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Batchelor water supply development study 1985.



Batchelor water supply development study 1985.


Keith Lane & Associated Pty Ltd


E-Publications; E-Books; PublicationNT; Report ; 68/1985




Made available via the Publications (Legal Deposit) Act 2004 (NT).





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Dept. of Mines and Energy

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Report ; 68/1985

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Technical Report WRD85068 Viewed at 15:07:30 on 29/07/2010 Page 19 of 58. I I I I I I I I I I I I I I I I I I I I NODE = PEAK HOURLY DEMAND 8.0 NETWORK ~N~LYSIS 8.1 Method of Analysis The water supply system was analysed with the aid of Water Division's 24 hour hydralic network analysis program. The program uses the Hardy Cross method of analysis on a simplified model of the system, which accounts for the major reticulation lines and applies demands at their points of intersection (nodes). The analysis outputs the available head at all nodes and head losses in pipes, thus enabling inefficient sections of pipework to be identified. The peak hourly flows for the various areas in the Town were analysed using the following formula : NODE ANNUAL CONSUHPTION x Peak Day Consumption x Average Hour Peak Day (Lid) x Peak Hour Peak Day l'.NNUAL TOTAL x 3600 x 24 CONSUMPTION where : taking reI event August C. the node consumption was determined by the metered consumption records for each area of the town for the year August '83 to '84 and is explained in more detail in Appendix the peak day consumption value was taken as the maximum recorded daily consumption of 2.2 ML. the annual consumption was taken as the sum of the metered consumption of the various areas of the town. the peak/average flow ratio of 1.44 was determined by the methods described in AppendiK D. substituting these values in the formula gives: NODE NODE ANNUAL 6 PEAK HOURLY = DEMAND CONSUMPTION x 2.2 x 10 x 1.44 6 279 x 10 x 3600 x 24 From this, the node peak hourly demand can be obtained by entering the metered node annual consumption. The system was analysed for a number of cases for 1985 and 2000 populations firstly to assess the present condition of the system, and secondly to find the optimum solution to the upgrading of the system for the year 2000. To calculate per capita population. demand demand flows for the was applied Batchelor's development 15 year 2000, current to the projected plan, as prepared