USGS Scientific Investigations Report 2011–5041 - Channel Change and Bed-Material Transport in the Umpqua River Basin, Oregon

Table 1. U.S. Geological Survey streamflow-gaging stations used in this study.

[Recurrence interval flood magnitude calculated using Bulletin 17B guidelines (U.S. Water Resources Council, 1981). Mean annual flow computed for period when data were available for all streamflow-gaging stations. Abbreviations: FPKM, flood-plain kilometer; NUFPKM, North Umpqua flood-plain kilometer; km², square kilometer; m^3/s cubic meter per second]

Station name	Station No.	Period of record	Location	Corresponding study reach	Mean annual flow water years 1955–2004 (m³/s)	Drainage area (km²)	Peak flows (m³/s)			Recurrence interval flood magnitude (m³/s)
Station name	Station No.	Period of record	Location	Corresponding study reach	Mean annual flow water years 1955–2004 (m³/s)	Drainage area (km²)	December 1964	November– December 1996	December 2005	1.5 year	2 year	5 year	10 year	100 year
South Umpqua  River at Tiller	14308000	1910–11; 1939–2010	FPKM 273	Days Creek reach	29	1,163	1,705	1,303	895	377	481	763	963	1,641
South Umpqua  River near Brockway	14312000	1905–12; 1923–26; 1942–2010	FPKM 195.3	Roseburg reach	78	4,325	3,540	2,161	2,164	1,033	1,292	1,926	2,328	3,471
Umpqua River  at Elkton	14321000	1905–2010	FPKM 84.7	Garden Valley and Coast Range reaches	210	9,539	7,505	4,786	4,815	2,166	2,660	3,885	4,683	7,084
North Umpqua  River at Winchester	14319500	1908–13; 1923–29; 1954–2010	NUFPKM 2.5	North Umpqua reach	106	3,481	4,248	2,549	2,005	1,007	1,256	1,889	2,309	3,599