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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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3.3.2. Secondary Data

The secondary data included rainfall and river discharge data; topographical sheet. "Table 3 ".

Table 3: Description of secondary data use

Data

Sources

Zone

Data period

Documents, articles, reports; theses

Library; Different offices (e.g: MERF); Online sites

Mono basin; Yoto district

Not determined

Monthly and annual rainfall data

Meteorological service of Togo (DNM)

Tabligbo

1971-2010

Monthly and annual Mono Discharge data

Hydrological service of Lomé

Athieme

1971-2010

Topographical Sheets

Cartography service of Lomé

The Yoto district

IGN 1984

3.3.3. Data Analysis

Articles, theses, reports etc... processing consisted in the reading of documents in order to come up with a consistent literature review. After this first step, the trend detection analysis in the annual and seasonal datasets was accomplished to assess climate change over the study area. In addition, the analysis of vulnerability's determinants under exposure, susceptibility and resilience and computation of flood vulnerability index were carried out. Moreover, an accurate flood vulnerability maps were created using ArcGIS techniques.

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