Table 2.

Design characteristics of sampled trunk sewers and interceptors and results of in-sewer travel time calculations.

Sewershed	Diameter (mm)	Average slope (m.m−1)	Average flow rate (L.s−1)	Length (m)	Flow velocity (m.s−1)	In-sewer travel time (h)
OWS-1	1500	0.0059	512.83	4000	1.9	0.58
OWS-2	400	0.0053	16.06	1500	0.8	0.53
OWS-3	1200	0.0433	236.15	6000	3.1	0.54
OWS-4	400	0.0117	86.82	4000	1.6	0.68
OWS-5	600	0.0050	124.52	6200	1.3	1.31
OWS-6	1000	0.0050	298.06	8200	1.6	1.44
OWS-7	300	0.0278	12.40	1000	1.3	0.21
OWS-8	500	0.0137	82.28	4500	1.7	0.75
AWS-1	700	0.0090	127.44	5400	1.6	0.94
AWS-2	600	0.0475	75.29	2000	2.6	0.22
AWS-3	800	0.0193	168.31	7500	2.2	0.95
AWS-4	1500	0.0038	460.68	16200	1.6	2.81
AWS-5	500	0.0375	71.05	4000	2.4	0.47
AWS-6	1600	0.0281	116.52	4000	2.4	0.47
AWS-7	400	0.0094	16.20	2700	1.0	0.77
STP-A	1600	0.0050	1904.00	28400	2.5	3.11
STP-O	1600	0.0050	1691.00	27200	2.5	3.02