Direction of the wind is Southwest to Douala and Nkongsamba, the West and Southwest for Ngambe, from northeast to Southwest for Dschang (influence of the terrain). Wind due to the monsoon. There are about 48% of the time the wind silent in Douala, whereas 70% in Ngambe and Dschang.Frequency of wind 1% according to the observations indicate that the wind speed of about 7 m/s. precipitation estimation 2.6 yearsThe mean annual rainfall of the area of research (including both line 1 and line 2) is calculated according to the following methods:• Arithmetic• Theissen polygons• The equal treatment
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