5.2.5.2 Other Diurnal Curve Adjustments

Some of the diurnal flow patterns for the calibrated model were refined slightly. Following the adjustments to the residential diurnal curve, adjustments were made to diurnal curve assignments. When the model was first run, the diurnal curve for commercial flows was assigned to the flows generated in the southwest corner of the City that flow down the 9000 South trunk line to the 9000 South meter. While the curve from the model flows peaked around the same time as the curve from the meter flow data, the shape of the two curves did not agree with one another. Following discussion with the City, the diurnal curve for this area of the City was changed from commercial to light industrial. Changing the assigned diurnal curve to the light industrial curve led to the shape of the model flow curve more closely matching the flow curve from the meter data.

The peaking factor is defined as the daily peak flow divided by the daily average flow. Table 5-2 and Figure 5.1 show the hourly flow patterns that are multiplied by the average demand to create hourly and peak flow values, correlating with actual metered flow data.

Table 5-2:
Model Hourly Flow Patterns Multiplied by the Average Demand

Hour	Model Residential Pattern	Model Commercial Pattern	Model Industrial Pattern	Model Light Industrial Pattern
1	0.60	0.81	0.50	0.90
2	0.55	0.54	0.50	0.90
3	0.55	0.05	0.50	0.90
4	0.55	0.04	0.60	0.90
5	0.55	0.04	0.60	0.90
6	0.55	0.04	0.70	0.90
7	0.85	0.04	1.10	0.90
8	1.25	0.04	1.25	1.20
9	1.45	0.05	1.30	1.20
10	1.55	0.81	1.30	1.20
11	1.45	1.34	1.40	1.20
12	1.40	1.77	1.60	1.20
13	1.30	1.61	1.70	1.20
14	1.25	1.72	1.70	1.20
15	1.20	1.72	1.50	1.20
16	1.15	1.45	1.30	0.90
17	1.15	1.24	1.20	0.90
18	1.10	1.61	1.10	0.90
19	1.10	1.88	1.00	0.90
20	1.05	1.61	0.80	0.90
21	1.00	1.61	0.70	0.90
22	1.00	1.45	0.60	0.90
23	0.85	1.72	0.50	0.90
24	0.55	0.81	0.50	0.90