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Amsterdam Vrije Universiteit Pays Bas (2007)

Soil moisture dynamics and evapotranspiration at the fringe of the Botswana Kalahari, with emphasis on deep rooting vegetation

Obakeng, O.T.

Titre : Soil moisture dynamics and evapotranspiration at the fringe of the Botswana Kalahari, with emphasis on deep rooting vegetation

Auteur : Obakeng, O.T. (Obolokile Thothi)

Université de soutenance : Amsterdam Vrije Universiteit

Grade : Doctor 2007

Conclusions
The main conclusion is that this study has proved that several tree species in the Kalahari desert are ab le to extend their roots to great depths, of more than 70 m locally, and to extract soil water and/or groundwater from such depths. This means that water which has escaped evapotranspiration in the main root zone (the upper 4 m), and has percolated to greater depths or even has reached the groundwater table, can still be subjected to evapotranspiration. These findings are to be taken into consideration in groundwater recharge studies and evaluation of sustainable resources in (semi-)arid areas. Additionally, this shows that a better understanding of moisture dynamics and water consumption in connection with climatic data in general, is essential for a sustainable use of the Kalahari environment and its resources

Mots clés : Rainwater infiltration, soil moisture transport and evapotranspiration in the Kalahari semi-desert (Botswana), evapotranspiration, Acacia

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Page publiée le 4 avril 2008, mise à jour le 2 février 2018