Table 3. Calibration summary for the multidimensional flow model for the meander-straight reach, Kootenai River near Bonners Ferry, Idaho.

Streamflow for river model simulation: The model is constructed with a variable drag coefficient for the 170, 566, and 1,130 m³/s streamflow management scenarios. A drag coefficient is specified for the reach between the upstream boundary of the model and Ambush Rock and a different drag coefficient is specified for the reach between Ambush Rock and the downstream boundary of the model. Computed water-surface elevations: Water-surface elevations for objective calibration flows correspond to median water-surface elevations at the Queens Bay gaging station in Kootenay Lake, British Columbia, Canada, and were computed using a 1-dimensional flow model (Berenbrock, 2005). Reported average river depth and streamflow velocity values are based on the population of all wet nodes in the model. Abbreviations: m³/s, cubic meter per second; ft³/s, cubic foot per second; m, meter; ft, foot; m²/s, meter squared per second; m/s, meter per second; ft/s, foot per second; RMS, root mean square]

Streamflow for river model simulation		Computed surface-water slope	Computed water-surface elevation at model boundaries					Computed average stage minus simulated average stage at thirty seven stations along the model reach (m)	RMS error for measured and simulated stage at thirty seven stations along the model reach
			Downstream			Upstream
(m3/s)	(ft3/s)		(m)	(ft)		(m)	(ft)
170	6,000	0.00003	532.62	1,747.54		533.25	1,749.59	0.01	0.018
283	10,000	.00002	533.29	1,749.72		533.82	1,751.47	.01	.013
566	20,000	.00008	534.20	1,752.72		535.02	1,755.40	.02	.019
850	30,000	.00004	535.16	1,755.86		536.10	1,758.96	.01	.025
1,130	40,000	.00010	536.03	1,758.72		536.96	1,761.77	.01	.023
1,420	50,000	.00004	536.88	1,761.51		537.89	1,764.81	.00	.020
1,700	60,000	.00005	537.79	1,764.50		538.90	1,768.14	.00	.024
1,980	70,000	.00005	538.74	1,767.60		539.93	1,771.51	.00	.023
2,120	75,000	.00005	539.22	1,769.20		540.44	1,773.20	.00	.023

Streamflow for river model simulation			Model drag coefficient, dimensionless				Lateral eddy viscosity (m2/s)			Simulated average river depth			Simulated average streamflow velocity
m3/s	ft3/s		River kilometer 228.4 to 245.8 (meander-straight reach)	River kilometer 228.4 to 244.5 (meander reach)	River kilometer 244.5 to 245.8 (straight reach)		Model	Computed		(m)	(ft)		(m/s)	(ft/s)
170	6,000		–	0.0056	0.0131		0.011	0.011		4.6	15.1		0.24	0.8
283	10,000		–	.0040	.0073		.017	.017		5.0	16.4		.34	1.1
566	20,000		–	.0033	.0057		.030	.030		5.8	19.0		.52	1.7
850	30,000		–	.0026	.0041		.044	.044		6.6	21.7		.66	2.2
1,130	40,000		–	.0017	.0030		.055	.055		7.3	24.0		.76	2.5
1,420	50,000		0.0015	–	–		.066	.066		7.9	25.9		.84	2.8
1,700	60,000		0.0016	–	–		.079	.079		8.8	28.9		.90	3.0
1,980	70,000		.0019	–	–		.089	.089		9.5	31.2		.94	3.1
2,120	75,000		.0020	–	–		.095	.095		9.9	32.5		.97	3.2