Abstract
In this study, Ten Time Domain Electromagnetic (TDEM) measuring points have been conducted at four pre-selected sites along Wadi Deir Al-Kahaf in order to investigate the potential of the near subsurface deposits and aquifer for groundwater artificial recharge applications. The surveyed results suggest well resolved geological layers such as alluvial mudflat, basalt layers and their saturation states. In addition a hydrogeophysical cross section along the studied sites was constructed which permits to locate the lateral variations in rock properties due to water saturation and or facies changes. The saturated thickness of the Upper Aquifer System in the study area was found to be changed from 5 m near TEM 1 to about 120 m near TEM 4 in thickness. The Abed Basalt Aquifer (AOB) has an average saturation thickness of about ~60 m, and forming the main aquifer (~100 m thickness) near surface to the north of the study area. TEM-3 and TEM-4 sites were found to be potential sites for groundwater artificial recharge based on the constructed hydro-geophysical model. This study recommends implementing detailed geophysical investigations particularly in the most northern parts of the study area.
Highlights
How to cite this paper: Al-Amoush, H., et al (2015) Geophysical Investigation Using Time Domain Electromagnetic Method (TDEM) at Wadi Deir Al-Kahaf Area/Jordan for Groundwater Artificial Recharge Purposes
The Time domain electromagnetic method was used in order to achieve the following objectives: (a) to investigate the subsurface deposits in terms of their types, thicknesses and layering sequences as well as their lateral and vertical extensions; (b) to create a 2D hydro-geophysical model along the study area to investigate the potential of subsurface deposits for groundwater artificial recharge
The TEM results suggest well resolved geological layers such as Aluvium mud flat (Alm), Abed Olivine Basalt (AOB), and a mixture of rocks at near surface of the main investigated areas (Figure 5)
Summary
The study area is located in the northeastern part of Jordan (Figure 1) within the following coordinates [325,000 329,000] E, [147,000 - 152,000] N according to Palestine Grid coordinate system. Elevation is ranging from 500 masl in the most southern part at Al-Azraq Al-shamali town to 640 masl in the most northeastern part of the study area. The area is classified as an arid to semi-arid area. The annual rainfall is low and reaches at maximum to 120 mm in the northern part and decrease gradually to south [13]
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