Table 4. Sensitivity analysis and results of the multidimensional flow model for simulated streamflows in the meander-straight reach, Kootenai River near Bonners Ferry, Idaho.

[Streamflow for river model simulation: The model was constructed with a variable drag coefficient for the 170, 566, and 1,130 m³/s streamflow-management scenarios. Drag coefficient: Shading indicates a drag coefficient (dark shading) specified for the reach between the upstream boundary of the model and Ambush Rock and a different dragcoefficient (light shading) specified for the reach between Ambush Rock and the downstream boundary of the model. No shading indicates a single drag coefficient. Sensitivity analyses of the calibrated drag coefficient were made for the 170, 1,130, and 2.120 m³/s streamflow-management scenarios at 85 (bold, italic) and 115 (bold) percent of the drag coefficient value. Reported median and maximum 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; Med., median; Max., maximum; m/s, meter per second; ft/s, foot per second; –, no data]

Streamflow for river model simulation		Drag coefficient	Depth						Velocity						Water-surface elevation
			(m)			(ft)			(m/s)			(ft/s)			(m)			(ft)
m3/s	ft3/s		Med.	Max.		Med.	Max.		Med.	Max.		Med.	Max.		Med.	Max.		Med.	Max.
170	6,000	0.0131	4.43	21.89		14.53	71.83		0.25	1.30		0.81	4.27		532.73	533.51		1,747.80	1,750.36
		.0056	–	–		–	–		–	–		–	.00		–	–		–	–
		.0111	4.42	21.89		14.51	71.82		.25	1.31		.82	4.31		532.72	533.61		1,747.77	1,750.69
		.0048	–	–		–	–		–	–		–	–		–	–		–	–
		.0151	4.44	21.90		14.56	71.84		.25	1.20		.81	3.92		532.74	533.49		1,747.83	1,750.30
		.0064	–	–		–	–		–	–		.00	.00		–	–		–	–
566	20,000	.0057	5.86	23.53		19.23	77.19		.58	1.31		1.89	4.30		534.54	535.04		1,753.74	1,755.38
		.0033	–	–		–	–		–	–		–	.00		–	–		–	–
1,130	40,000	.0030	7.51	25.37		24.63	83.22		.85	1.61		2.78	5.30		536.48	536.95		1,760.10	1,761.65
		.0017	–	–		–	–		–	–		–	–		–	–		–	–
		.0026	7.48	25.36		24.53	83.21		.85	1.65		2.79	5.41		536.45	536.94		1,760.01	1,761.61
		.0014	–	–		–	–		–	–		–	–		–	–		–	–
		.0035	7.54	25.39		24.74	83.28		.83	1.58		.28	5.19		536.51	537.07		1,760.20	1,762.04
		.0020	–	–		–	–		–	–		–	–		–	–		–	–
1,700	60,000	.0016	9.09	27.14		29.82	89.04		1.00	1.80		3.28	5.90		538.31	538.91		1,766.11	1,768.08
2,120	75,000	.0020	9.78	28.59		32.10	93.81		1.00	1.70		3.27	5.57		539.75	540.52		1,770.83	1,773.36
		.0017	9.77	28.59		2.54	93.81		1.00	1.77		3.28	5.81		539.72	540.45		1,770.73	1,773.13
		.0023	9.80	28.61		32.15	93.86		.99	1.65		3.26	5.41		539.78	547.59		1,770.93	1,796.56