Table 7.

Fitted parameters and goodness of fit indicators for the Logistic velocity profile model for both PVC90 and PVC63 treated pipes.

	Test	Re	K	u*	Vmax	R2	MAE		RMSE
							(m/s)	%	(m/s)	%
PVC90	1	1.27E+04	− 0.04	0.0	0.19	0.01	0.0140	9.26	0.0005	10.77
	2	1.95E+04	− 0.04	0.0	0.28	0.01	0.0101	4.34	0.0001	5.27
	3	2.13E+04	− 0.04	0.0	0.30	0.01	0.0152	6.00	0.0006	7.07
	4	2.77E+04	− 0.05	0.0	0.38	0.00	0.0083	2.52	0.0001	2.86
	5	3.28E+04	− 0.05	0.0	0.44	0.01	0.0104	2.67	0.0002	3.08
	6	3.88E+04	− 0.07	0.0	0.53	0.01	0.0131	2.84	0.0005	3.36
	7	4.40E+04	− 0.08	0.0	0.60	0.01	0.0160	3.05	0.0007	3.30
	8	4.86E+04	− 0.09	0.0	0.66	0.00	0.0088	1.51	0.0001	1.92
	9	5.36E+04	− 0.08	0.0	0.72	0.01	0.0104	1.63	0.0000	1.97
	10	6.40E+04	− 0.12	0.0	0.88	0.01	0.0192	2.52	0.0008	2.87
	11	7.48E+04	− 0.12	0.0	1.00	0.01	0.0097	1.08	0.0000	1.45
	12	8.32E+04	− 0.13	0.1	1.12	0.01	0.0185	1.87	0.0009	2.26
PVC63	1	1.11E+04	− 0.07	0.03	0.26	0.70	0.0318	16.83	0.0000	20.35
	2	1.41E+04	− 0.07	0.03	0.31	0.92	0.0132	5.53	0.0002	6.65
	3	2.13E+04	− 0.05	0.02	0.41	0.96	0.0081	2.22	0.0000	2.40
	4	2.74E+04	− 0.05	0.02	0.51	0.80	0.0169	3.64	0.0003	4.16
	5	3.68E+04	− 0.07	0.03	0.69	0.83	0.0226	3.60	0.0005	4.00
	6	4.28E+04	− 0.06	0.02	0.78	0.76	0.0208	2.86	0.0006	3.60
	7	4.93E+04	− 0.08	0.03	0.91	0.89	0.0200	2.38	0.0003	2.78
	8	5.54E+04	− 0.11	0.05	1.05	0.94	0.0204	2.17	0.0003	2.32
	9	5.99E+04	− 0.13	0.05	1.14	0.98	0.0151	1.48	0.0002	1.57
	10	6.86E+04	− 0.16	0.06	1.31	1.00	0.0074	0.64	0.0000	0.73
	11	8.96E+04	− 0.22	0.09	1.72	0.99	0.0160	1.05	0.0001	0.79
	12	9.36E+04	− 0.22	0.09	1.79	0.98	0.0250	1.57	0.0000	1.33