TECHNICAL TALK ON
nd
MSMA 2 EDITION
USING MES SOFTWARE
DATE : 19 NOVEMBER 2012
TIME : 9:00AM – 6:00PM
VENUE : SUMMIT HOTEL, USJ
MAIN SPEAKERS:
1) Jabatan Kerja Raya (JKR)
- Ir. Shahrizam b. Mat Salleh
2) Jabatan Pengairan dan Saliran (JPS) Selangor
- Ir. Salmah
3) River Engineering and Urban Drainage Research
Centre (REDAC), Universiti Sains Malaysia
- Prof. Nor Azazi Zakaria
- Engr. Chang Chun Kiat
- Engr. Leow Cheng Siang
4) MES Innovation Sdn Bhd
- Mr. Brian Ewe
TOPICS COVERED:
1) JKR Technical Talk & MES-GeoF Introduction
2) MSMA History and Background
3) Overview of MSMA 2nd Edition
4) BIOECOD System: Sport Field Design & MES-BioFD
Introduction
5) OSD Design Based on MSMA 2
6) MiTS Demonstration
7) Detention Pond Design Based on MSMA 2
AN OVERVIEW OF
nd
MSMA 2 EDITION
MSMA 1st EDITION MSMA 2nd EDITION
20 Volumes, 48 Chapters 1 Volume, 20 Chapters
Concept based on Revised to suit local
overseas technology climate and technology
BMPs based on BMPs based on
overseas example local practices
Control at source, enhance
Control at source approach
water quality, more practical
No importance on Stresses on
Operation & Maintenance Operation & Maintenance
5 COMPONENTS OF MSMA:
1) QUANTITY – OSD, SPAH, Dry Pond, Wet Pond
2) QUALITY – Infiltration, bioretention, GPT,
wetland
3) ESCP – Check dam, sediment basin, silt fence
4) OPERATION & MAINTENANCE
5) AESTHETICAL VALUE
CHAPTER 1: Design and Acceptance Criteria
MSMA
(2000)
MSMA
(2012)
CHAPTER 1: Design and Acceptance Criteria
Sediment basins shall be sized in accordance with Chapter 39 MSMA
to retain a minimum of 70% of coarse sediments greater than
or equal to 0.04mm for all storms up to and including: (2000)
● 3 month ARI for construction projects that will take 2 years or
less to complete
● 6 month ARI for construction projects that will take longer
than 2 years to complete MSMA
(2012)
Temporary BMPs – ESCP
Permanent BMPs – Infiltration facilities, bioretention system, GPT, water quality pond & wetland, drain &
swales
CHAPTER 2: Quantity Design Fundamentals
Rainfall Design
MSMA
(2000)
ln(RIt) = a + b ln(t) + c(ln(t))2 + d(ln(t))3
MSMA
(2012)
CHAPTER 2: Quantity Design Fundamentals
Runoff Coefficient
MSMA MSMA
(2000) (2012)
CHAPTER 2: Quantity Design Fundamentals
Design Rainfall – Temporal Pattern
Table 13.4 Standard Durations for Urban Stormwater Drainage
MSMA
Standard Duration Number of Time Time Interval (2000)
(minutes) Intervals (minutes)
10 2 5
15 3 5
30 6 5
60 12 5
120 8 15
MSMA
180 6 30
(2012)
360 6 60
CHAPTER 2: Quantity Design Fundamentals
Design Rainfall – Temporal Pattern
Region 1: Terengganu and Kelantan Normalised Design
Region 2: Johor, Negeri Sembilan, Melaka, Selangor and Pahang Rainfall Temporal
Region 3: Perak, Kedah, Pulau Pinang and Perlis Pattern
Region 4: Mountainous Area
Region 5: Urban Area (Kuala Lumpur)
CHAPTER 3: Quality Design Fundamentals
Water Quality Volume (WQV)
CHAPTER 4: Roof and Property Drainage
- Gutters
- Downpipes
- Drains
- Pipes
- Swales
- Storage & Treatment facilities
CHAPTER 5: On-Site Detention
MSMA
(2000)
MSMA
(2012)
CHAPTER 6: Rainwater Harvesting (NEW CHAPTER!)
CHAPTER 7: Detention Pond
CHAPTER 8: Infiltration Facilities
CHAPTER 9: Bio-Retention
CHAPTER 10: Gross Pollutant Traps
CHAPTER 11: Water Quality Ponds and Wetlands
CHAPTER 12: Erosion and Sediment Control
STRUCTURE MSMA (2000) MSMA (2012)
Soil Loss Assessment No assessment ●Soil Loss (USLE) & Sediment
specified Yield (MUSLE) estimation
introduced.
●Complete with local derived
parameters.
●Calculation example provided
Design of BMPs ●Conceptual ●Revised: specific & practical
●Concentrate on silt trap ●Impractical BMPs excluded
and sediment basin ●Criteria specified in clear table
only forms.
Preparation of ESCP ●Conceptual ●Spell out requirements
●Example incomplete ●List the content of ESCP
●Example: from site assessment to
plan development
CHAPTER 12: Erosion and Sediment Control
CHAPTER 13: Pavement Drainage
CHAPTER 14: Drains and Swale
CHAPTER 15: Pipe Drains
CHAPTER 16: Engineered Channel
CHAPTER 17: Bio-Engineered Channel
CHAPTER 18: Culverts
CHAPTER 19: Gate and Pump Drainage
CHAPTER 20: Hydraulic Structures
OSD DESIGN
BASED ON MSMA 2
DESIGN PROCEDURE:
Instead of the computations specified in MSMA (2000), the simplified
procedure only involves the following 5 tables/ figures:
1) Figure 5.A1: Five (5) design regions
2) Table 5.A1: Max PSD & Min SSR value in accordance to the 5 regions
in Peninsular Malaysia
3) Table 5.A2: Max PSD, Min SSR and inlet values in accordance to
major towns in Peninsular Malaysia
4) Table 5.A3: OSD volume, inlet size and outlet size for 5 regions in
Peninsular Malaysia
5) Table 5.A4: Discharge – pipe diameter
Note:
If project site is not listed in Table 5.A2, skip Step (3) and Step (5)
DETENTION POND
DESIGN BASED
ON MSMA 2
SYSTEM COMPONENTS:
1) INLET ZONE
– inlet structure, GPT, sediment forebay, water quality pond
or wetlands, maintenance ramp and rock weir
2) STORAGE ZONE
– low flow channel/drain, maintenance ramp, pond body and
recreational facilities
3) OUTLET ZONE
– primary outlet, secondary outlet, embankment, outfall/
energy dissipater
SYSTEM CONFIGURATION:
SYSTEM CONFIGURATION:
● Remove finer soil particles
● Size 1/3 of wetland volume
● L:W ratio 2:1
●Trap pollutants
● 30% of detention
pond volume
● Remove debris &
coarse sediments
● Some also provide
for oil separation
WATER QUALITY CONTROL REQUIREMENT:
Detention ponds shall have pre-treatment facilities i.e.
BMPs to ensure they are not polluted and their water
quality levels meet regulatory standards.
The facilities shall include the followings:
- GPTs/ trash rack and sediment forebay
- Water quality pond or wetlands
- Other types of BMPs as needed to reduce pond's
contamination
Water quality control structures (BMPs) shall be designed
and constructed based on 40mm runoff depth
Design of the facilities shall be carried out based on
procedures presented in Chapter 10 and 11.
WATER QUANTITY DESIGN CRITERIA:
CHANGES MADE IN RELATION TO MSMA 2000:
Submission Checklist (DID, 2008):
The post-development outflow (2,50 and 100-yr ARI) from
the pond shall be designed to reduce the design flow
discharges below the pre-development flow (2-yr ARI) from
the catchment.
Primary outlets for detention basins shall be designed to
reduce post-development peak flows from the pond below
the pre-development peak flows for design storm of 2-yr
ARI.
MSMA 2nd Edition:
Post development peak flow of any ARI at the project outlet
must be less than or equal to the pre-development peak
flow of the corresponding ARI (Qpost ≤ Qpre)
WORK EXAMPLE
(OSD DESIGN)
