Investigation of groundwater recharge through unsaturated zone studies in arid regions

Kallioras Andreas, Khan Abidur, Reshid Mustefa, Todoroff Pierre, Pfletschiger Heike, Schuth Christoph, Rausch Randolf, Al-Saud Mohammed. 2011. Investigation of groundwater recharge through unsaturated zone studies in arid regions. Geophysical Research Abstracts, 13, Résumé, 1 p.

Résumé : Unsaturated zone processes play a key role in groundwater recharge as the thickness of the unsaturated zone in arid areas may reach several tenths of meters. In principal, the water trapped in the unsaturated zone represents a historic record of infiltration events potentially enabling a quantification of present and past groundwater recharge. We here present an approach for the investigation of the unsaturated zone through a combination of field techniques. Unsaturated zone experiments are carried out at selected field sites in the Kingdom of Saudi Arabia, representing different potential groundwater recharge scenarios in arid regions. Volumetric soil water content within the unsaturated zone is continuously monitored in-situ using Time Domain Reflectometry (TDR). The in-situ investigation of the unsaturated zone is complemented by the determination of high resolution temperature profiles. Aditionally, multilevel soil sampling for the extraction of the containing pore water is applied for the dating of the groundwater age through the determination of its isotopic composition( _18, _2, 3H, and 36Cl). Installation of equipment and the retrival of undisturbed soil samples is enabled by using direct push technologies. It is expected, that the combination of the above mentioned techniques will result in an accurate quantification of present and historic groundwater recharge in arid environments. (Texte integral)

Mots-clés Agrovoc : hydrologie, eau souterraine

Mots-clés géographiques Agrovoc : Arabie Saoudite

Classification Agris : P10 - Ressources en eau et leur gestion

Champ stratégique Cirad : Axe 6 (2005-2013) - Agriculture, environnement, nature et sociétés

Auteurs et affiliations

• Kallioras Andreas, Darmstadt Technical University (DEU)
• Khan Abidur, Darmstadt Technical University (DEU)
• Reshid Mustefa, Darmstadt Technical University (DEU)
• Todoroff Pierre, CIRAD-PERSYST-UPR SCA (REU)
• Pfletschiger Heike, Darmstadt Technical University (DEU)
• Schuth Christoph, Darmstadt Technical University (DEU)
• Rausch Randolf, GTZ (DEU)
• Al-Saud Mohammed, Ministry of Water and Electricity (Arabie Saoudite) (SAU)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/559622/)

Métriques

[ Page générée et mise en cache le 2024-01-28 ]