Fig. 1. The south-west of Madagascar is the dryest part of the island, and Hatokaliotsy belongs to the absolutely dryest areas (Battistini, 1964a). The rare rainfalls begin in December and end in March or April, but in some years may not appear at all (e.g. 1990-1992). The greater graph shows the variations in total annual rainfall between different years, as they were measured in the 50ies at several meteorological station in villages near Hatokaliotsy. The smaller graph shows variations during the year in the village Itampolo (directly on the Hatokaliotsy border).


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