Direct current (DC) resistivity survey to demonstrate the regional geological and hydrogeological conditions at the New Administration Capital Airport
July 01, 2016

Nowadays, urbanization and development are becoming so rapid. Further, the construction activities with economic development have been increased. The present report provides the results of DC resistivity survey conducted to demonstrate the regional geological and hydrogeological setting at the New administration Capital airport. The study area is located to the east of Cairo and along the Cairo-Suez desert road (Fig. 1).  In general the study area is located at the northeastern part of Egypt, i.e. Cairo-Suez District. This district extends eastwards from the eastern part of Cairo to the northern end of the Gulf of Suez rift. Geologically, the area of study is covered mainly by sands and gravels. The gravels are mostly of pebble size and are made up of banded flint usually blanked by exposure to weathering. The sand and gravel are usually loose or poorly cemented, but in several places, especially in fractured blocks, uprising silica and iron-bearing solutions caused the formation of hard iron-stained quartzite. The study aims to evaluate the groundwater occurrence at the New administration capital Airport using geophysical technique.

Results:

Ø    DC resistivity soundings (1D) were conducted at the New administration Capital airport. The data were processed and interpreted in the form of seven geoelectrical layers.

Ø    Hydrogeophysically, the expected main groundwater aquifer in the study area is deep (> 240 m depth) in the form of connate water within the marine sediments (limestone with shale intercaltion). Accordingly, the groundwater is saline (about 3000 ppm).

Ø    Hydrogeophyically, a low resistivity layer (3 ohm-m) at about 764 was recorded, which can be interpreted as very high salinity aquifer (> 6000 ppm) of fractured limestone with shale intercalations. Accordingly,

Regarding to such results, it is recommended to withdraw the groundwater from the upper part of the main groundwater aquifer (i.e. 240 m) considering the shale intercalation with designing the well. In general, the discharge of saltwater from the desalinization station can be carried out in deeper part of such aquifer.

The interpreted resistivity layers of the measured DC sounding in the form of geological layer.

Division : Geological applications and Mineral Resources

Co-Prof : Mohammed El Bastawesy
  • Share This: