Throttling and Booster Pumps Control of Al-KarkhWater Scheme

A. Al-Sai, Aied; Idi,; K. El-Jumaily, Karim

	Throttling and Booster Pumps Control of Al-KarkhWater Scheme
Journal of Engineering and Sustainable Development
Article 1, Volume 10, Issue 2, 2006, Pages 123-138
Authors
Aied A. Al-Sai; ; Karim K. El-Jumaily
Abstract
The Karkh water project has been constructed and put in operation in 1986, in order to supply drinking water to the Karkh district on the right side of Baghdad. Due to deficit in water in the Rusafa side the Baghdad Water Supply Administration (BWSA) has suggested a reasonable solution in which about (455000 m3/day) of water was to be transferred from Karkh to Rusafa water services. The transfer process, controlled by throttling two valves on the North reservoir in the Karkh service system. The throttling process, however, worked randomly creating many hydraulically problems. Therefore, it becomes very essential to suggest a proper solution so that a fair distribution could be achieved. Two solutions have been employed the first is by operating partial throttling of the terminal discharge valve at north reservoir (TDV). The second solution, which is the safest, is to use boosting pumps to transfer 455 MLD to Al-Rusafa side so as to reserve the right amount of water to all reservoirs.In finding the best locations of boosting pumps the technique of contour line has been used, the optimal locations and the characteristic curves of the pumps have been discussed.The research is expanded to include how to protect the pumps against damage thatcould be created by back flow and hammering.A computer program has been developed in Quick Basic language to analysis the best throttling percentages. The Lagrange polynomial method has been implemented to find the medium values of combination between throttling percentage and field measurement of pressures.

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