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<br />The hourly water demands measured at the chlorination station on June 20, 1994 are shown in <br />Figure 3. This usage pattern is typical of most water systems and shows a distinct peak usage at <br />18:00 hours and a smaller peak in the morning. The minimum-use period occurs between 11:00 <br />PM (23:00 hours) and 2:00 AM. <br /> <br />The hourly usage is converted to a ratio between the instantaneous use and the average use over <br />24 hours as shown in Figure 4. As shown, the peak rate of use is 1.5 times the average for the <br />day. This is exactly the figure used for typical system. Also shown is a generic usage pattern as <br />published by the A WW A From this graph, it is apparent that the Lamar usage pattern closely <br />follows the typical patterns. The ratios developed from this chart are used in the computer model <br />as the basis for the extended period simulation. <br /> <br /> 1,6 <br /> 1.4 <br />0 1,2 <br />~ <br />a: <br />~ <br />0 <br />x 0,8 <br />. <br />:;; <br />.8 0,6 <br />~ <br />0 <br />u: 0.4 <br /> 0,2 <br /> 0 <br /> <br />Water Demand Ratio <br /> <br />nnn _nnn ,,_unnnn_ nnn _nnn nnn_ nnn ,,_unnnn_ ,,_unnnn_ nnn _nnn _nnn _un , ,,_unnnn_ ,,_unnnn_ _nnn nnn _nnn <br /> .... ... <br /> <... <br /> '* "\ ....... <br /> -- ..... .r \ \ <br /> ~ 7 <br /> ~ "\ \, <br />" ".. ... j <br /> "\.. .,/ \ <br />It' ,If' 1'11.... ~ ~ .... <br /> --+-- Water Demand <br /> Ratios AWWA <br /> _Water Demand <br /> Ratios Lamar <br /> I I <br /> <br />o 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 <br /> <br />Hour <br /> <br />Figure 4 <br /> <br />(~ <br />