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Flood vulnerability assessment of donstream area in Mono basin in Yoto district, south-eastern Togo


par Abravi Essenam KISSI
University of Lome - Master 2014
  

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1.2 Research Objectives

The overall objective of the current study is to conduct indicator-based flood vulnerability assessment of the downstream part in the Mono River basin in the Yoto district to compute a Flood Vulnerability Index in order to assess the conditions which influence flood damage in the study area and pinpoint the most vulnerable villages to flood for an effective flood risk reduction. More specifically, the present study attempts to:

1. examine the long term trends in rainfall and discharge data for a record period of (1971-2010);

2. identify the determinants of communities' vulnerability to floods under the three factors of vulnerability (Exposure, Susceptibility and resilience);

3. apply FVI methodology to compute Flood Vulnerability Index of the target area.

1.3. Research Questions

This case study strives to answer the following questions:

· Do the occurrence of floods hazards relate to change in rainfall and river discharge?

· what are the conditions which influence flood damage in the study area ?

· what are the most vulnerable villages to flood in the study area?

1.4. Research Hypothesis

While the frequency and the intensity of flood hazards in the study area may be related to change in rainfall and river discharge patterns, interaction between the human-environment or socio-ecological system could be the major determinant of households, and communities' vulnerability to such hazard. Analysing trend in rainfall and discharge time series and understanding the conditions which influence flood disaster in the study area should be reliable information to pinpoint local hotspots of flood vulnerability.

1.5. Thesis Structure

Chapter I covers the background information, the problem statement, the objectives, the justification, significance of the study and its objectives and the scope of the study. Chapter II discusses the definition of related concepts to the research topic and literature review on index approach to measure vulnerability to natural hazards. Chapter III includes both the research methodology and data collection process to answer the research questions and to test the research hypothesis. Chapter IV explains the empirical findings on the assessment of climate change, flood frequency analysis and flood vulnerability assessment. Finally, the last chapter includes conclusions as well as way forward for future research and the limitation of the current study.

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