Table 1. Calibration summary for the multidimensional flow model for the braided-straight reach of the Kootenai River near Bonners Ferry, Idaho, 2006.

[Streamflow for model calibration: A range of flows was selected from the 2005 and 2006 hydrograph with each flow representing the greatest duration of steady streamflow, less than a 5 percent change in flow within 24 hours. Streamflow is from the USGS Tribal hatchery gaging station 12310100. Computed water-surface elevation: water-surface elevations for five streamflows were obtained from two permanent and five temporary stage gaging stations in the model reach and water-surface elevations for three calibration flows were made by a synoptic water-surface elevation measurement. The model is constructed with a uniform drag coefficient. Simulated average depth and velocity, as well as computed lateral eddy viscosity, are based on the population of all wet nodes in the model. Abbreviations: ft, foot; ft³/s, cubic foot per second; ft/s, foot per second; m³/s, cubic meter per second; m, meter; m²/s, meter squared per second; m/s, meter per second; GPS, Global Positioning System; RMS, root mean square; USGS, U.S. Geological Survey]

Date	Time	Streamflow for model calibration		Computed water-surface slope	Computed water-surface elevation at model boundaries					Average measured stage minus average simulated stage at seven gaging stations along the model reach (m)
					Downstream			Upstream
		m3/s	ft3/s		(m)	(ft)		(m)	(ft)
103-01-06	01:00 PM	196	6,930	0.0005	532.80	1,748.04		537.55	1,763.62	0.003
204-26-06	11:00 AM	380	13,400	.0005	533.71	1,751.02		538.52	1,766.81	.002
107-20-06	03:45 PM	511	19,600	.0005	535.00	1,755.53		539.00	1,768.37	-.018
106-28-06	02:15 PM	813	29,300	.0004	536.16	1,759.06		539.85	1,771.16	.007
205-30-06	11:00 PM	983	34,700	.0003	537.45	1,763.29		540.00	1,771.65	.003
205-22-06	11:00 AM	1,310	46,300	.0002	538.34	1,766.22		540.66	1,773.82	.012
206-21-06	02:00 PM	1,630	57,500	.0002	539.17	1,768.94		540.80	1,774.29	.009
206-18-06	02:00 PM	1,760	62,100	.0002	539.46	1,769.89		541.60	1,776.91	.008

Date	Time	RMS error calculated for measured and simulated stage	Model drag coefficient(dimensionless)	Lateral eddy viscosity (m2/s)			Simulated average river depth			Simulated average streamflow velocity
				Model	Computed		(m)	(ft)		(m/s)	(ft/s)
103-01-06	01:00 PM	0.089	0.0024	0.014	0.014		2.3	7.5		0.610	2.01
204-26-06	11:00 AM	.111	.0024	.019	.019		2.4	7.8		.780	2.57
107-20-06	03:45 PM	.002	.0024	.025	.025		2.6	8.7		.940	3.07
106-28-06	02:15 PM	.114	.0025	.032	.032		3.3	10.8		.950	3.13
205-30-06	11:00 PM	.049	.0029	.034	.034		3.9	12.8		.870	2.84
205-22-06	11:00 AM	.034	.0029	.042	.042		4.5	14.8		.938	3.08
206-21-06	02:00 PM	.037	.0030	.049	.049		5.2	17.0		.936	3.07
206-18-06	02:00 PM	.034	.0032	.051	.051		5.4	17.9		.943	3.09

¹ Synoptic water-surface elevation measured by survey-grade global positioning system.

² Synoptic water-surface elevation measured at seven gaging stations.