Origin, Anthropogenic and Climate Influences on the Occurrences of Saline Groundwater at the City of Cairo, Egypt Deduced by Chemical Parameters of Water Composition
Werner Balderer1, Fanny Leuenberger2
1ETH Zurich, Earth Sciences, Swiss Geotechnical Commission, Switzerland
In the 16th to 18th century canals and ponds outgoing from the Nile were systematically built in the growing city Cairo, for irrigation purposes and as transport ways for ships. This network of canals and ponds was able to store temporarily the incoming flood water and in this way prevent the general flooding of Cairo City. After the construction of the Aswan High dam in the 20th century (1970) these canals were not needed anymore for irrigation and as storage capacity of the flood water. Most of the canals and ponds were filled up and used for road network extensions. However the ponds of Ain Al Sira, Khayalat Al Shorta and Abo El Soud which were now no longer connected to a canal system showed the following behaviour: As these ponds were filled up with dumping materials and one of them removed even completely from the landscape (Abo El Soud), the water was invading the basements of the constructed buildings as well as outflowing in other places. The water surface rise of the two remaining ponds is still continuing and is actually even flooding nearby roads and cemeteries.
Keywords: Cairo ponds, origin and chemical composition of waters, remediation of groundwater level, water logging
Contact Address: Werner Balderer, ETH Zurich, Earth Sciences, Swiss Geotechnical Commission, Sonneggstrasse 5, 8092 Zurich, Switzerland, e-mail: balderererdw.ethz.ch