landscape design approach for storm water management...4.0 landscape design solution to solve storm...
TRANSCRIPT
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Landscape Design Approach
for Storm Water
Management
LAr. Mohd Yusoff Hamzah
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1.0 HOW NATURE MANAGE STORM WATER1.1 Forest1.2 Rivers1.3 Flood plain1.4 Natural Wetland1.5 Natural Lakes
2.0 WHAT ARE THE PROBLEMS OF STORM WATER (The needs to identify the problems in order to come out with a better solution)2.1 Floods2.2 Erosion2.3 Pollution2.4 Damaging the ecosystem and environments
3.0 WHAT IS THE CAUSE OF THE STORM WATER PROBLEMS 3.1 Run off due to Jungle clearance3.2 Run off due Impervious surface
4.0 LANDSCAPE DESIGN SOLUTION TO SOLVE STORM WATER PROBLEMS4.1 Retaining water at the site
Landscape Design Approach for Storm Water Management
CONTENTS:-
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I) On site detention systemII) Green roofIII) Green wallIV) Pocket GardenV) Urban woodlandVI) Soak wellVII) Usage of super absorbent polymer in the landscapeVIII)Drainage and Swale
4.2 Avoid impervious surface for roads and pavements4.3 Design to solve erosion problems and at the same time environmental
friendly.5.0 LANDSCAPE APPROACH TO REMOVE POLLUTANTS BEFORE IT REACHES WATERBODY6.0 LANDSCAPE APPROACH TO REMOVE POLLUTANTS IN THE LAKES AND RETENTION
POND.7.0 DESIGN TO SOLVE OR AVOID EROSION INFLICTS BY STORM WATER.8.0 ATTEMPTS BY MALAYSIAN LANDSCAPE ARCHITECTS TO INCORPORATE SOLUTIONS TO 9.0 STORM WATER PROBLEMS.
Landscape Design Approach for Storm Water Management
CONTENTS:-
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1.0 HOW NATURE MANAGE STORM
WATER
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1.1 FOREST AND WOODLAND
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1.1.1 THE NATURAL WATER CYCLE
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When forests are present, rainwater stays
on site and soaks into the soil, eventually
percolating down to the lower layers of
rock.
This helps stave off drought, and in some
areas provides the only drinking water
available, through wells.
As forest cover is removed, more and
more runoff occurs, with the greatest
amount of runoff coming from
impervious surfaces.
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1.2 RIVERS
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RIVER FAUNA
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SUNGAI LEMBING
RIVER FLORA
Elatostemma
Tacca
Pitcher Plant
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1.3 FLOOD PLAIN
SUNGAI KELANTAN
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FERTILE FLOOD PLAIN
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1.4 NATURAL WETLAND
TASEK CHINI , PAHANG
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1.5 NATURAL LAKE
TASEK BERA
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2.0 WHAT ARE THE
PROBLEMS OF
STORM WATER
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Stormwater RunoffStormwater runoff is rainfall that runs off the ground or
impervious surfaces such as buildings, roads, and parking lots, and
drains into natural or manmade drainage ways.
• In most cases, it drains directly into streams, river, lakes,
sounds or the ocean.
• Stormwater can drain into streets and human made
drainage systems consisting of storm drains and underground
pipes commonly referred to as “storm sewers.”
• It is not sanitary sewers that transport human and industrial
wastewaters to a treatment plant before they discharge to the
river.
• Stormwater entering storm sewers does not usually receive
any treatment before it enters streams, lakes and other surface
waters
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2.1 FLOODS/FLASH FLOODS
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Damage cause by floods
• Damage to infrastructure
• Eroded Stream banks
• Sediment-clogged waterways, filled lakes,
reservoirs
• Widened Stream Channels
• Impaired Recreational Uses
• Threatened Public Health - Contamination
of drinking water,
• Threatened Public Safety
• Economic Impacts
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FLOODS
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FLOOD WATER AND ITS DEBRIS CAUSING A LOT OF DAMAGE
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FLOOD WATER AND ITS DEBRIS CAUSING A LOT OF DAMAGE
PROPERTIES
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2.2 Erosion
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2.2 Erosion
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Tasek Metropolitan Kepong
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2.3 Pollution
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Why is Stormwater a Problem?
Pollution• Stormwater is a leading cause
for water pollution.
• It runs off solid surfaces and
collects pollutants such as oil,
pesticides, sediments,
bacteria, and other chemicals,
and then deposits them into
our waterways.
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Muddy water due to erosion, construction site or bare
ground
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Water pollution end up in our Lakes
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Birds and animal droppings
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Bacteria from pet wastes and failing septic systems;
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Fertilizers, pesticides and other chemicals from gardens and homes
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Oil, grease, metals and coolants from vehicles
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Soaps from car or equipment washing
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Nutrients from excess food and drink due to
littering
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Grass clippings, twigs, leaves, branches are washed into the lake
HEAVY GROWTH OF PLANKTONIC ALGAE THAT ARE FLUSHED INTO
THE LAKE
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TANNIN (FROM DECAYING ORGANIC MATTER) IN THE
WATER
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Accidental spills, leaky storage containers, tobacco spit and whatever else ends up on the
ground
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2.4 Damaging the ecosystem and environments
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Damaging the ecosystem and environments
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RUN-OFF INCREASES TEMPERATURES OF STREAMS
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Damaging the ecosystem and environments
• This runoff can kill aquatic life, and make
our waterways an unhealthy place to live,
work, and play.
• Untreated stormwater entering our streams
can result in the contamination of our
drinking water supplies or shell fishing
waters; prohibitions on swimming, fishing
or boating uses; injury to aquatic plants and
animals; dangers to public health; and
increased flood
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3.0
WHAT IS THE CAUSE
OF THE STORM WATER
PROBLEMS
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MAIN CAUSE OF FLOODS
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RUN-OFF FROM CLEARED OR DEVELOPED AREAS
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Run-off Impact
• Water Quality
• Water quantity
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3.1 Jungle clearance
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Impervious surface
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3.2 Impervious surfaceRoads and highway
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RUN-OFF FROM ROADS
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RUN-OFF FROM ROOF
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RUN-OFF FROM CARPARKS
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4.0 LANDSCAPE DESIGN SOLUTION TO SOLVE
STORM WATER PROBLEMS
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The benefits of effective stormwaterrunoff management can include
:
• protection of wetlands and aquatic
ecosystems,
• improved quality of receiving
waterbodies,
• conservation of water resources,
• protection of public health, and
• flood control
• Erosion control.
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ON SITE DETENTION (OSD)
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ON SITE DETENTION (OSD) OTHER STRUCTURE
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GREEN ROOF
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GREEN WALL
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GREEN WALL
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POCKET GARDEN
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TO CREATE MORE URBAN WOODLAND
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TREE WITH BIG LEAVES MUST BE AVOIDED
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• Reduce the amount of runoff
• Absorb Pollutants they don't
add additional pollutants to
the water.
• Improve water quality
POCKET GARDEN AND
URBAN WOODLAND
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SOAK WELL
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SOAK WELL
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SOAK WELL
A soakwell is an innovation whereby,
typically, rain water from a dwelling roof
or impermeable ground area travels via
storm water piping to a soakwell or
undergorund tank, gently seeping into
the surrounding soil.
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POLYPROPYLENE SOAKWELL
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Usage of super absorbent
polymer in the landscape
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Usage of super absorbent polymer in the landscape
Advantages of SAP• Increases water holding
capacity• Increases water use efficiency• Enhances soil permeability and
infiltration rates• Reduces irrigation frequency• Reduces compaction tendency• Stops erosion and water run
off• Increases plant performance
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Drainage and Swale
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Swale
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Cascading Swale
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Storm water detention
and bio swales
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Storm water detention
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Bio swales
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Storm water detention
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Bio swales
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Bio swales
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Bio swales
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Bio swales
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Bio swales
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Garden bio-retention
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Bio retention
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Round about bio swale
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Storm water bio retention
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Storm water bio retention
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4.2 Avoid impervious surface for roads and
pavements
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GRASS CRETE- REDUCED IMPERVIOUS SURFACE
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POROUS HARD LANDSCAPE SURFACE
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POROUS FOOTPATH
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5.0LANDSCAPE APPROACH TO
REMOVE POLLUTANTS BEFORE IT REACHES
WATERBODY
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TYPES OF WETLAND FILTERS
There are four type of wetland filters:-
1. Surface horizontal flow wetland filter
(e,g. Putrajaya wetlands)
2.Horizontal sub-surface wetland filter
3.Vertical sub-surface wetland filter.
4.Hybrid of Vertical and hrizontal su-
surface wetlamd filter
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ROOT SYSTEM
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CONSTRUCTED WETLAND REMOVAL OF POLLUTANT
TSS (Total suspended solid) 91.4%FECCAL COLIFORM 99.4%FECCAL STRETOCCOCUS 98.4%PHOSPHORUS 75.9%ORGANIC NITROGEN 91.4%AMMONIUM NITROGEN 93.6%
CONSTRUCTED WETLAND (COMBINATION OF VERTICAL AND HORIZONTAL FLOW SUB SURFACE
WETLAND)
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SURFACE HORIZONTAL FLOW WETLAND FILTER
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Horizontal surface wetland cell at Putrajaya Wetlands Park
HORIZONTAL FLOW WETLAND AT PUTRAJAYA
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EXAMPLE OF SINGAPOREWe don’t have to look far for an example of the successful
use of wetlands as natural water filters.
Stormwater are channelled to 17 reservoirs for storage. Almost ALL of these 17 reservoirs use constructed wetlands which are also known as floating islands to clean up the reservoirs and improve water quality.
SENGKANG RESERVOIR PANDAN RESERVOIR
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6.0LANDSCAPE APPROACH TO REMOVE POLLUTANTS IN
THE LAKES AND RETENTION POND.
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• Clear water is aesthetically pleasing and is a sign that
your pond/lake is healthy and balanced.
• Today many countries have turned to a natural wetland
system to filter their lake, waste water, sewerage and
others using chemicals, microbes, aeration and
coagulants.
• Wetland filter is a natural plant filtration to remove
nutrients in the water to prevent eutrophication
(Eutrophication is when excessive nutrients are flushed
into lakes/rivers and cause excessive algae growth)
LANDSCAPE APPROACH TO REMOVE
POLLUTANTS IN THE LAKES AND PONDS.
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SUB-SURFACE HORIZONTAL FLOW WETLAND FILTER
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SUB-SURFACE VERTICAL FLOW WETLAND FILTER
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SUB-SURFACE VERTICAL FLOW WETLAND FILTER
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CONSTRUCTED WETLAND (COMBINATION OF VERTICAL AND HORIZONTAL FLOW SUB SURFACE
WETLAND)
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Punggol Serangoon Reservoir, Singapore
CONSTRUCTED WETLAND FILTER IN SINGAPORE
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Constructed wetland in in Flintenbreite near Luebeck, Germany
CONSTRUCTED WETLAND FILTER IN GERMANY
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SUB-SURFACE VERTICAL FLOW CASCADE WETLAND
FILTER
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Constructed cascade wetland at an Industrial Park in Changshu,
China
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THAILAND
CONSTRUCTED WETLAND FILTER IN THAILAND
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.
CONSTRUCTED WETLAND FILTER IN AUSTRIA
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Constructed cascade wetland Park in China
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Lake Bala in North Wales
CONSTRUCTED WETLAND FILTER IN NORTH WALES
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BEFORE
AFTER
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BEFORE
AFTER
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ALTERNATVE ENERGY TO
CIRCULATE THE WATER THROUGH THE CONSTUCTED WETLAND
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Muddy due to bottom feeding fish activities stirring and digging the
lake bed
Large catfish at Tasik
Rekreasi Bukit Jalil
Patin
Keli/
Catfish
Baung/ Catfish
Tilapia
Belut/Eel
WHY OUR LAKE WATER IS NOT CLEAR
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Tasik Rekreasi Bukit Jalil
Catfish makes the lake muddy
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Controlling the numbers of nuisance fish that stir up the
sediment
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OTHER METHOD TO CLARIFY LAKE WATER
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Organic chemical treatment of the lake water so that all suspended matter settle
to the bottom
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Moringa seed powder
Gypsum
Limestone (calcium carbonate)
Organic chemical treatment of the lake water so that all suspended
matter settle to the bottom
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Aluminium Sulphate
Chemical treatment of the lake water so that all suspended matter settle to
the bottom
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7.0 DESIGN TO SOLVE OR
AVOID EROSION
INFLICTS BY STORM
WATER
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Osiers- Salix viminalis
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Stone pitching
Gabion wallPlanting
Planting
Prevent erosion of the lake bank
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Bacterial treatment using Effective Microorganisms (EM)
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MORE TURF AREA
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8.0ATTEMPTS BY MALAYSIAN LANDSCAPE ARCHITECTS
TO INCORPORATE SOLUTIONS TO STORM
WATER PROBLEMS
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CIK KHAIRINA KAMIL
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ON SITE WATER DETENTION
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SECTION
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SECTION
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