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1 EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON FLOOD HAZARD MAPPING 8 Feb 2007 EAST AND SOUTHEAST ASIA EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON FLOOD REGIONAL SEMINAR ON FLOOD HAZARD MAPPING HAZARD MAPPING JOHOR : ‘The Sinking State?’ Case study : District of Muar and Batu Pahat, Introduction of FHM BY Hazalizah binti Hamzah and Hj. Ariffin bin Mahamud Department of Irrigation and Drainage Malaysia 8 February 2007

EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON ......14 EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON FLOOD HAZARD MAPPING 8 Feb 2007 No. of Casualties : 16 people No. of Evacuees : 104,023

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Page 1: EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON ......14 EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON FLOOD HAZARD MAPPING 8 Feb 2007 No. of Casualties : 16 people No. of Evacuees : 104,023

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8 Feb 2007

EAST AND SOUTHEAST ASIA EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON FLOOD REGIONAL SEMINAR ON FLOOD

HAZARD MAPPINGHAZARD MAPPING

JOHOR : ‘The Sinking State?’Case study : District of Muar and Batu Pahat,

Introduction of FHM

BY

Hazalizah binti Hamzah and Hj. Ariffin bin MahamudDepartment of Irrigation and Drainage Malaysia

8 February 2007

Page 2: EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON ......14 EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON FLOOD HAZARD MAPPING 8 Feb 2007 No. of Casualties : 16 people No. of Evacuees : 104,023

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8 Feb 2007

Introduction- Flood Management In Malaysia- Overview of flood events in Johor from December

2006 until January 2007Flood Hazard Map In Malaysia- Case study : FHM for state of Johor

i. District of Muar, Johorii. District of Batu Pahat, Johor

Objectives of Producing Flood Hazard Map In MalaysiaProduction of Flood Hazard Map in MalaysiaProblems and Possible SolutionsConclusionAcknowledgement

Table of Contents

Page 3: EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON ......14 EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON FLOOD HAZARD MAPPING 8 Feb 2007 No. of Casualties : 16 people No. of Evacuees : 104,023

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8 Feb 2007

Flood Management In MalaysiaFlood Management In Malaysia

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8 Feb 2007

STRUCTURE OF THE OF THE NATIONAL DISASTER MANAGEMENT ORGANISATION

FederalFederal

Central Committee of National Disaster and Relief (CCDNR) Central Committee of National Disaster and Relief (CCDNR)

StateState

State Disaster and Relief Committee (SDRC)State Disaster and Relief Committee (SDRC)

DistrictDistrict

District Disaster and Relief Committee (DDRC)District Disaster and Relief Committee (DDRC)

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8 Feb 2007

STRUCTURE OF THE NATIONAL DISASTER MANAGEMENT ORGANISATION

• National Disaster and Relief Committee (NDARC)– Federal Level

• State Disaster and Relief Committee (SDARC) – State level

• District Disaster and Relief Committee (DDARC) – District Level

Page 6: EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON ......14 EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON FLOOD HAZARD MAPPING 8 Feb 2007 No. of Casualties : 16 people No. of Evacuees : 104,023

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NATIONAL DISASTER AND RELIEF COMMITTEE (NDARC)

CHAIRMAN

DEPUTY PRIME MINISTER

SECRETARY

DIRECTOR OF DISASTER ANDCRISIS MANAGEMENT UNIT,DEPARTMENT OF SECURITY

MEMBERS OF THE COMMITTEE

- SECRETARY GENERAL - INSPECTOR GENERAL OF POLICE - ARMY- FINANCE MINISTER- NATIONAL UNITY AND SOCIAL DEVELOPMENT MINISTER

- RELEVANT GOVERNMENT AGENCIES e.g. DID , MMS etc.

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8 Feb 2007

STATE DISASTER AND RELIEF COMMITTEE (SDARC)

CHAIRMAN

STATE GOV. SECRETARY

SECRETARY

DIRECTOR OF STATESECURITY DEPARTMENT

MEMBERS OF THE COMMITTEE

- POLICE- ARMY- STATE PUBLIC DEFENSE DEPARTMENT- RELEVANT GOVERNMENT AGENCIES e.g.DID, MMS etc.

Page 8: EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON ......14 EAST AND SOUTHEAST ASIA REGIONAL SEMINAR ON FLOOD HAZARD MAPPING 8 Feb 2007 No. of Casualties : 16 people No. of Evacuees : 104,023

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8 Feb 2007

DISTRICT DISASTER AND RELIEF COMMITTEE (DDARC)

CHAIRMAN

DISTRICT OFFICER

SECRETARY

DEPUTY DIRECTOR OFSTATE SECURITY

DEPARTMENT

MEMBERS OF THE COMMITTEE

- POLICE- ARMY- DISTRICT PUBLIC WORKS DEPARTMENT- RELEVANT GOVERNMENT AGENCIES e.g. DID, MMS, etc.

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8 Feb 2007

Overview of flood events in December 2006 until January 2007

Overview of flood events in December 2006 until January 2007

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8 Feb 2007

Flood event

on 19-31 December 2006

(1st wave)

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EXTENT OF FLOOD AREAS

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8 Feb 2007

24/12/2006

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8 Feb 2007

27/12/2006

25/12/2006

25/12/2006

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No. of Casualties : 16 people

No. of Evacuees : 104,023 people

Flood Impact

i) Johor Bahru 48 2,373 11,724 0

ii) Kota Tinggi 35 1,161 5,227 2

iii) Kluang 70 3,147 13,828 3

iv) Muar 126 6,432 30,441 3

v) Batu Pahat 116 5,948 27,971 5

vi) Pontian 32 710 3,286 0

vii) Segamat 72 2,442 10,286 3

viii) Mersing 9 277 1,260 0

Total 508 22,490 104,023 16

1 Johor

No. of Evacuees

Total Family Involved

Evacuees

CasualtiesNo. of EvacuationCenters

DistrictNo State

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8 Feb 2007

Flood Hit Again!

on 11 until 31 January 2007

(2nd wave)

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No. of Evacuees : 109,259 people (15 January 2007)Flood Impact

109,259Total

8,239Mersing84,669Pontian7

13,186Kota Tinggi6

6,593Segamat5

38,520Batu Pahat4

16,024Kluang3

5,611Muar2

16,417Johor Bharu1

Highest(15 January 2007)

No. of Evacuess(people)

DistrictNo.

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8 Feb 2007

CAUSES OF FLOODING

Extremely Heavy Rain 1. Continuous and Widespread

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Rainfall Distribution on 18-21 December 2006

1 Segamat 66 239 162 48 515 1872 Air Panas 98 477 149 58 782 2053 Labis 96 301 130 23 550 2054 K.Penghulu Chaah 103 251 84 9 447 2325 Ladang Chan Wing 92 245 101 2 440 2386 Empangan Sembrong 120 193 70 23 406 2087 Bandar Kluang 58 251 101 21 431 2438 JPSLarkin 80 292 66 23 461 227

Purata Jumlah Hujan Bagi Bulan Disember

Jumlah hujan 4 hari (mm)Bil Nama Stesen 18/12/2006 19/12/2006 20/12/2006 21/12/2006

3.8X

2 X

Dec. Monthly Rainfall

(mm)

4-DayRainfall (mm)

Station Name

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11/1/2007 12/1/2007 13/1/2007 14/01/2007

1 Air Panas Segamat 81 204 129 17 431 164

2 Empangan Bekok Batu Pahat 85 237 88 52 462 191

3 SgBekokB77 Segamat 99 247 93 32 471 168

4 Ladang Chan Wing Segamat 110 240 100 19 469 168

5 Ulu Sebol Kota Tinggi 124 290 76 42 532 176

6 Bukit Besar Kota Tinggi 147 234 42 35 458 176

7 Bandar Kluang Kluang 121 182 105 15 423 143

Purata Jumlah Hujan Bagi

Bulan Januari

Jumlah Hujan 4 hari (mm)Bil Nama Stesen Daerah

Rainfall Distribution On 11-14 Januari 2007

3.1X

Dec. Monthly Rainfall

(mm)

4-DayRainfall (mm)

Station Name District

2 X

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8 Feb 2007

ISOHYET HUJAN UNTUK TEMPOH 3 HARI (18-20 DISEMBER 2006) DI NEGERI JOHOR RAINFALL ISOHYET FOR 3 DAYS (18 - 20 DECEMBER 2006)

AT STATE OF JOHOR

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8 Feb 2007

CAUSES OF FLOODING

Extremely Heavy Rain 1. Continuous and Widespread2. Very Intense

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8 Feb 2007

6030350241Buluh Kasap

> 100> 100419234KompleksPenghulu Chaah

> 100> 100395257Ldg Chan Wing

> 100> 100447288Segamat

> 100> 100499320Labis

> 100> 100693535Air Panas

48 hrs24 hrs48 hrs24 hrs

Return Period (yrs)

Total Rainfall (mm)

Rainfall Station

Records of RainOn 18-21 December 2006

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Rain Continuous, Widespread and Very Intense, River swelled and overflowedLow lying areas (e.g. District of Batu Pahat)Land Subsidence (Peat swamp areas)Inadequate Drainage Capacity Antecedent condition from 1st flood eventSpring Tides

CAUSES OF FLOODING

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8 Feb 2007 Yong Peng Town, District of Batu Pahat on 19 Jan 2007 (Low lying area)

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Flood Mitigation Strategy

Flood Mitigation Strategy

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Jabatan Pengairan dan SaliranJabatan Pengairan dan Saliran

Flood Mitigation Strategy

Curative

Preventive

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Jabatan Pengairan dan SaliranJabatan Pengairan dan Saliran

Flood Mitigation Strategy

Curative

Structural approach/long termStructural approach/long term

Preventive

• Deepen and widen the river• Stabilization of river bank• Detention pond / Dams• Raise river levee• Build pumping station• Enhancement of flood warning system (siren

station) etc

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8 Feb 2007

Jabatan Pengairan dan SaliranJabatan Pengairan dan Saliran

Flood Mitigation Strategy

Curative

Preventive1) MSMA Urban Stormwater

Management (control at source)2) ESCP Erosion Sediment Control

Plan3) New approach House on stilt4) New approach Flood Hazard Map

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House on stilt

During flood event - Flood waters do not reach in the house.

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8 Feb 2007

Case Study

Flood Hazard Map For Johor- District Muar

- District Batu Pahat

Case Study

Flood Hazard Map For Johor- District Muar

- District Batu Pahat

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About the Flood Hazard Map –• Goal – to evacuate affected residents efficiently in a

safe and proper manner during floods

• A map that provides graphical information oninundation (inundation areas, depth, etc)

• Evacuation Info. (location of evacuation centers, well marked routes, highlight dangerous spots, etc.)

• The map is produced and publicised through a joint effort by those in disaster management and those in charge of rivers, eg. Disaster Management Center, Local Authority, Welfare Dept. DID etc.Source : Flood Hazard Map Manual for Technology Transfer March 2003, Ministry of Land, Infrastructure, Japan Infrastructure Development Institute, Japan)

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Objectives of Producing Flood Hazard Map In Malaysia

Objectives of Producing Flood Hazard Map In Malaysia

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Objectives of Producing Flood Hazard Map In Malaysia

• To produce and disseminate Flood Hazard Map so that people can evacuate in a SAFE, SMOOTH AND QUICK manner when flooding occur

• A useful tool for Director of State Security Department in Flood Relief Management e.g. issuing evacuation order / recommendation order, managing evacuation centers.

• To identify problems which may cause danger to the residents during evacuation

• To come up with a possible solutions to minimize any casualties and loss of properties

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Production of Flood Hazard Map In Malaysia

Production of Flood Hazard Map In Malaysia

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Malaysia

Malaysia consist 14 states includes the Johor State

Case Study : Johor - Located at Southern Peninsular Malaysia

- Consists 8 districts

JOHOR

Annual Rainfall : 3,000 mmTemperature : 210C - 32 0cRelative Humidity : 80 %Open Water Evaporation : 1600 mm - 1800 mm

ClimateMalaysia

Annual Rainfall : 3,000 mmTemperature : 210C - 32 0cRelative Humidity : 80 %Open Water Evaporation : 1600 mm - 1800 mm

Climate

KUALA LUMPUR

KELANTAN

SARAWAK

SABAH

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JOHOR WITH 8 DISTRICTS

1st case Study- District of Muar

AREA 1 : SEROM

AREA 2 : GERISEK

Production of Flood Hazard Map

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Inundated Areas at the District of Muar

AREA 1 : SEROM

AREA 2 : GERISEK

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HOW TO READ THE MAP

(Anticipated Inundation Depth)

Inundation depth less than 1 m

Inundation depth between 1 m to 2 m

Inundation depth between 2 m to 4 m

Inundation depth more than 4 m

less than 1 m

1 m – 2 m

2 m – 4 m

More than 4 m

AREA 1 : SEROM

AREA 2 : GERISEK

1

2

Legend :

Evacuation Centre1

MUAR RIVER FLOOD HAZARD MAP

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2nd Case Study- District of Batu Pahat

Sri Medan

Production of Flood Hazard Map

Extent of Flood Area : 62 295 ha

Inundation depth : 0.3 m – 3.0 m

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Sri Medan, District of Batu Pahat on

27 Jan 2007

• The worst flood occurred on the 2nd

wave of the flood event

• Inundation depth : 0.3 – 3.0 m

~ 0.8 m

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Sri Medan, Batu Pahat on 27 Jan 2007

Still inundated

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Interview with the evacuees

Condition in evacuation centre

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Facilities at the evacuation centre :

1. Water Tank

2. Mobile Toilet

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Problems and Possible SolutionsProblems and Possible Solutions

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Problems and Possible Solutions

- Identify flood prone area- Prepare flood inundation map

No Flood Hazard Maps4.

- Public awareness talk/seminar on the danger of flood – lives and property loss- Flood pamphlets- Give talk on the importance of FHM and organised drill session (before flood events

Residents reluctant to evacuate early

3.

- Installation of more telemetry rainfall and water level stations- Establish flood forecasting model

Flood forecasting2.

Equip more sirens and make good use of the siren from the Police Patrol Car / Fire Fighting and Rescue Truck

Flood warning1.

SolutionProblemsNo.

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Installation of high spot light at the gazetted evacuation centres

Difficulties to evacuate at night

8.

Gazetting of evacuation centresEvacuation centres not gazetted

7.

Installation of signage along the road which lead to the evacuation centre

No evacuation signage.6.

Installation of more pumping stations to cope with the flood discharge. Deepening of rivers and systematic drainage.

Inundation areas are very deep

From 0.5m to 3m in depth

5.

SolutionsProblemsNo.

Problems and Possible Solutions

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Establishing more DEM’sDEM (Digital Elevation Maps) not established. Lead to inaccuracy of demarcating flood depth

12.

- Acquire relevant base map

- Digitize flood hazard map

- Use digital terrain model

GIS based flood hazard map11.

Establishing flood mark on permanent features.

Flood-mark not widely established

10.

Organising frequent talk on FHM to give awareness to the publicOrganising ‘town watching’ to school children

Ignorant of the importance of FHM

9.

SolutionsProblemsNo.

Problems and Possible Solutions

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ConclusionsConclusions

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The production of Flood Hazard Map can be a useful tool and lead to a safe, smooth and quick manner thus less casualties and loss of properties.

FHM is very important before any structural measures undertaken and can serve to complement structural measures after they are implemented

Town watching and awareness talk on the importance of FHM are very useful to gather the latest information, the needs of the residents during evacuation process and the needs of the Government to save lives and properties

The cooperation between residents, Municipal Office and the Government will save a lot of lives and property loss, thus lead to a safe, smooth and quick evacuation.

Conclusions

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AcknowledgementAcknowledgement

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We would like to take this opportunity to thanks the Director ofHydrology and Water Resources Division, DID Malaysia, DID’sDistrict Engineer of Muar and Batu Pahat, supporting staffs and my colleagues for making this Flood Hazard Maps a success;

My deepest appreciation to ICHARM / JICA for giving DID Malaysiathe honour to host this seminar and thus giving us the opportunity to share our experience in producing Flood Hazard Maps in this seminar.

Acknowledgement

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Names of evacuation center : Penghulu Abdullah Primary School

Capacity of the evacuation centre : 500 people

Capacity of the evacuation centre during flood event : Approximately 300 people

AREA 1 : SEROM

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Names of evacuation center :Multipurpose Hall of Bukit Gambir

Capacity of the evacuation centre :1500 people

Capacity of the evacuation centre during flood event :Approximately 750 people

AREA 2 : GERISEK

Facilities for handicap person :1. Pathway2. Utilities room3. Hall4. Operation Centre Room5. Toilets6. Spacious parking area