USGS Scientific Investigations Report 2010–5065Channel Change and Bed-Material Transport in the Lower Chetco River, Oregon

Table 5. Summary of bedload measurements for winter 2008–09, Chetco River, Oregon.

[Measurements at U.S. Geological Survey streamflow-gaging station 14400000 with TR-2 sampler; using modified version of single equal-width-increment method of Edwards and Glysson (1999). Abbreviations: kg, kilogram; mm, millimeter; m³/s, cubic meter per second, m, meter; kg/s, kilogram per second]

Sample  transect  (date and  start time)	Number of verticals	Sample  mass  (kg)	Median particle size  (mm)	Water discharge (m³/s)	Channel  width  (m)	Bedload discharge (kg/s)	Comments
12-28-08 at 1100	10	102.4	31	1,190	70	78.4	Poor sampler contact with channel bed for some verticals.
12-28-08 at 1400	10	193.9	13	1,120	70	148.4	Good sampler contact with channel bed for most verticals.
02-24-09 at 1123	9	21.6	.8	290	60	15.7	Sampler support cable failed at vertical 8; calculation assumes no material for verticals 8 and 9, so this should be considered a minimum value.