswales

SeconA-AFrontviewoftheswaleSeconB-BSideviewoftheswale

2.Swalesoneithersideoftheroad

SWALE SWALE

PATHWAY

Runoff

Runoff

Runoff

Swale

AA

B B

2

3

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CLEVEDON

CLEVEDON

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