Half-Day Intensive Seminar Entitled: How to Design a Drainage System to Meet the Requirements of the Urban Stormwater Management

http://www.msmam.com 1

Half-Day Intensive Seminar Entitled: How to Design a Drainage System to Meet the Requirements of the Urban

Stormwater Management Manual (MSMA) by D.I.D.

Presenter: Ir. Dr. Quek Keng HongOrganised By: Water Resources Technical Division (WRTD) of IEM

Date: 13-4-2009 (Monday) Time: 9:00 am-1:00 pm


Timetable for the Seminar…

• Registration: 8:30 am- 9:00 am• Session 1: 9:00 am-10:45 am• Tea Break: 10:45 am-11:15 am• Session 2: 11:15 am-12:45 pm• Q & A: 12:45 noon- 1:00 pm


Topics to be Covered

• Part A- What is MSMA?• Part B- What’s new in MSMA?• Part C- How to master MSMA?• Part D- How to solve problems in MSMA?• Part E- Where to download free resources in

MSMA?


Introducing Myself…

• Ir. Dr. Quek Keng Hong

• Chairman of WRTD, IEM 2003/4/5

• Professional engineer, member IEM

• Consultancy for 20+ years

• Training 8 MSMA Workshops + Courses

• Principal of Dr. Quek & Associates


My Track Records: • Review of Bridges for Double Track from Rawang-

Ipoh- 2001. DRB-HICOM.• Review of Culverts for Double Track from Rawang-

Ipoh- 2001. DRB-HICOM.• Hydrological and Hydraulic Design Double Track

from Gemas-Kluang 2003/4. GAMUDA-MMC.• Hydrological and Hydraulic Design Double Track

from Kluang-JB- 2003/4. GAMUDA-MMC.• Many infrastructural projects around the country.• Expert witness for several court cases related to

flooding.


Seminar Guide:

• You can download Free MSMA Resources:

• eCourse at: http://ecourse.msmam.com

• Videos at: http://videos.msmam.com

• Software: http://software.msmam.com


The Right Approach

• How to master MSMA?

• Knowledge

• Tools


Knowledge

• What knowledge?

• Technical knowledge

• Software skill


Tools

• What tools?

• Manual

• Software

• Other References


Technical Knowledge

• What technical knowledge?

• Requirements

• Computation

• Design


Technical Knowledge


• Simplify the problem

• Break it down

• Solve individually

• Combined them


Design Storm

Calculate IDF data

Hydrograph Method

Time Area Method orRunoff Routing Method

Reservoir Routing

Level Pool Routing Through Detention Storage

Calculate Water Level(Workshop 2)

Use HEC-RAS model to calculate water level in drain

Qp

t

I

t

Detention Basin

Open Drain


Technical Knowledge


• Simplify the problem- models

• Break it down- 4 models

• Solve individually- 4 procedures

• Combined them- outflow hydrograph


Technical Knowledge

• Tip: You can refer to the relevant parts of the Manual


Conclusion

• You will reach your destination safely if you have the right skill and tool.


Tricks & Shortcuts

• Question: What is the most powerful tool you need to apply MSMA?


• Cheap

• Save time

• Automation

• Repetitive

• Accurate

• Reporting

Requirements


Spreadsheet


Why Spreadsheets?

• Spreadsheets are powerful!– Cheap- free– Save time- recycle– Automation- computation is automatic– Repetitive- iterative work– Accurate- less computation error– Reporting- graphs & tables


Why Spreadsheets?

• Good for repetitive calculation

• Good for presentation

• Can be applied from job to job

• Easy for checking & record

• Lifetime tool of an engineer


Spreadsheet vs Proprietary Software

• You understand what you do using spreadsheet (hand calc)

• You know how and where the parameters are used

• Debugging easier- you know what parameters to change


Conclusion:

• Spreadsheet will make work smarter and not harder.

• More importantly it will make you a better engineer.


Create your own physical library of tools, resources & software

• Create your own physical library of tools, resources & software recommended in MSMA

• Print out all manuals- bind them

• Read them.

• How I do it?


This is my Resources on MSMA:


Part of the physical libraryin my office:


Create your own digital library of tools, resources & software

• Create your own digital library of tools, resources & software recommended in MSMA

• Save into a PC/notebook computer

• Learn to apply them.

• How I do it?


PC- digital library:


Create spreadsheets for all MSMA computation

• Create spreadsheets for all MSMA computation

• Save them and use them for future jobs

• Refine them

• Improve them

• Keep it in your notebook PC

• They ARE your money-making tools!!!


Why Spreadsheets?

• Spreadsheets are powerful!


• Can plot graph easily

• Ideal for output to report


• Example: culverts spreadsheet


Examples of Spreadsheets:

• Design storm (IFD computation)

• Peak discharge computation (Rational Method, Time-Area Method)

• Reservoir routing (Level Pool Routing)

• Culvert design procedure (inlet & outlet control)

• Plus many more…(continue next page)


More Spreadsheets…

• HP1- IFD curves • HP4- Regional Flood Frequency Analysis

(rural)• HP 5- Rational Method (rural)• HP 11- Design Hydrograph Method (rural)• HP 16- Modified Rational Method.• Flood frequency analysis using Weibull• Reservoir routing program- (fortran)• And more …. (more added from time to time)


Download Software Recommended in MSMA

• Download software recommended in MSMA

• Install them

• Print out user manual >>> physical library

• Read them

• Go through worked example


Examples of Software Recommended in MSMA

• Many software- proprietary & public domain

• MUST HAVE software:– Hydrologic Modelling

• Runoff-Routing Computer Models (HEC-HMS)

– Hydraulic Modelling • HEC-RAS


Build Your Own Library of Tools

• MSMA recommends many free software & resources.

• Save $1,000 compared to commercial software.

• Download, install, print manual & learn to apply them.

• Your money-making tools!


Download Software Not Recommended in MSMA

• This is OPTIONAL!• Download software not recommended in

MSMA• Install them• Print out user manual >>> physical

library• Read them • Examples: some water quality model


Where to Find Good Software

• US Army Corps of Engineers- Hydrologic Engineer Center

• US EPA

• US Geological Survey

• Etc…


Conclusion:

• There are tonnes of free software, programs/spreadsheet that are available!


Part A- What is MSMA?

• What is the purpose of MSMA?

• What are major differences between MSMA & PDP1?

• Why the need for MSMA?


Tip 1- What is the purpose of MSMA?

• New urban drainage design procedures and guidelines for Malaysia…

• “Urban Stormwater Management Manual for Malaysia”

• “Manual Saliran Mesra Alam Malaysia” or MSMA

• Published by DID in 2000• Gazetted by the Federal Government in 2001


Tip 2- Major Differences Between MSMA & PDP1?

• MSMA• >1,100 pages• 20 volumes• 48 chapters• 2 three-inch arch

folders


Compared to the Old Procedure…

• PDP1- Planning and Design Procedure No. 1 published by D.I.D. in 1975.

• 242 pages• 10 chapters• ½ inch thick


Tip 3- Why MSMA?

• Why there is a need to introduce MSMA?


The Star- KL Hit By Floods!


KL- A Floating City?


LRT Becomes LBT?


The Only Free Parking Lot in KL


Part B- What’s new in MSMA?

• What are major changes in MSMA?

• Rapid Disposal Vs Control-at-Source

• Major & minor system concept

• Onsite Detention, Community and Regional Detention/Retention


Tip 4- Some Major Changes:

• Major changes in design approach & procedures

• Emphasis on water quantity and quality management in MSMA.

• More comprehensive coverage of subject matters

• Emphasis on computational methods• MSMA- SI units, PDP1- Imperial units


Tip 5- Rapid Disposal Vs Control-at-Source

• PDP1- Rapid Disposal

• MSMA- Control-at-Source


Old Approach- Rapid-Disposal Old Approach- Rapid-Disposal (Conveyance Oriented Approach)(Conveyance Oriented Approach)

W/o erosion and sediment control

Source of pollutionLarge and deep


New Approach- Control-at-source

Detention Pond Storage Tank Engineered Waterway

Sediment Fence Gross Pollutant Trap

Swale


Tip 6- Major & Minor Systems Design Concepts


Tip 7- Detention/Retention Storages Classification: OSD, Community & Regional


Tip 8- Concept for Multilevel Stormwater System


Tip 9- Examples of On-site Detention Facilities


Tip 10- Devices for Community & Regional Detentions

• Involves detention Storage

• Example: detention basins/ponds

• Attenuation of hydrograph

• Pre and post-development peak discharge

• Reduction in peak discharge because of detention control of runoff


Tip 11- Differences Between OSD & Community Detention:

• MSMA (Control-at-source):– On-site Stormwater Detention (OSD)- Minor

Storm (10 year ARI)– Community or regional detention- Minor &

Major Storms (20, 50, 100 year ARI)

Many water quantity control measures eg, retention, detention and infiltration.Aim: To limit the post-development peak outflow rate to that existed before developmentDesign ARI: Table 4.1.

Many water quantity control measures eg, retention, detention and infiltration.Aim: To limit the post-development peak outflow rate to that existed before developmentDesign ARI: Table 4.1.


More Differences…• On-site Stormwater Detention (OSD)-

individual housing/industrial lots.

• Community/Regional facilities- catchment consists of mixed landuse/different owners.


Part C- How to Master MSMA?

• How to learn MSMA?

• How to increase your productivity in applying MSMA?


Tip 12- How to Learn to Apply MSMA?

• Read the MSMA Manual

• Question: But where to start?

• Answer: Start from Page 1…


So You Started Reading MSMA…

• Assuming you started reading from Page 1.

• At Page 123, you’re bored.

• At Page 456, you’re confused.

• At Page 789, you finally give up!


Why Do You Fail?

• Too thick (>1,100 pages)! No time!

• Too complicated! Too much information!

• What is important?• What is not important?• You cannot relate

what you read to your work


Tip 13- The Correct Way of Learning MSMA…

• Understand what you need to know?

• Read only what you need to know.

• Do the worked examples.

• Repeat the above.Note:

1. Focal point- scatted information in MSMA, Eg detention basin design, reservoir routing, design ARI.

2. Allows you to relate what you read to your work & experience

3. Build upon what you already knew. You are not starting 100% new.

Note:

1. Focal point- scatted information in MSMA, Eg detention basin design, reservoir routing, design ARI.

2. Allows you to relate what you read to your work & experience

3. Build upon what you already knew. You are not starting 100% new.


So Why Do You Fail Again?

• No focal point- reading disorganised information from Page 1 to 1,100.

• Cannot relate to your work or what you already know.

• You are bored!

• That’s why you failed!


Tip 14- Secrets for Success…

• Understand what you need to know?

• Focus only on what you need to know.

• Do the worked examples.

• Repeat the above.


Tip 15- So You Want Some Tips?

• Use Examples (Design Storm, Rational Method, Hydrograph Method, Reservoir Routing etc) as a starting point.

• Read the relevant chapters in MSMA.

• Go through the Worked Examples.


Tip 16- Create your own physical library of tools, resources & software

• Create your own physical library of tools, resources & software recommended in MSMA

• Print out all manuals- bind them

• Read them.

• How I do it?


This is my Resources on MSMA:


Part of the physical libraryin my office:


Tip 17- Create your own digital library of tools, resources & software

• Create your own digital library of tools, resources & software recommended in MSMA

• Save into a PC/notebook computer

• Learn to apply them.

• How I do it?


PC- digital library:


Tip 18- Create spreadsheets for all MSMA computation

• Create spreadsheets for all MSMA computation

• Save them and use them for future jobs

• Refine them

• Improve them

• Keep it in your notebook PC

• They ARE your money-making tools!!!


Why Spreadsheets?

• Spreadsheets are powerful!


• Can plot graph easily

• Ideal for output to report


• Example: culverts spreadsheet


Tip 19- Examples of Spreadsheets:











Tip 20- Download Software Recommended in MSMA

• Download software recommended in MSMA

• Install them

• Print out user manual >>> physical library

• Read them

• Go through worked example


Tip 21- Examples of Software Recommended in MSMA

• Many software- proprietary & public domain

• MUST HAVE software:– Hydrologic Modelling


– Hydraulic Modelling • HEC-RAS


Tip 22- Build Your Own Library of Tools

• MSMA recommends many free software & resources.

• Save $1,000 compared to commercial software.

• Download, install, print manual & learn to apply them.

• Your money-making tools!


Tip 23- Download Software Not Recommended in MSMA

• This is OPTIONAL!• Download software not recommended in

MSMA• Install them• Print out user manual >>> physical

library• Read them • Examples: some water quality model


Tip 24- Where to Find Good Software

• US Army Corps of Engineers- Hydrologic Engineer Center

• US EPA

• US Geological Survey

• Etc…


Part D- How to solve problems in MSMA?

• Question: What is the most powerful tool you need to apply MSMAM?


• Cheap

• Save time

• Automation

• Repetitive

• Accurate

• Reporting

Qualities of the Tool


Spreadsheet


Why Spreadsheets?

• Spreadsheets are powerful!– Cheap- free– Save time- recycle– Automation- computation is automatic– Repetitive- iterative work– Accurate- less computation error– Reporting- graphs & tables


Why Spreadsheets?


• Good for presentation


• Easy for checking & record

• Lifetime tool of an engineer


Spreadsheet vs Proprietary Software

• You understand what you do using spreadsheet (hand calc)

• You know how and where the parameters are used

• Debugging easier- you know what parameters to change


Tip 25- Examples of Computational Procedure

1. Computation of design storm2. Computation of peak discharge3. Reservoir routing4. Design of detention basin5. Design of sediment basin6. Culvert design procedure7. Hydrologic modelling8. Hydraulic modelling


Tip 26- Example 1: Computation of Design Storms

• MSMA uses a set of polynomial equations for 35 major urban centres in Malaysia.

• PDP1 uses:– IFD curves derived for 11 cities in P. Malaysia– HP1 uses a set of ½, 2 & 24 hour isopleths of 2

and 20 year A.R.I. for Malaysia.

Note:

MSMA data up to 2000, PDP1 data up to 1982

Note:

MSMA data up to 2000, PDP1 data up to 1982


Tip 27- Example 2: Computation of Peak Discharge

• MSMA uses:– For area < 0.8 km2, Rational Method.– For area > 0.8 km2,

• Time-Area Method

• Runoff-Routing Computer Models

• PDP1 uses:– Modified Rational Method

Note:

0.8 km2= 80 ha= 198 acres

HEC-HMS, RORB, RAFTS, SWMM

Note:

0.8 km2= 80 ha= 198 acres

HEC-HMS, RORB, RAFTS, SWMM


Tip 28- Other D.I.D. Procedures…

• Summary of empirical methods: – HP5 (DID, 1989)- Rational Method– HP11 (DID, 1980)- Design Hydrograph Method– PDP1 (DID, 1975) & (HP16, 1976)- Modified

Rational Method– HP4 (1987) Regional Flood Frequency Analysis– MSMA (DID, 2000)

• All these are still valid (except PDP1)• Can be used instead of MSMA.


Range of Validity:

Tea Break

Be Back at 11:00 am

Tea Break

Be Back at 11:00 am


Tip 29- Example 3: Reservoir Routing

• MSMA uses level-pool routing method.

• PDP1 uses a graphical procedure to determine the maximum differential storage based on the cumulative inflow and outflow.

Note:

MSMA more accurate

PDP1 approximate

Note:

MSMA more accurate

PDP1 approximate


Tip 30- Example 4: Design of Detention Basin

• MSMA uses:– Hydrograph method for inflow– Level-pool routing through basin– Can route inflow hydrograph through basin to get outflow

hydrograph

• PDP1 uses:– Modified Rational Method for inflow– Graphical method of determining storage– Cannot route hydrograph through basin

• MSMA states that Post-Development Peak = Pre-Development Peak for major & minor storms

Note:

MSMA computes outflow hydrograph from detention basin

Note:

MSMA computes outflow hydrograph from detention basin


Tip 31- Example 5: Design of Sediment Basin

• MSMA uses:– 3 or 6 month A.R.I for design storm < or > 2 yr– Wet/dry sediment basin– Storage volume related to storm charateristics

(Time of concentration and storm depth)

• PDP1 uses:– empirical formula to determine storage volume

Note:

MSMA- more rational

PDP1- more empirical

Note:

MSMA- more rational

PDP1- more empirical


Tip 32- Example 6: Culvert Design Procedure

• MSMA uses: – SI units– Different nomographs– More entrance loss coefficients (outlet control)

• PDP1 uses:– Imperial units– Different nomographs– Less entrance loss coefficients

Note:

MSMA culvert formula wrong!

Eqn 27.4, 27.5

Note:

MSMA culvert formula wrong!

Eqn 27.4, 27.5


Tip 33- Example 7: Hydrologic Modelling

• MSMA: – Hydrologic Modelling


PDP1: – Not specified (1975)

HEC: Excellent free public domain software.

HEC: Excellent free public domain software.


HEC-HMS Theory:• Hydrological software: HEC-HMS 2.1.1

– Compute discharge peak & hydrograph for design (urban & rural catchment any size)

• Separate submodels to represent different components of the rainfall and runoff process:– Models of runoff volume (Loss Models)

– Models of direct runoff (Transform Models)

– Models of baseflow (Baseflow Models)

– Models of channel flow (Routing Models)


HEC-HMS Representation of the Runoff Process:

Important:

Chose the submodels carefully.

Not all valid in Malaysia.

Submodel must be rational.

Important:

Chose the submodels carefully.

Not all valid in Malaysia.

Submodel must be rational.


Schematic Layout of HEC-HMS Model :


HEC-HMS Application:• HEC-HMS• Input:

– Topographic map– Rainfall hyetograph– Streamflow hydrograph

• Output:– Discharge hydrographs

• Quick worked example follows…


Tip 34- Example 8: Hydraulic Computation

• MSMA: – Recommends the use of HEC-RAS

– Steady state one dimensional open channel hydraulics.

• PDP1: – Unclear on this

– Backwater profile computation using standard step method considered too difficult

– Manning Formula

Note:

HEC-RAS: Solution of energy equation.

Excellent free public domain software.

Note:

HEC-RAS: Solution of energy equation.

Excellent free public domain software.


Tip 35- Hydraulic Modelling:

• Hydraulic software: HEC-RAS 3.1– Compute backwater surface profile, simulate

culverts, drains, weirs & overbank flow.– By solving the energy equation with an

iterative procedure called the standard step method.

• PDP1- Backwater profile computation using standard step method considered too difficult, use Manning Formula


Representation of Terms in Energy Equation:


HEC-RAS Application:• HEC-RAS• Input:

– Channel cross sectional data– Roughness– Inflow

• Output:– Water level

• Quick worked example follows…


Tip 36- Where to Get Them For Free?

• High quality software by US Army Corps of Engineers

• Powerful, user friendly.

• FREE

• Download, print manual, learn to use them

• Your tools- put in your library collection


Part E- Where to download free resources?

• You can download Free MSMA Resources:

• eCourse at: http://ecourse.msmam.com

• Videos at: http://videos.msmam.com

• Software: http://software.msmam.com


Tip 37- FREE e-Course… • Free eCourse for all participants of

this seminar.

• It covers all the topics discussed today.

• Simply fill in the pop-up request form at:http://MSMAM.com


Tip 38- Free Demo Spreadsheets:

• Simply fill-up the request form to download FREE demo spreadsheets discussed during this Seminar at:

http://msmam.com

See live demo!


Examples of Spreadsheets:











Topics Covered- Recap• Part A- What is MSMA?

• Part B- What’s new in MSMA?

• Part C- How to master MSMA?

• Part D- How to solve problems in MSMA?

• Part E- Where to download free resources in MSMA?


Announcing June 2009 Workshop • How to Successfully Design a Drainage System

for Compliance with the New Urban Stormwater Management Manual by D.I.D.

• Workshop No. 1- Introductory Concepts, design criteria & procedure

• Workshop No. 2- How to design drainage system using free software

• Workshop No. 3- How to design detention/sediment basin & culverts

• Workshop No. 4- Erosion and Sediment Control Plan (ESCP) and On-Site Detention (OSD)


Contact Details:

Any queries?

You are welcome to contact me.

Details of email & phone number at:

http://www.msmam.com

Thank you!Thank you!


Some Errata in MSMA:

• Peak discharge computation – Rational Method Eqn 14.1 – Time-Area Method Work Example App 14.B.2

• Reservoir routing – Level Pool Routing- Work Example App 20.B

• Culvert design procedure – inlet & outlet control- Eqn 27.4 & 27.5

• Appendix 39.A


And I Wish You…

GOOD LUCK!

Documents

Half-Day Intensive Seminar Entitled: How to Design a Drainage System to Meet the Requirements of the Urban Stormwater Management