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Method for fluvial and pluvial flood risk assessment in rural settlements
Maurizio Tiepolo1, Elena Belcore2, Sarah Braccio1
1DIST-Politecnico and University of Turin, Italy.
Methodsx
|August 26, 2021
Summary
This study presents a new flood risk assessment method for the Global South, integrating multiple hazards and community input. It quantizes risk reduction benefits and identifies opportunities for rural development, enhancing local disaster risk reduction strategies.
Area of Science:
- Environmental Science
- Disaster Risk Management
- Geography
Background:
- Flood risk assessments in the Global South often lack local relevance, typically focusing on single hazards and static conditions.
- Existing methods fail to identify flood-prone assets or detailed risk reduction measures, hindering effective disaster risk reduction.
- The United Nations Sendai Framework emphasizes the need for improved local-scale disaster risk reduction strategies.
Purpose of the Study:
- To introduce an innovative flood risk assessment method tailored for local needs in the Global South.
- To address limitations of current assessments by incorporating multiple hazard types, dynamic risk scenarios, and community participation.
- To quantify the benefits of risk reduction and explore potential opportunities for rural development linked to flood events.
Main Methods:
- A participatory flood risk assessment method was developed, integrating local and technical knowledge.
- Utilized orthophotos from unmanned aerial vehicles and very-high-resolution satellite imagery to identify flood-prone assets.
- Considered three hazard types (backwater, fluvial, pluvial) and multiple risk scenarios for comprehensive analysis.
Main Results:
- The method successfully identified flood-prone assets and quantified both monetary and intangible benefits of risk reduction.
- Participatory risk analysis and evaluation improved the accuracy and relevance of the assessment.
- Demonstrated the potential for flooding to present opportunities for rural development.
Conclusions:
- The developed flood risk assessment method is effective for local-scale planning and decision-making support in disaster risk reduction.
- Integrating diverse knowledge sources and advanced imaging technologies enhances the robustness of flood risk assessments.
- The approach highlights the dual nature of floods, presenting both risks and opportunities for sustainable rural development.
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