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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Managing deltas : Storm water management and improvement case of freemans bay auckland
Storm water management and improvement case of freemans bay auckland
Author : MATHEW BRADBURY (1) & GREGORY SHAHANE DE COSTA (2)
ABSTRACT
Freemans Bay is a vast and recovered industrial zone, encompassed by a petrol chemical storage facility and a tank
farm. Major storm water outfall from the surrounding Freemans Bay catchment can cause contamination in the ground
around the tank farm and the sea. The entire Freemans Bay catchment anticipated 244hactares, 72.7% of impervious
surfaces (178hactares). The impervious surfaces are divided into 64hactares of building roofs and roads, 114hactares of
driveways and footpaths. The remaining 27.3% or 66hactares of the catchment are pervious surfaces (parks, lawns and
vegetated buffers which have been found to be the source of large amounts of storm water flowing through Wynyard
Quarter at the bottom of the catchment), where storm water can penetrate through the ground layers as a filter for initial
treatment before reaching the storm water network for discharge. However, most of the storm water is assembled and
discharged via a four meter by three meter drainage pipe below Wynyard Quarter This study focuses on storm water
issues identified within the Freemans Bay area.
The purpose of the study is to find solutions to help manage land contamination, sea pollution and improve the storm
water system within the area. A thorough investigation occurred throughout the entire catchment with the aid of
Auckland GIS viewer. The findings include a design of a wetland storm water treatment system to treat the storm water
produce by the 2 year storm event within the area before discharge, reduce the speed of run-off to prevent erosion and
also to increase the aesthetic and recreational nature of the area.
File Size : 702,557 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Managing deltas
Date Published : 28/08/2015
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