by Nevine El-Aref , Saturday 26 May 2012
This week, Giza Inspectorate operated 18 water pump machines to pump out subterranean water that has accumulated under the Sphinx.
The machines are distributed over the Giza plateau according to a map showing the areas where the subterranean water has accumulated.
Mohamed Ibrahim Minister of State for Antiquities said that the machines will pump out 1100 cubic metres of water every hour, based on studies carried out previously by reputed Egyptian and American experts in subterranean water and ground mechanic and equilibrium factors.
He explains that the reasons behind the increase subterranean water-rates is because of the new drainage system installed in the neighbouring area of Nazlet Al-Seman.
Mohamed El-Sheikha, head of Projects Section at the Ministry of State for Antiquities (MSA) said that the project is carried out in collaboration with USAID (US Agency for International Development), which also supported similar projects at Karnak and Luxor temples in Luxor eight years ago.
Pumping work will start in the area of King Khafre’s Valley Temple and the area surrounding the southern hill.
El-Sheikha explains that according to ecological and geophysical studies, the Sphinx and its bedrock are safe.
He told Ahram Online that the level of water under the ground level is 4.6 metres, similar to the level in ancient time. Such a level, El-Sheikha pointed out, is natural since one of the Nile branches had once reached the plateau when a harbour was dug to shelter boats transporting required blocks from quarries in Aswan and Tura in Helwan for the construction of the pyramids.
Vacuum station are studied separately. As Vacuum Sewer is operating with vacuum, the lift in every separate pipe line must be calculated. Also the pipe length must be considered. As mentioned earlier, the Vacuum Sewer method utilizes the atmospheric pressure for the sewage disposal. The vacuum station is normally operating at a vacuum level of 60-65 kPa. The vacuum level in the interface unit at the discharge valve shall never be less than 25 kPa and the lift in the interface unit shall normally not be higher than 1.5 m. As a general rule the loss of vacuum between the station and to any interface unit shall not be higher than 3.5 m. for more……www.quavac.com
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