Ghana

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Ghana
Burkina Faso
Uganda
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Application of satellite rainfall estimation to
flood early warning systems

• Satellite-based rainfall estimation (rfe)
  algorithms could potentially provide real time
  data on extreme rainfall events that could be
  utilised for flood early warning systems in
  Africa.
• Grimes Diop 03 studied the feasibility of
  using satellite rainfall estimates as input to a
  simple rainfall-runoff hydrological model, in
  order to forecast river flows. They used the
  Bakoye catchment area in Mali as a test case. The
  approach showed some skill at predicting river
  flow, but without contemporaneous gauge data for
  calibration (rare in Africa) it was not accurate
  enough to be useful operationally.
• Algorithms based on Cold Cloud Duration such as
  TAMSAT are statistical in nature, and need to be
  averaged over sufficiently large time and/or
  space scales to produce accurate estimates. For
  river flow forecasting time scales need to be of
  the order of a day or less, so the corresponding
  space scales must be an area of several thousand
  km squared. Therefore this approach is limited to
  medium to large river basins.