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United Arab Emirates University (2009)

Assessment of Groundwater Vulnerability to Seawater

Ayeda Matar AI-Hosani

Titre : Assessment of Groundwater Vulnerability to Seawater

Auteur : Ayeda Matar AI-Hosani

Université de soutenance : United Arab Emirates University

Grade : Master of Science (MS) 2009

This thesis encompasses six chapters. Chapter 1 discusses the importance and distribution of water resources at the global level and presents a summary about the water resources availability in the Gulf Cooperation Council (GCC) countries, including UAE. The objectives of the study are also included. Chapter 2 discusses seawater intrusion and its mechanism under the dispersion-zone approach. Salinization sources are elaborated and the components of seawater are defined. Modeling approaches are presented and the causes of the seawater intrusion problem are outlined. The groundwater flow and solute transport governing equations are presented. SUTRA and other available numerical models are briefly discussed. Chapter 3 reviews the geological and hydrogeological settings of the aquifer system in the area of Wadi Ham. The geometric and hydrogeological parameters are defined and the historical records of groundwater levels in a number of observation wells are discussed. Previous geophysical Investigations to assess the seawater intrusion in the Wadi Ham aquifer are presented. Chapter 4 discusses the calibration and validation of numerical models in general and elaborates the calibration and validation of SUTRA model in the area of Wadi Ham in particular. SUTRA Argus One modeling environment is presented and its capabilities and limitations are outlined. The calibration and validation of SUTRA are conducted on a set of groundwater level data. Chapter 5 discusses the simulation runs that have been conducted under steady- and unsteady flow and solute transport conditions. The simulation is conducted for different scenarios in the horizontal (area) 20 view as well as in the vertical (cross sectional) 20 view. The effects of groundwater pumping from Khalba well field, hydraulic conductivity and dispersivity are elaborated. Chapter 6 presents a summary, conclusions and recommendations of the study. A list of references that have been used in this study is also included.

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Page publiée le 21 avril 2017, mise à jour le 7 novembre 2017