Date of Award
Master of Science (MS)
Khalid Ahmad Al Bloushi
The United Arab Emirates (UAE) is considered within the arid climate zone having low rates of annual rainfall. The freshwater is mainly located in shallow groundwater aquifers. Understanding the depth and extent of such aquifers is an important issue for UAE local governments and environmental agencies. Hydrogeological conditions in the UAE are strongly related to the topographic features and are dominated by a mountain range in Oman at the eastern margin of the Arabian Platform. The alluvial plains such as Al-Jaww plain (eastern Al-Ain city) is considered as an important potential source of groundwater for the Al-Ain region. Al-Jaww plain is a large and flat area consisting of gravel and sand outwashes from the Al-Hajar mountains. The main objective of this research is to study the electrical resistivity distribution beneath the study area and locate groundwater aquifers. In this research study, the audio-magnetotelluric (AMT) method was applied and measurements from 10 AMT stations were recorded along with an east-west profile of 11 km length in Al-Jaww plain. The AMT method is an important high-resolution, non-seismic geophysical technique that measures variations in the Earth's natural electromagnetic fields to detect electrical resistivity variations in the subsurface at shallow to intermediate depths. A two-dimension resistivity inversion model was developed for the AMT data measured along the east-west profile using WingLink software. The model shows mainly three geo-electrical layers from surface to 5 km depth as follows: (1) a shallow layer with low resistivity (0-15 Ohm.m), representing groundwater aquifer zone from the ground surface to 1 km depth, (2) a moderate resistive layer (15-250 Ohm.m) beneath the first layer and (3) Hawasina Complex (>250 Ohm.m) beginning at 2.5 km and reaching 5 km. The results of this study will support local government and water agencies for future better management of ground water resources in Al-Ain.
ALAran, Ahmad Esam, "2D AUDIO MAGNETOTELLURIC (AMT) DATA INVERSION OF AL-JAWW PLAIN AREA (AL-AIN, UAE) FOR GROUNDWATER AQUIFER INVESTIGATIONS" (2020). Theses. 834.