and Action Plan Sedon, Lao PDR RBP team Sombath Disaster Management - - PowerPoint PPT Presentation

ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Pilot River Basin Methodology and Action Plan

Sedon, Lao PDR RBP team

Training Workshop and Inception Seminar, Bangkok, 3-8th Feb 2019 Sombath – Disaster Management Malabu – Climate Change Management Vanseng – Water Resource Management

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

RBP Introduction

Item Value

Main river length About 260 km Catchment area About 7,300 km2 Main river structures Dams, Dikes (under construction)

 Xedon river basin is a part of the Mekong river basin.  The population within the basin was about 591,436 in 2005 and increased to 620,790 in 2007.  People suffer from floods every year especially in the districts, Salavan, Vapy and Khongxedon.

Bolaven Plateau

Selabam Dam

Vapy Khongxedon Salavan

Xeset Dam

• Table. Characteristics of Xedon River Basin

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Flood Impacts in Lao PDR

• 18 provinces
• 124 districts
• 2.382 villages
• 126.736 households, 616.145 people,

58 dead, 32 missing, around 7.615 people were evacuated and living in the temporary shelters, and will continue 2-3 years until their new houses were constructed.

Fl Floo

• od

d imp mpac acts ts FY FY 20 2018 18

• 17 province and capital

city

• 125 districts
• 2,433 villages
• 649,493 peoples
• 64 dead
• 28 missing

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

FY 2018

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Disaster risk management system and challenges

Challenges

• Information sharing with

line ministries

• Limitation of the data in

inventory

• Disaster Risk and

Hazard Map in detail are not available

• Human resource/expert

limited of the capacity on assessment

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Flood Situation in Xedon River Basin

Flood Inundation situation

• Floods happen every year in Xedon river basin, and especially 2013, 2018

and 2011/2017 were severe flood years during the last decade.

• Floods hit village several times in a rainy season. For example, local people

suffered from floods 7 times in 2018.

Flood Damage

• Severe damage was caused by 2013 flood in agricultural area (especially

rice fields), residential area, irrigation system, roads, schools, hospitals, etc.

• In case of Khongsedon district, 39,101 people were affected by the 2013

flood which equals to about 70% of the total population. Irrigation system and roads were damaged which were worth about 12.9 billion kip (1,548 thousand USD) and 12.8 billion kip (1,536 thousand USD), respectively.

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

The objectives of RBP

 To set up methodology of flood hazard and risk assessment for the target river basin  To demonstrate the methodology for better understanding and to create a guideline incorporating examples and opinions from AMS  To disseminate the demonstrated methodology to apply the other river basins

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Agencies to be involved

River basin pilot project (RBP) team**

DMH

meteorologist hydrologist

Champasak

coordinator

NDMO

Luang Prabang

coordinator

DCCM

hydrologist

DWR

hydrologist

NDMO, MoLSW: National Disaster Management Office, Social Welfare Department, Ministry of Labour and Social Welfare DWR, MONRE: Department of Water Resources, Ministry of Natural Resources and Environment DCCM, MONRE: Department of Climate Change Management, Ministry of Natural Resources and Environment DMH, MONRE: Department of Meteorology and Hydrology, Ministry of Natural Resources and Environment DOI, MAF: Department of Irrigation, Ministry of Agriculture and Forestry DOF, MAF: Department of Forestry, Ministry o Agriculture and Forestry DOR, MPWT: Department of Roads, Ministry of Public Works and Transport (officer in charge of landslide risk assessment)* DOR, MPWT: Department of Rivers, Ministry of Public Works and Transport

National project management committee

DOI DOR DOR DOF

Support team**

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Methodology for disaster risk assessment and mapping

Runoff Model (with HEC-HMS) Inundation Analysis Model (with HEC-RAS) Flood Damage Analysis Model (with HEC-FDA)

Input Output

• Precipitation
• Catchment area
• Land use
• Soil type
• River discharge hydrograph

Input Output

• River cross section
• Manning’s N value
• Land use
• Discharge hydrograph
• Stage hydrograph
• Inundation depth
• Inundation duration

Input Output

• Population
• Property
• Inundation depth
• Inundation duration
• Affected people
• Damage

Data Storage System (with HEC-DSS) Impact of Climate Change

Flood Hazard Mapping Flood Risk Mapping etc. etc. etc.

• Figure. Flow chart of the methodology for

disaster risk assessment and mapping

• Flood hazards and risks will

be analyzed with series of HEC software combining runoff model, inundation model and damage model.

• Outputs will be succeeded

as input of the next model.

• The impact of climate

change will be incorporated to the increase of rainfall and to the sea level rise.

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Activity plan

• Data collection for flood inundation modeling by the end of

April, 2019

• Case visits in the Philippines, Malaysia and Japan to learn

best practices in the countries (in March, July and November, 2019 respectively)

• Technical transfer on runoff modeling and flood hazard

modeling through collaborative work in the field study in May, 2019

• Develop a risk assessment guideline which is applicable for

AMS incorporating knowledge and experiences of each country

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Expected outputs/outcomes from RBP study

• Flood hazard map and risk map of the target river

basin

• Capacity building through collaborative work with

the RBP team and the project team

• Recommendation
• Preliminary planning for flood prevention and

mitigation

• Future developments by sharing the methodology

and experiences in the country

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Expectations for Capacity Building

• Set up pool of experts for flood risk assessment

by disseminating the experiences and knowledge in the project

• Improve risk and capacity assessment to better

target DRR interventions and support rapid analysis and end-to-end early warning

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ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Expectations for the Guideline

• Clarification of the target hazards and risks
• Which information should be included in flood

hazard maps and risk maps including examples from AMS

• How to evaluate the vulnerability including

examples from AMS

• Guideline should be visualized to give better

understandings (video lecture for online learning)

ASEAN PROJECT ON DISASTER RISK REDUCTION BY INTEGRATING CLIMATE CHANGE PROJECTION INTO FLOOD AND LANDSLIDE RISK ASSESSMENT

Thank you for your kind attention