U.S. Geological Survey Scientific Investigations Report 2005

Use of Sediment Rating Curves and Optical Backscatter Data to Characterize Sediment Transport in the Upper Yuba River Watershed, California, 2001–03

By Jennifer A. Curtis¹, Lorraine E. Flint¹, Charles N. Alpers¹, Scott A. Wright² and Noah P. Snyder³

U.S. Geological Survey Scientific Investigations Report 2005–5246 , published 2006.

Table 4

Regression equation form and statistics for gaging stations in the Middle Yuba and South Yuba Rivers in the upper Yuba River watershed, California.

[Note: Regression variables, which include suspended-sediment concentration and streamflow, were converted to base-10 logarithms. r², coefficient of determination. a is the Y intercept and b is the regression coefficient in equation 1. N, number of data points: Data points were used to determine group-averaged dataset; group-averaged data points were used in the regression analysis]

Middle Yuba River (MYG, Station ID 11410000)
	a	b	r²	Standard error	P value	F statistic	Critical F statistic	⁶N	⁷N (group-averaged)
Average¹	−1.776	1.278	0.95	0.165	0.000	326	1.4	675	19
Summer/fall²	−0.602	0.516	0.28	0.125	0.050	5	1.5	135	14
First flush³	−4.377	2.987	0.60	0.423	0.001	18	1.5	154	14
Winter⁴	−1.838	1.317	0.91	0.207	0.000	178	1.4	371	19
Spring snowmelt⁵	−0.736	0.602	0.65	0.145	0.008	13	1.6	174	9

South Yuba River (SYG, Station ID 11417500)
Average¹	−2.066	1.221	0.87	0.310	0.000	120	1.4	698	20
Summer/fall²	−1.548	1.024	0.57	0.209	0.002	16	1.5	127	14
First flush³	−3.127	1.945	0.79	0.383	0.000	40	1.5	145	12
Winter⁴	−2.750	1.460	0.91	0.273	0.000	184	1.4	380	20
Spring snowmelt⁵	−0.798	0.538	0.67	0.186	0.007	20	1.6	165	9

¹Used all data except outliers. ²Used all data collected from June through November except outliers and first flush event data. ³Used all data collected from June through November except outliers. ⁴Used all data collected from December through March except outliers. ⁵Used all data collected from April through May except outliers. ⁶Number of data points used to determine group-averaged dataset. ⁷Number of group-averaged data points used in regression analysis.