Web11 apr. 2012 · 3. Design of Sewers The hydraulic design of sewers and drains, means finding out their sections and gradients, is generally carried out on the same lines as that of the water supply pipes. However, there are two major differences between characteristics of flows in sewers and water supply pipes. WebThe Al-Kafara dam is the oldest known such a dam, constructed during the Third or Fourth Dynasties of Pharaohs (between 2686 and 2498 B.C.). Its location was 30 km south of the current Cairo, between “Wadi Al-Hof” and “Wadi Al-Garawi”. The dam capacity plan is believed to be 600,000 m 3 of water.
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