Concluding Report
On“Roadmap toward Effective Flood Hazard Mapping in Cambodia”
PREAP SAMENG
Research and Flood Forecasting Office
Department of Hydrology and River Works (DHRW)
Ministry of Water Resources and Meteorology (MOWRAM)
Address: #576 N/R No.1, Sangkat Chak Anre Krom, Khan Mean Chey, Phnom Peng
Email : dhrw.cambodia@online.com.kh/sa_meng@yahoo.com.au

１―Curriculum of the training courses
I hope that this training course will be good chance to gain knowledge how to producing flood hazard
map and how to use it effectively.
In past the Department of Hydrology and River Works using software the flood forecasting model that
produce only bulletin and this information we send it to heading, local authority and concerning agency.
This training will teach to improvement of the base information (hydrological information, meteorology
and topographic data, historical inundation and flood information hydraulic and river engineering run offanalysis) to make a flood hazard map and how to distribution of these production to local authority to use
this map for evacuation to safety during a flood disasters in city/urban area the training course are mostimpressive and relevant they had improve my professional knowledge work in hydrological flood
forecast:
In general parts of the training were impressive, insightful and relevant the improved my professional
knowledge on hydrology, hydraulic and river engineering. Technical know-how on the methods topromote public awareness on flood damage mitigation is enhanced. I consider topics on Hydrological
Statistics; Flood runoff analysis and inundation analysis; Hydrologic Observation all objective is very
relevant most of the topics were very familiar.
２－Role of Flood Hazard Map to Mitigate Flood Damage in Cambodia
In Cambodia almost every year is effected by flood, flooding from the rivers and from theLocalize rainfall. Many people who live in inundation area are faced to the problems
Because of geograhpical condition, Cambodia had occoured annually Flooding from the rivers andlocal rainfall.it has impacted seriously for :-National infrastructure (road, bridge,…)
National flood control structure system ( dam, dyth, reveriore,levees break, embankment…)
Destroyed agricultural products, life of people, aninal and properties.
Lake suitable house for people
Lake clean water for driking when flood
Lake foods for eating because lose opportunity for accupation
Occurred desease for people and animal during and after flood

-Interfared with education ( especially in rural areas )Flood mitigation requires real-time information on weather and hydrological forecasting, so that
forecasts and warnings info can be issued to people at risk place, for example for merchants who mayneed to remove goods stored at ground to upper level. Forecasts of flooding are now become very
interested for stakeholders and local authority and international communities also. In Cambodia, flooding
is not restricted to the floodplains towns and rural areas (average flood and minimum flood, inundation),but the subject flash flooding and heavy flood is generally heavy not stability social and national
economic losses. Many emergency situations cannot be avoided, it must be tooke care about flood
management and must be ensuring the availability of financial, human and material resources. It is meantneeding the help from network, coordinate individuals, agencies and organizations in order to a rapid andeffective response. This is where “ Flood Hazard Mapping ” on going apply.

３- Effectiveness of Countermeasures for Flood Hazard Mitigating :Royal government of Cambodia established a mechanicism organization for disastermannagement from national till local level in vission to mitigate damages/risks by flood or drought
through using measures as below :Dessemination necessary information:-In the flood season, Department of Hydrology and River Works/MOWRAM is main role forobserving, investigating, forecasting and submitting hydro-meteorological data–information( water level, rainfall, flow ) to the country leader, concerned ministries, municipality, localauthorities and related agency by using Fax Machine, E-mail,internet, report, especially to thepeople by madia( television, radio, newspaper or magazine ).
-These information are very interesting from stackholders ( country leader, concerned
ministries,inter-national organizations,madia networks, provincial & local authoriries andpopulation ) because we no have Flood Hazard Maps yet. The activities of flood forecasting torquire printing and issueing bulletin evry day to users. Therefore, the subject involvedhydrological information, meteorology and topographic data, historical inundation and floodinformation hydraulic and river engineering run off analysis to make a flood hazard map andsubject to show how to disseminate or distribution of these production to local authority forevacuation to safety place during a flood disasters in city/urban area of this training course aremost impressive, relevant and improve my professional knowledge work in hydrological flood
forecast.
Evacuation Measures :- Refer to, religion traditional in cambodia, very most of temples are highland, flood can not
overflow, so that, most of refuge selters are temples ( pageda ), and public school or otherhighland were used for safety place also.
-These safety places has handled in during flood season and evacuation was carried out
emidiately when authorities known water level information at the upstream in emergency andsome floodplains. Before flood season coming, the local authorities granted advice orrecommendation to people for preparedness and prevention ( eg. Prepare necessary properties,
investigate water level, rainfall info by tv rado or see on boad in village or go to see safety place
nearest which sellected by authorities etc…).

- If any case evacuation step, provincial and local authorities, as well as local vollunteer incommunity ( particular, Cambodian Red Cross, National Committee for Disaster Management… )to consider first priority for elders, disabled or children victims by car, bus, motorbike but mostkind of evacuation by foot, aninal and bikecycle.
Humanity Relief
Permanent living at safety place, some places are short term but some places long term. Thus, it israther not difficult for short time ( less than 15 days ) but it is very difficult for long term because
they are able force with decease, lack foods, lack clean water… most of they are elders, children
and disabled. The solutions of these problems, national, provincial & local authorities suggested
for contribution from inter-national humanity person ( CRC & NCDM are main role ) as : foods,medicine, facility or material which support for daily livelihood of those victims ect.
４-The “ Action Plan” of Making Flood Hazard Maps in Cambodia :Base on, scale of inundation in the past impacted seriously with everyday livelihood of the people.
Overall natural disaster management system of Cambodia doesn’t respond yet for all actual events andneeds of the people in the meaning to mitigate and reduce damages/hazard/risks by flood/inundation ordrought. Refer to, the above requirements and reasons demand to improve this system throughconsideration and establishment Flood Hazard Maps because Cambodia never consist “ Flood Hazard
Map” to use in its operation of resettlement during inundation disaster to occur. Therefore, “ Action Plan”
for making flood hazard maps will be chosen Tonle Toch River Basin to the point Prey Veng province tobe as first priority zones for pilot case studies. It will be included indicators as below :1- Tonle Toch River Basin to the point Prey Veng will be select for making flood Hazard Maps.
Ministry of Water Resources and Meteorology and National Committee Disaster Management
will be expected mainly role in the processing of this plan.
2- Tonle Toch River Basin is a tributary of Mekong river. It pass 2 provinces ( Kompong Cham &Prey Veng province ). Prey Veng province has been effected seriously by Mekong flood through thisriver among of 24 provincial and municipal of Cambodia because of ¾ of the total areas of Prey Veng
most of floodplain, especially 2 of 12 districts of Prey Veng was suffered seriously and longest prone
inundation ( Peam Ro and Ba Phnom district ). Below information are necessary conditions &reasons will be selected : Prey Veng is covers an area 4,883 quire km and it was divided two main
regions :*First region is Flood plain which flooded every year from the Mekong River. This region has
many Streams, tributaries, lakes and Reservoirs for irrigation in dry season and supplementary crops.
It is a kind of delta region that have more citronella land.
*Second region is central-plain which cover byrain-rice fields. They have not more water resource.
They have depended on the rainfall. This region has asmall-scale irrigation systems and some places haveused ground water for irrigating.
Prey Veng province was divided 12 districts, 116
Communes and 1,138 Villages. Totally populations
are about 1,025,331persons .Among of those, female
are about 541,572 persons equal 52.8 % and mans
are about 483,759 persons equal 47.2 %. Totally

Water overflowed in village in 2002

families are 208,727 and density of people about 210 pers/km2.
Prey Veng has 2 main rivers & 2 streams(Kompong Trabek & Stung Slot):*Mekong River is far about 56 Km crossing Peam Ror and Peam Chor districts.
*Tonle Toch River is far about 193 Km crossing Sithor Kandal, Pear Raing, Kampong Laev,
Peam Ror, Ba Phnom, Kampong Trabek, Preah Sdach and Peam Chor districts.
In the covers area about 488,300 ha, it was divided: land for rice field about 310,000 ha,( amongthose, rain rice is about 238,000 ha; dry rice is about 60,000 ha), land for crops is about 12,000 ha;
forest land is about 19,461 ha; land use is about 45,518 ha and other lands about 107,286 ha.
MAP OF PILOT CASE STUDY LOCATIONTONLE TUOCH
RIVER BASIN

3- Cambodia is a new developing country among regional as the same some countries in the world. The Royal Government ofCambodia
same MOWRAM or NCDM are very interesting with the strategy fighting inundation. They are measuring
everything to mitigate damages/risks in order to reduce poverty of people to include prevention, preparedness measures also butpovertyindicator, it has interfered these procedures, didn’t respond all events and requirements, especially financial and human resource area,
very lake & limited in present, not suitable national and international situation. Both elements seem to be thought that, they should be
able to impact the plan of Flood Hazard Mapping.
4-Propose “Action Plan” within the next five year :Project Name: Flood Hazard Mapping (FHM ) Duration: 1 January 06– 31 December 2010
Target Area: Tonle Touch River Basin, Prey Veng Province Date: 28 Nov 05
Narrative SummaryOverall Goal• To mitigate damages/hazard/risks caused by inundation• Project Purpose
FHM will be useful in flood fighting countermeasures
Output1Enhancement of Disaster Management System involve
establishing and disseminating FHM.
2-An effective Flood Hazard Map will be established.
1- To achieve most belief of the people for
quality of Flood Hazard Maps.

Objective Verifiable Indicator• 90% of damages/hazards will be reduced from July
2011

Mean of verification• The valuation report by
Ministry of Planning• 80% of the people in emergency will be safety byflood in the target group at the end of year 2011

• concerned data will be correctedby original institution.

• 2 time of training course & many times of meeting• The source data is surveyed bywill be hold
MOWRAM & NCDM
• 75% of equipment and facilities of information• The source data is surveyed byinvolved FHM will be improved and maintenance on
MOWRAM & NCDM
yearly• The source data is surveyed by
MOWRAM & NCDM
• 85 % of people in target areas will belief for FHM.

InputPersonnel• National working group
1.1-Review existing regulation of establishment• Provincial working group
NCDM to include FHM Plan Strategy• District working group
1.2-To hold workshop on “ FHM Plan”• Commune working group
1.3-Provide training courses on methodology to make• Volunteer group of communities
FHM for concerned institutions, municipalities, local
Equipment
authorities and volunteer target group of local• Hydrological tools ( some area )communities.
• ICT tools
2.1- Data Collection• Transportation (Cars/Motorbikes/Bike-cycle)
2.2-Setting of basal condition• Loud Speaker
2.3-Drawing of basal maps
2.4-Examination of flood Information in flood
Stationary / Facilityseason• National
2.5-Examination of evacuation information in• Provincial
inundation season• District
2.6- Meeting to discuss with all stakeholders on
above examinations and basal maps
• Commune
2.7- Drawing of original flood hazard maps
• Community areas
2.8- Drawing of draft flood hazard maps
2.9- publication & dissemination of draft FHM
2.10-Test draft FHM in the actual events
2.11-Controlling, monitoring &Evaluation
2.12- Improving Flood Hazard Maps
2.13- Publication & dissemination of FHM
3.1- Evaluation of overall project3.2- Reporting
3.3- Final workshop to assessment project

Activities

Notice: FHM : Flood Hazard Map, NCDM : National Committee for Disaster Management, DHRW : Department of Hydrology and River Works
MOWRAM : Ministry of Water Resource and Meteorology

５-Suggestions for a more meaningful training course?
This training course always attended by the lecturers with high knowledge and most experiences intheir works for a long time. Relation the schedule of program as : kind of subject, lesson, documents,
materials or times of field trip & town watching step and time of each theory lecturing are suitable andenough but it is seemingly short for practice exercises lecturing. If we talk about “Flood Hazard Maps” fordeveloping countries as Lao PDR & Cambodia to be still a new topic. Thus, we should need much time andknowledge involved operating in the office and in the field. Accordance with, I would like suggest to add theduration ( 2-3 days more) for this step through extending duration of the course or reducing theory lecturing
session.
Anyway, I would like request to include a few subjects of training courses concerned flood/inundation
management such as “ Flood Forecasting & Management” or “Water Quality Controlling” because they
are a main component for establishment and handling flood hazard map in the future.