By Don D. Ratnayaka, Malcolm J. Brandt
This re-creation of a vintage textual content has been considerably increased to hide the most up-tp-date matters and foreign criteria are tested in-depth, with specific assurance of WHO, ecu, united kingdom and US criteria, corporations and perform. Written with the postgraduate water engineer in brain, this article will even be crucial studying for undergraduates learning water engineering. complete assurance of all points of public water offer and remedy for a world marketplace * contains extra assurance people, eu and WHO criteria and perform * COVERS very important present themes corresponding to EIA and cryptosporidium outbreaks
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18 Effect of price on water demand When water is sold by meter the theoretical price-demand relationship applying is: Q = kp e where Q is the demand at price P per unit of consumption, k is a constant for the particular units used and e is the coefficient which measures the 'elasticity' of the demand. Since price increases will tend to cause a reduction in the demand, Q is proportional to the inverse of P, hence e is negative. e. changes of P cause almost proportional changes in Q. g. 2 a 29% price increase of P would only cause Q to decrease by 5%.
B) Thackray J. E. and Archibald G. , The Severn-Trent Studies of Industrial Use. Proc. ICE, August 1981. (c) Binnie & Partners. Survey of Water Use in Riyadh Factories, 1977. (d) Schutte C. F. and Pretorious W. A. Water Demand and Population Growth, Water South Africa, 1997, pp. 127-133. , The Industrial Demand for Water in SE England. Weidenfeld, London, 1969. (f) Whitman W. E. and Holdsworth S. D. Water Use in the Food Industry. Leatherhead Food Research Association, 1975. (g) Van der Leeden F.
The Accuracy of Small Revenue Meters, Report TR 221, WRc, 1984. 17. Hall M. Technological Developments in Metering, IWEM Symposium 'Paying for Water', Jan 1992. JIWEM, Aug. 1992, p. 517. 18. Smith A. The Reduction of Leakage Following Water Metering on the Isle of Wight, IWEM Symposium 'Paying for Water', Jan. 1992. JIWEM, Aug. 1992, p. 516. 19. Scott J. W. Private communication, Jan 1991. 20. WRc, Waste Control and Leak Detection in Water Distribution Systems, WRc regional meeting, Autumn 1978.
Water Supply by Don D. Ratnayaka, Malcolm J. Brandt