FLOOD HAZARD MAPPING 2006

CONCLUDING REPORTACTION PLAN TOWARD EFFECTIVE FLOOD HAZARD
MAPPING IN INDONESIA

Regional Training Course on Flood Hazard Mapping
30 October - 2 December 2006
JICA - Tsukuba International Center
JAPANPrepared bySurendro Andi Wibowo
Directorate of River, Lake and Dam
Directorate General of Water Resources
Ministry of Public Work
Indonesia

1

FLOOD HAZARD MAPPING 2006
A. The role of Flood Hazard Maps to mitigation flood damages in mycountry
A-1 The flood status in my country

Indonesia

isarchipelagiccountryandlocatedinsouth-east

Asia.

Geographical position in 950-1410 east longitude and 60 north latitude 110south latitude. There are more than 17.000 islands with population amount
220 million people.

Figure 1
Location of Indonesia

As country which having location in equator area, Indonesia have tropicalclimate by two season. That is dry season and wet season. High rainfall
cause floods in every wet season. Every floods cause considerable economic
losses, untold human misery and suffering and loss of life.
Flood effect measures base on function usage of asset, with can be devided
3 category of classified is folllowed :•National Effect•Regional Effect•Local EffectIt is base on influence of generated effect. National effect has understandingthat floods disaster influence stability of national, influencing national
development by totally, swallowing very big victim and knock over in strategic2

FLOOD HAZARD MAPPING 2006
points like international airport, strategic industrial, location including someprovinces (pass by province).
Regional effect has understanding that floods disaster influence stability ofregional, influencing development of regional, swallowing big enough victim
and location including some districts ( pass by districts).
Local effect has understanding that floods disaster have the character of
locally, swallowing victim not big.

Tabel. The classification and carategory areal effect flood disaster
PROOFING AREA
1. TRANSPORTATION- Airport and access road
- Harbour and access road

NATIONAL Effect

REGIONAL Effect

LOCAL EffectNational Airport
Domestic Airport

Pilot/Local Airport
Pilot/Local Harbour- Road / highway- Treck / trem
- Train Station- Bus Station

International Airport
International Harbour(outlet Import Export)
Road state / tol Road
Inter Province & strategic
Train Station Clas I
Bus Station inter Province

Province Roads
Road inter City
Train Station Clas II
Bus Station inter City inone ProvinceRoad Reagen./ Local Road
Road internal City
Train Station Clas III
Bus station internal city

2. INDUSTRIES & TREAD- Industri Area
- Market Area
- Office Area
- Storage Area

Area > 2.000 ha
Area > 1.000 ha
Area > 500 ha
Area > 1.000 ha

Area 500 – 2.000 ha
Area 200 – 1.000 ha
Area 100 – 500 ha
Area 200 – 1.000 ha

Area < 500 ha
Area < 200 ha
Area < 100 ha
Area < 200 ha

Area > 5.000 ha
Population > 1 million
Area > 10.000 ha
Population > 0,5 milllion
National scope
Ancient heritage
Trans > 10.000 family

Area 1.000 – 5.000 ha
Population 0,5-1 million
Area 5.000 – 10.000 ha
Population 0,2 -0,5 juta
Regional scope
Ancient heritage
1.000 – 10.000 family

Area < 1.000 ha
Population < 0,5 mil
Area < 5.000 ha
Population < 0,2 jmila
Local scope
Ancient heritage< 1.000 family

Area > 15.000 ha
Area > 25.000 ha
Area > 20.000 ha
Area > 10.000 ha

Area 5.000 – 15.000 ha
Area 10.000– 25.000 ha
Area 5.000 – 20.000 ha
Area 3.000 – 10.000 ha

Area < 5.000 ha
Area < 10.000 ha
Area < 5.000 ha
Area < 3.000 ha

2. HOUSING & RECREATION
AREA- Urban- Rural- Recreation- Culture- Transmigration Area
3. Agriculture- paddy- Farm- Plantation- fish pond

A-2 The Outline of the present countermeasures for mitigating flooddamages in my country

In general policy of countermeasures for mitigation flood damages divided to:a. Structural measures:A) Levees and floodwallsB) Channel modifications

3FLOOD HAZARD MAPPING 2006
C) By-pass floodways
D) Retarding basins and flood storage areas
E) Flood mitigation reservoirs
F) Drainage evacuation systems
b. Non structural measures:A) Land use managementB) Property acquisition and floodway clearanceC) Modification of catchments conditions and on-site storageD) Flood forecasting and warningE) Public information and education
F) Flood proofing of buildingsG) Evacuation from endangered areas
H) Flood fightingI) Flood reliefJ) Flood insuranceK) Flood adaptation

A-3 Why do I think flood hazard maps will be useful in my country?

The reason of flood hazard maps useful in my country:-It is effective, environmental friendly and not as expensively as structuralmeasure.

-Easy way and not need natural resources.

-Very few structural measures.

-Giving guidance to society in face of floods danger.

B. The allocation of roles in making flood hazard maps in my country
B-1 Which organization should hold the main responsibility for making
a fundamental map such as an anticipated inundation area map?

4

FLOOD HAZARD MAPPING 2006
Many stakeholders in concerned and hold responsible for making afundamental map. They are:- Government- Private sector- and society.
All the stakeholders expected can coordinate in making and determining themap of floods area. From government especially local government have very
big role in making fundamental map because it is level government who mostunderstanding area condition.

B-2 Which organization should hold the main responsibility for making
and disseminating flood hazard maps?

After finish fundamental maps, next step is making flood hazard maps. Thesemaps give information to people about inundation area, route of evacuationand evacuation center. Flood Hazard Maps disseminate to every one andalso is placed at strategic places where people easy read especially atinundation area.
All stakeholders are also expected to coordinate in making and disseminatingof Flood Hazard Maps. This Activity is emphasized be achieved every city sothat local government very hold responsible in this problem.

C. The Action Plan of making flood hazard maps in my country
C-1 Which area do you choose for the target river basin area? Why?

I choose Ciliwung-Cisadane River Basin as my target in making of FloodHazard Mapping because:- including area of Jakarta, capital of Indonesia so that is strategic location- Floods disaster often occur- Place where I work and leave.

5FLOOD HAZARD MAPPING 2006

Figure 2
City Map of Jakarta

Figure 3
Ciliwung-Cisadane
River Basin

C-2 What do you think is necessary to make flood hazard maps in thechosen area? Do you have data, maps, or budgets necessary formaking flood hazard maps?
I try to fulfill the request action plan flood hazard maps, and I take sunter area,a part of ciliwung-cisadane river basin, as my focus. In this location everyyear floods often occur. I have no much data and map, but I will search andcollect from related institute.

6

FLOOD HAZARD MAPPING 2006

Figure 4
Sunter area in CiliwungCisadane River Basin

C-3 Propose your own Action Plan within the next five years

I see flood hazard mapping very useful if applied in my country. After I returnto Indonesia, I plan to disseminate this activity especially in my department.
My action plan within the next five years:
a. Within one year
- make a report about this training and flood hazard mapping for myorganization first.
- Introducing flood hazard mapping in my office especially to our young
engineer through symposium and discussion.
- Data collection (historical of past flood, hydrology, topography, dikecondition, pumping station condition, drainage system, water gate)b. Middle term Plan (next 2-3 years)- Conducting FHM training course for all young engineer of Directorate
River, lake and dam- Data collection- Monitoring and evaluating flood hazard maps.

7

FLOOD HAZARD MAPPING 2006
- Map verification,- Identify inundation areasc. Long term plan (next 4-5 years)- Propose for making guidance standard of flood hazard maps.
- Data collection- Improving and developing FHM- Updating of flood hazard maps.
- Dissemination and use of flood hazard map

C-4 What seems a problem in making flood hazard maps in yourcountry?

The main Problems in making of flood hazard maps in my country are:- Limited of budget- Availability of data alike Topographic maps
- Human resources
Solution alternatives:- Arrange priority of flood hazard maps project- Collecting data from all institute related with flood hazard maps.
- Flood hazard mapping training course.

D. My own Flood hazard map on Ise city
D-1 What is the improvement from the flood hazard map on Ise city currently
available?

I have tried to make Flood Hazard Map on Ise City. Difficult Enough and requirecomplex data. Ise City Flood Hazard map currently have good enough, loading
information required by is society in face of floods disaster.
For improvement, this Flood Hazard Map requires to be updated, and bedisseminated to society especially young generation.

8FLOOD HAZARD MAPPING 2006

Figure 5
My own flood hazard
map on Ise city

E. Conclusion•The Flood Hazard Map provided is very informative but needs updatingfrom to time, review, study and analyzed.

•FHM is very important before any structural measures undertaken•

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

F. Advise / Suggestion
My suggestion for making this training course more meaningful
1. Exercises and practices are not enough time available. It should be longer.
2. Materials of training should give in book and CD, included software forexercises and file of lecture presentation.

9