for Malaysia - IGES...INTRODUCTION Flood •Major problem in Malaysia Landuse For Urbanization...
Transcript of for Malaysia - IGES...INTRODUCTION Flood •Major problem in Malaysia Landuse For Urbanization...
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Urban Stormwater Management Manual
for Malaysia(Manual Saliran Mesra Alam)
By :Ir. AZMI BIN AMAT
Stormwater Management DivisionDrainage and Irrigation Department of Malaysia
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Introduction1
ISSUES2
PAST DRAINAGE PRACTICE3
CONCLUSION 5
OUTLINE
WHY WE NEEDS STORMWATER MANAGEMENT4
URBAN STORMWATER MANAGEMENT MANUAL5
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INTRODUCTION
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❑ Malaysian economy has gone through rapid structural change since 1957.
❑ Urban growth is dynamic in accordance with the rapid economic growth and
industrialization.
❑ This will change the hydrologic cycle and influence on the runoff pattern.
❑ In 1971, Malaysia suffered serious damage over the whole country due to the
flood.
❑ Government gave the Department of Irrigation and drainage (DID) the task of
planning Implementation of Urban Drainage work as part of overall flood mitigation
programs.
INTRODUCTION
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Flood
• Major problem in Malaysia
Landuse For Urbanization
• Forest to agriculture
• Agriculture to urban areas
Increase Flood prone areas• 29,800 sq.km
(about the size of Selangor + Perak)
ISSUES - FLOOD
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TYPES OF FLOOD
Major Flooding the main river overtop and cause widespread flooding of long duration
Flash Flood a short duration flood that is very localized
• Flood condition varies from state to state. • Flood level varies from 0.2m up to 5m(extreme cases). • Size of flood <100 ha. to a few thousand ha.
TYPES OF FLOOD
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• Usually occur in urban areas
• Caused by short, intense, localized thunderstorms that occurs < 3 hours
– Flood water rise almost immediately during the storm and water will recede within 6 hours after the rain
FLASH FLOOD DEFINITION
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▪ Short, intense localised thunderstorms, the type of storm usually
experienced in the evening
▪ Rapid and Uncontrolled Development in catchment areas resulting in Heavy
Siltation
▪ Obstructions in River Flow System that Reduce in River Flow Capacity
▪ Limited available space for River Improvement works to handle the ever
increasing flood flow due to escalating urbanisation process
▪ Insufficient internal drainage systems within the town area → undercapacity
CAUSES OF FLOODING
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PAST DRAINAGE PRACTICE
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PAST DRAINAGE PRACTICE
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CONVEYANCE ORIENTED – HARD STRUCTURE
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Widening of The River Channel
CONVEYANCE ORIENTED – WIDENING RIVER
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Widening and deepening at the town city center is not
applicable due to land accusation too high.
CONVEYANCE ORIENTED – LAND PROBLEM
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Allocation for Flood Mitigation Programmed
CONVEYANCE ORIENTED – HIGH COST
ALLOCATION FOR FLOOD MITIGATION PROJECTS
5 YEARS MALAYSIAN PLAN
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WHY WE NEEDS STORMWATER MANAGEMENT
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WHY WE NEEDS STORMWATER MANAGEMENT
• a) Urbanisation – Land use Change
• b) Flash Flood locations the whole nations Increasing
• c) Government allocation to mitigate flood increase
• d) Water Pollution
• e) Water Scarcity
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Jalan Bukit Bintang, 1950
Jalan Bukit Bintang, 2017
Ampang Park, 1970
Ampang Park, 2017
URBANIZATION – LANDUSE CHANGE
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CHANGES IN HYDROLOGY AND RUNOFF DUE TO DEVELOPMENT
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IMPACT OF UNCONTROLLED DEVELOPMENT
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Flow
Time
Flow Characteristics
Rural and Urbanised Catchment
UrbanisedDeveloped
RuralUndeveloped
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URBAN STORMWATER MANAGEMENT MANUAL for MALAYSIA
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DID MANUAL
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OBJECTIVE STORM WATER MANAGEMENT IN MALAYSIA
• Ensure the safety of the public
•Control nuisance flooding and provide the safe passage
of less frequent and larger flood events
• Stabilize the land form and control erosion
•Optimize the land available for urban development
• Minimize the environmental impact of urban runoff on
water quality
• Enhance the Urban Landscape
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K Quantity Control
Quality Control
Erosion and Sediment Control
Operation and Maintenance
Esthetical Value
1
2
3
4
5
MSMA COMPONENT
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Stormwater QuantityControl
Erosion and SedimentControl
Stormwater QualityControl
Mud Flood Polluted RiversFlash Flood
1 2
3 PHASES
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Conveyance Storage Oriented Oriented
• conveyance systems must be sizedfor the total increase in flowsresulting from urbanisation
• downstream conveyance systemsoften have insufficient capacity
• traditional hard lined openconveyance systems can be a hazardto the public during and after raindue to high flow velocities
• urban pollutants are transported todownstream areas
• In addition to the traditionalconveyance-oriented approach,a potentially effective andpreferable approach tostormwater management is thestorage-oriented approach
• The principal elements andtechniques used in a storage-oriented system are stormwaterdetention facilities andretention facilities.
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QUANTITY CONTROL – New Concepts
Storage
Conveyance Facilities
Peak Discharge
Control
• Onsite Detention (OSD)• Detention Pond
- dry pond- Wet pond
• Surface flow• Property Drainage• Pavement drainage• Open Drain / Swale• Pipe drain• Engineered / Bio-
engineered Waterways
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On-site
Regional
Community30
QUANTITY CONTROL –Control At Source
“control at source” METHODIN THE NEW DEVELOPMENTWILL PROVIDE THE COUNTRYAS ZERO (FLASH) FLOODCOUNTRY IN THE NEARFUTURE (preventive)
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Time
Discharg
e
Post DevelopmentUncontrolled Runoff
Pre-DevelopmentUncontrolled Runoff
Post-DevelopmentControlled Runoff byDetention
Q post development ≤ Q pre-development“
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Storage - OSD
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Storage - Pond
Detention PondDry Pond
Recommended : Dry Pond 5-0 haRecommended : Wet Pond > 10 ha
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Storage - Pond
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SECTION
PERSPECTIVE
GrateWalkway
Pavement
Access Cover
Walkway
Pavement
GrateWalkway
Pavement
a) Grate b) Curb Opening c) Combination
CurbCurb Curb
GrateCurb
Opening
Grate
Gulter
Opening
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Conveyance Facilities :Drains and Swales
(a) Uncovered Open Drain (b) Covered Open Drain
0.5 m minimum1.2 m maximum
Varies
0.6
m m
inim
um
1.2
m m
axim
um
Var
ies
Grate orsolid cover
Varies0.5 m minimum1.2 m maximum
0.6
m
max
imu
m
Lined Drains
(b) Drainage Modular
2%
500
Closed Turfing
12
2%
500
12
Swale
41
(a) Underground Pipeline
Varie
s(M
in. 2m
)
11
11
1 : 301 : 301 : 50 1 : 50
41
F.G.L
500 500Swale
Top Soil
Clean River Sand Suround
2 Nos Single Module Enclosedin Geotextile
Top Soil
Full Removal of UnsuitableMaterial Minimum 2m Depthfrom Culvert Invert LevelLand Replacement with Sand Fill
Closed Turfing
Backfilled withApproved Material
F.G.LF.G.L F.G.L
Composite Swale
(b) Drainage Modular
2%
500
Closed Turfing
12
2%
500
12
Swale
41
(a) Underground Pipeline
Vari
es
(Min
. 2m
)
11
11
1 : 301 : 301 : 50 1 : 50
41
F.G.L
500 500Swale
Top Soil
Clean River Sand Suround
2 Nos Single Module Enclosedin Geotextile
Top Soil
Full Removal of UnsuitableMaterial Minimum 2m Depthfrom Culvert Invert LevelLand Replacement with Sand Fill
Closed Turfing
Backfilled withApproved Material
F.G.LF.G.L F.G.L
Remain
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Conveyance Facilities: Engineered Waterways
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Wetpond
Grassed ChannelEngineered Channel
Conveyance Facilities: Engineered Waterways
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TRM Technique Sand Filled Mattress Reinforced Grass
Gabion Mattress Reinforced Grass
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BIOENGINEERED CHANNEL
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QUALITY CONTROL
Temporary BMPs
ESCP
Sediment Control
• Sediment Basin
• Sediment Trap
Permanent BMPs
Treatment Measures
• Infiltration
• Bioretention System
• Swales
• GPT
• Water quality ponds/Wetlands
Treatment Trains
For Water Pollution
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What it is ESCP ?An ESCP is a plan that details temporary
measures that will be implemented during the construction phase
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Submission ESCP
• The Erosion Sedimentation Control Plan (ESCP) shallbe submitted for project area more than 1 ha.
• The plans must be prepared based on constructionactivities staging which covers land grading &earthworks (pre-bulk grading plan) and constructionstage (post-bulk grading plan).
• For project area less than 1 ha, the developer shallsubmitted Best Management Practices Plan tocontrol soil erosion and siltation onsite.
• The plan must prepared by PE and CPESC holder
• And the consultant responsible to make sure all theBMPs constructed and well maintained.
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ESCP
• Temporary BMPs Facilities• To minimize erosion and sail delivery away from
construction site.• No land clearing shall be allowed for the
construction site before the installation of sediment control facilities onsite
Erosion and Sediment Control Principles
DID, 2010GUIDELIONES FOR
EROSION AND SEDIMENT CONTROL IN MLAYSIA
GENERAL PRINCIPLES FOR ESCP
Minimizing Soil
ErosionPreserving Top Soil &
Other Assets
Access Routes &
Site Managem
ent
Drainage Control &
Runoff Manageme
nt
Earthwork & Erosion
Control
Sediment Preventi
on & Control
Slope Stabilizati
on
Site Maintena
nce
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Sediment Control
QUALITY CONTROL : Temporary BMPs
Silt Fence Silt Pond
Check Dam
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Type Group Description and Function Catchment Area Range
Purpose-built or Proprietary
GPT Type 1 Floating Debris Traps (booms)
Litter capture on permanent waterbodies
> 200 ha Proprietary and purposebuilt (on-line installation)
Trash Racks & Litter Control Devices
Hard or soft litter capture devices on drains
2 – 400 ha usually purpose built from modular components (on-
line installation)
GPT Type 2 Sediment Basin and Trash Rack Traps (SBTR)
Sediment and litter capture for drains or pipes
5 – 2000 ha Proprietary and purposebuilt (on-line or off-line
installation)
GPT Type 3 Litter Control, Sediment Basin, Oil and Grease Trap
Litter, sediment and oil and grease, capture for drains or pipes
2 – 40 ha Proprietary (on-line installation)
1 2 3
QUALITY CONTROL : Permanent BMPs
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Infiltration Trench
QUALITY CONTROL : Permanent BMPs
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QUALITY CONTROL : Permanent BMPs
BIORENTATION
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Water Quality Pond / Constructed Wetlands
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CONSTRUCTED - WETLAND
UPPER NORTH 6
UPPER NORTH 7
UPPER NORTH 5
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PutrajayaDam
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The outflow of PutrajayaLake into Sungai Langat
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• Stormwater Management Manual for Malaysia (MSMA)
is a solution to flood, water resources and river
pollution to Malaysia as a long term measure
• Reduced government expenditure on flood mitigation
project
• As a basic of the development of “town in the garden
concept” to become livable cities.
Conclusion
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http://www.water.gov.my
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Download
MSMA 2nd Edition
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THANKS YOU terima kasih
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Rainwater detention & Vertical Green at
Display Center
• SP Setia is one of the few developers conversant with Green Roof and
Vertical Green Technology (Greenery on the walls of
buildings).
• .
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•Pond and infiltration Trench
Desa Park City, Kuala Lumpur
CONTOH PERLAKSANAAN MSMA
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• CONTOH PERLAKSANAAN MSMA
•Structural Measure
Senawang, Negeri Sembilan
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• Pemilihan kolam sebagaikawalan kuantiti dan pada
masa yang sama bolehdijadikan alternatif kepada
sumber air
•Kolam Takungan
CONTOH PERLAKSANAAN MSMA
SLIDE NO. 11
Kolam Metropolitan Kuala Lumpur