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).
Dept. of Mines and Energy
Report ; 68/1985
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Technical Report WRD85068 Viewed at 15:07:30 on 29/07/2010 Page 18 of 58. I I I I I I I I I I I I I I I I I I I I The peak consumption day occurred late on 26th August, 1984 when it would be reasonable to assume that the college was at its peak population of 200 students and the caravan park would have been full. Therefore, the town's total population would have been approximately 730 at- the time. From a study of wate~ mete~ readings for the town, average consumptions of 2712 litres per day per household and 136000 1itres per day for the college were established. Assuming an occupancy rate of 3.67 persons per household, average daily consumption is 737 litres per capita, whereas college consumption is 680 litres per capita. Hence, the ratio of resident to transient consumption is 1.08 : 1. Taking the peak day consumption of 2.2 ML and subtracting twice the average daily consumptions for the areas of the town marked with * in Appendix C (to approximate the peak day consumption of residents and transients only), a peak day consumption value of 1.7 ML is indicated for the combined resident and transient popUlation consumptions. Using the consumption ratio of 1.08 : 1 for residential to transient popUlations, then peak day, per capita consumptions of 2384 L/c.d and 2207 L/c.d are indicated for the resident and transient popUlations respectively. At this stage the percentage of the various lot areas for the college, caravan park and motel which will be ultimatly irrigated is unknown. It is considered appropriate at this stage to project the current per capita consumption for the college to cover the future college and tourist developments. 7.6 Average Day (Wet Season) : The average day consumption during the wet season can be calculated by averaging the recorded production values for the period October to April. This gives the average day consumption in the wet season as approximat-ely 0.15 !1L. 7.7 Unaccounted I~ater : For any given wate~ supply system discrepencies will occur between the volume of water produced and the metered consumption. This can be can attributed to a number of loss components within the system, such as drainage of tank for maintainance, testing of pumps, scouring of lines, fire hydrant tests, and leakage within the system. The total yearly production for Batchelor approximates 320 ML, with the metered yearly consumtion at 280 ML, thus giving a value of aproximately 12.5 % of the yearly production as unaccounted water for the system. A portion greater than 20 % would be considered unacceptable. 14