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

Table 2. Aerial photographs and orthophotographs used in the sediment transport study, Chetco River, Oregon.

[Abbreviations: FPkm, flood-plain kilometer; NAIP, National Agriculture Imagery Program; USACE, U.S. Army Corps of Engineers; USFS, U.S. Forest Service; USDA, U.S. Department of Agriculture; USGS, U.S. Geological Survey; m³/s, cubic meter per second; m, meter]

Year	Original format	Coverage	Flight date	Approximate discharge at photograph date (m³/s)	Photo scale or orthophotograph resolution	Original  source	Rectification source
1939	Aerial photograph	FPkm 0–13	05-27-1939	¹11	1:10,200	USACE	This study
1943	Aerial photograph	FPkm 0–16	08-03 to 8-04-1943	¹5	1:40,000	USFS	This study
1962	Aerial photograph	FPkm 0–16	07-18-1962 for FPkm 0–4.5; 06-07-1962 for FPkm 4.5–16	¹4 (FPkm 0–4.5) ¹11 (FPkm 4.5–16),	1:8,800	South Coast Lumber Co.	This study
1965	Aerial photograph	FPkm 0–16	06-22-1965	¹7	1:20,000	USDA	This study
1995	Orthophotograph	FPkm 0–16	05-27-1995	15	1 pixel = 1 m	USGS	USGS
2000	Orthophotograph	FPkm 0–16	07-27 to 08-14-2000	3–4	1 pixel = 1 m	USGS	USGS
2005	Orthophotograph	FPkm 0–16	07-17-2005	9	1 pixel = 1 m	NAIP	NAIP

¹ Indicates estimated discharge, calculated by extending the Chetco River USGS gaging station data based on data from the Smith River USGS gaging station.