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Theses

La grêle en Tunisie : diagnostic et gestion d'un risque agricole émergent

Abstract : In Tunisia, the random character of hail phenomenon, which has as corollary its extreme variability, in frequency, location and intensity, prevented a continued study of this kind of falls. The lack of long periods of observation and the gaps in the available data level explain the little interest that hail suggested among scientists. Hail falls cause heavy agricultural damage every year which raise different elements at risk especially crops while no efficient mean of protection is widely used. The hail falls in Tunisia follow a Mediterranean rhythm as the other forms of precipitation such as rain. This phenomenon which seems very localized in Tunisia, concerns particularly the northwest and the west central regions of the country, with the highest reliefs of the country. The tracks of hail showers follow west/east, northwest/southeast and southwest/northeast directions. In addition, and despite the damages that result from the phenomena which may touch many valuable sectors, agriculture is the economic sector that more suffers from hail especially when hail falls in spring and in summer. Some years, farmers find their harvests totally destroyed by this plague. The region of Kasserine in the central western of Tunisia is the most vulnerable region and its apple orchards are the most touched. The losses are mostly classified more and more dangerous when anti-hail tools and agricultural insurance systems against this plague are not often used by farmers. [etc.]
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Mohamed Mohsen Latrach. La grêle en Tunisie : diagnostic et gestion d'un risque agricole émergent. Géographie. Université Paul Valéry - Montpellier III, 2013. Français. ⟨NNT : 2013MON30022⟩. ⟨tel-00941785⟩

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