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Rainfall Variability along the Southern Flank of the Bambouto Mountain(West-Cameroon)

Kengni, Lucas and Tekoudjou, Hernes and Tematio, Paul and Pamo Tedonkeng, Etienne and Tankou, Christopher Mubeteneh and Lucas, Yves and Probst, Jean-Luc Rainfall Variability along the Southern Flank of the Bambouto Mountain(West-Cameroon). (2009) Journal of the Cameroon academy of sciences, vol. 8 (n° 1). pp. 45-52. ISSN 9956-26-000-2

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Official URL: http://www.ajol.info/index.php/jcas/article/view/87038

Abstract

This paper presents the rainfall variability along the southern flank of the Bambouto mountain. Data were collected from rain gauges, while spatial variability was estimated through daily recorded data. Monthly and annual data were used to draw isohyetes via the triangular method, with linear interpolations between observation points. Results show that rainfall is highly variable along the slope. Daily rainfall amounts range from 0.1 mm to 120 mm. Mean yearly rainfall is 1918.1 mm. Rainfall amount does not have a linear relationship with altitude. Dschang is characterised by abnormally high rainfall. Following a North-South direction, rainfall decreases from Dschang to a Melang-Loung-Djuttitsa axis. From this axis, the gradient reverses as rainfall increases rapidly towards the Mélétan mountain. The existence of the relatively dry zone within the hillside seems to be due to the influence of two air masses. The first is cold and very wet which moves from the Mamfe basin to the summit zone where it starts to warm up as it flows towards Melang and Loung where temperature increases. The second comes from the south to south-east monsoon which is also impoverished during the ascension to higher altitudes. It is also likely that a third air mass from the dry harmattan is involved depending on the position of the ITCZ.

Item Type:Article
Additional Information:Thanks to Revue de l'académie des sciences du Cameroun. The definitive version is available at http://www.ajol.info The original PDF of the article can be found at Journal of the Cameroon academy of sciences website : http://www.ajol.info/index.php/jcas/article/view/87038
HAL Id:hal-00830146
Audience (journal):National peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
French research institutions > Institut de Recherche pour le Développement - IRD (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Université du Sud Toulon-Var - USTV (FRANCE)
Other partners > Université de Yaoundé I (CAMEROON)
Other partners > Université de Dschang (CAMEROUN)
Laboratory name:
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Deposited By: Jean-luc PROBST
Deposited On:03 Jun 2013 14:43

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