2017 | OriginalPaper | Buchkapitel
10. Monitoring Soil Moisture Content of Jessour in the Watershed of Wadi Jir (Matmata, Southeast Tunisia)
verfasst von : Fethi Abdelli, Mohamed Ouessar, Salah M’Hemdi, Messaoud Guied, Houcine Khatteli
Erschienen in: Water and Land Security in Drylands
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Abstract
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The jesr ensures water storage in soil, which varies on average between 100 m and 200 mm. However, in wet periods, this storage jesr can exceed 300 mm but can drop as low as 50 mm in dry periods (as recorded in the jesr of Téchine).
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Only one effective rainfall annually can ensure adequate water supply for the rest of the hydrological year. During wet periods, olive trees extract water from upper soil horizons whereas they exploit the deeper horizons during summer and drought periods.
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The use of the theoretical potential at permanent wilting point of pF = 4.2 seems to be inadequately adapted to olive extraction capabilities and tends to underestimate the amount of water that the adult olive trees can extract.
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Thus, jessour can adequately ensure water supply of olive trees while ensuring effective erosion control in the mountains of Matmata and landscape ecology enhancement.