USGS Scientific Investigations Report 2009–5228Sediment Characteristics and Transport in the Kootenai River White Sturgeon Critical Habitat near Bonners Ferry, Idaho

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Scientific Investigations Report 2009–5228

Sediment Characteristics and Transport in the Kootenai River White Sturgeon Critical Habitat near Bonners Ferry, Idaho

Table 2. Particle-size distribution and classification.

[Adapted from Berenbrock, 2005. Φ , phi scale where Φ = -log₂(diameter in mm); <, less than]

Diameter of particle		Classification name	Sample type
Phi scale Φ	Sieve size (millimeter)	Classification name	Sample type
-8	256		Bedload sediment
	180	Coarse cobble
-7	128
	90	Fine cobble
-6	64
	45	Very coarse gravel
-5	32
	22.6	Coarse gravel
-4	16
	11.3	Medium gravel
-3	8
	5.6	Fine gravel
-2	4
	2.7	Very fine gravel
-1	2
	1.4	Very coarse sand
0	1			Suspended sediment
	0.7	Coarse sand
1	.5
	.355	Medium sand
2	.250
	.180	Fine sand
3	.125
	.090	Very fine sand
4	.063
	<.063	Silt

Report PDF (1.85 MB)

For additional information contact:
Director, Idaho Water Science Center
U.S. Geological Survey
230 Collins Road
Boise, Idaho 83702
http://id.water.usgs.gov

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