Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Allemagne → 2018 → Coupled movement of liquid water, water vapor, and heat in deep vadose zones

Martin-Luther-Universität Halle-Wittenberg (2018)

Coupled movement of liquid water, water vapor, and heat in deep vadose zones

Raneem Madi

Titre : Coupled movement of liquid water, water vapor, and heat in deep vadose zones

Auteur : Raneem Madi

Université de soutenance : Martin-Luther-Universität Halle-Wittenberg

Grade : Doktorgrades der Naturwissenschaften (Dr. rer. nat.) 2018

Résumé
Groundwater is often the only source to meet the increasing water demands in arid regions, therefore the accurate quantification of the unsaturated zone water fluxes there is essential for the estimation of groundwater recharge. This thesis aims to improve our ability to model these fluxes by testing the physical-mathematical properties of many of the available parameterizations of the soil water retention curve and improving them where necessary and based on that carrying out a simulation study of coupled liquid water, water vapor, and heat flows in a 100 m bare soil profile under arid/hyper-arid conditions to clarify the potential role of water vapor flow and the way the atmospheric input signal travels downward through the vadose zone for two soil hydraulic parameterizations suitable for dry conditions. This study points to the importance of carefully considering the soil hydraulic parameterizations to be used for long-term water balance studies that aim to determine or predict the variation of seasonal water availability to plants or long-term groundwater recharge to assess the sustainability of extractions from an underlying aquifer.

Mots clés  : Arid/Semi-arid regions ; groundwater recharge ; deep vadose zone ; soil hydraulic properties ; parameterizations ; liquid/vapor water flow ; atmospheric signal ; long term simulations

Présentation

Version intégrale (5,63 Mb)

Page publiée le 8 janvier 2019