Evaluation of Evapotranspiration using FAO Penman-Monteith Method in Kano Nigeria

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Author(s) Isikwue, C. Bernadette | Audu, O. Moses | Isikwue, O. Martin
Pages 698-703
Volume 3
Issue 11
Date November, 2014
Keywords evapotranspiration, FAO Penman-Monteith Method, Kano.
Abstract

This work evaluated the reference evapotranspiration ETo for Kano (lat. 12.00N, long. 8.30E at an altitude of 472.45m above sea level) using the FAO Penman-Monteith Method, for effective irrigation planning and management due to the location of Kano within the semi-arid Sudan savannah zone of West Africa about 840 kilometers from the edge of the Sahara desert, with little rainfall. The climatic data used were obtained from International Institute for Tropical Agriculture, Ibadan (1977-2010). The results show that the lowest ETo (60.406 mm/day), was obtained in rainy season (August) due to the high humidity of the air and the presence of clouds, while the highest ETo (125.08mm/day) was obtained in dry season (February) as a result of hot dry weather due to the dryness of the air and the amount of energy available. Among the climatic factors affecting ETo, it was observed that solar radiation has highest effect on ETo since it provide the energy needed for evapotranspiration to take place.

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