Towards a Rainfall Estimation Using Meteosat Over Africa

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by Yves Arnaud, ORSTOM BP, Montpellier, France,
Michel Desbois, ORSTOM BP, Montpellier, France,
Alain Gioda, ORSTOM BP, Montpellier, France,

Document Type: Proceeding Paper

Part of: Hydraulics/Hydrology of Arid Lands (H²AL)

Abstract: The scope of the research is to develop a method of rainfall estimation at both small space and time scales (9 pixels -225 km2-, and single shower duration - several hours-) using Thermal Infra-Red Meteosat data. The method is based on the cloud-top radiometry. The study area is located between 13°-14°N and 2° -3°E (Niamey area). A dense recording raingauge network implanted in Niger provides the data to calibrate satellite estimations. A relationship was found to link the maximum digital count to the squall line rainfall amount. The use of area average rainfall estimates increases the relationship's reliability.

Subject Headings: Rainfall | Computer networks | Developing countries | Thermal effects | Satellites | Hydrologic data | Research and development | Rainfall duration | Africa | Niger

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