Table 10. Sources of sediment yield data for Oregon and California watersheds.

[Pour point: refers to outlet of contributing drainage basin. Abbreviations: km², square kilometer; km/km², kilometer per square kilometer; m/yr, millimeter per year; SPI, sediment production index; km^-1, kilometer per square kilometer; km²/yr, square kilometer per year; –, no data available]

River	Pour point latitude	Pour point longitude	Basin area (km2)	Mean slope (percent)	Drainage density (km/km2)	Mean annual precipi- tation (m/yr)	SPI (km-1)	Bedload yield	Suspended yield	Totalyield	Period of record	Method	Notes and assumptions regarding fraction of total load carried as bedload	Source
								(metric tons/km2/yr)
Chetco River, Oregon	42.123	-124.187	701	0.45	1.37	3.10	0.62	221	–	–	1970–2008	Bedload equations		1
Smith River, California	41.949	-124.209	1,863	0.38	2.73	2.75	1.04	84	250	334	1938–2005	Bedload equations		2
Pistol River, Oregon	42.276	-124.408	272	0.33	1.76	3.14	0.59	180	–	910	1940–1991	Landslide volumes	Bedload 20 percent of total, as per Redwood and Smith rivers	3
Flynn Creek, Oregon	44.539	-123.853	2.2	0.25	1.12	2.28	0.28	16	–	–	1959–1973	Bedload sampling		4
Clackamas River Oregon
River Mill Reservoir	45.299	-122.351	1,762	0.31	2.29	1.55	0.72	19	–	62	1905–1965	Reservoir survey	Bedload 30 percent of total, based on sediment sampling in River Mill Reservoir	5
North Fork Revervoir	45.243	-122.280	1,728	0.32	2.30	2.00	0.73	59	–	197	1958–2000	Reservoir survey		5
Harriet Lake	45.074	-121.965	337	0.18	1.22	1.61	0.22	2.7	–	9.1	1924–1985	Reservoir survey		5
Combined5	45.299	-122.351	1,762	0.31	2.29	1.99	0.72	31	–	102	1905–2000	Reservoir survey		5
Redwood Creek, California
Blue Lake	40.906	-123.815	175	0.33	1.16	2.34	0.38	496	–	2,480	1945–1980	Bedload sampling	Bedload 20 percent of total (Mary Ann Madej, U.S. Geological Survey, written commun., May 28, 2009) not included in regression due to extensive landuse affects	6
Orick	41.299	-124.051	713	0.34	1.17	2.06	0.39	420	–	2,100	1945–1980	Bedload sampling		6
Oak Creek, Oregon	44.605	-123.333	7.4	0.30	0.81	1.68	0.24	10	–	–	1980	Bedload sampling	Limited flow data available	7
McKenzie River, Oregon
HJ Andrews watershed 1, pre-treatment	44.219	-122.244	0.9	0.43	2.84	2.37	1.22	3.0	14	18	1958–1966	Bedload sampling	Not included in regression due to direct affects of land use and small basin size	8
HJ Andrews watershed 1, post-treatment								60	170	230	1967–1988	Bedload sampling		8
HJ Andrews watershed 2	44.212	-122.245	0.7	0.48	2.61	2.32	1.26	9.0	16	25	1958–1988	Bedload sampling		8
HJ Andrews watershed 3, pre-treatment	44.208	-122.258	1.0	0.51	2.66	2.27	1.36	14	150	170	1958–1963	Bedload sampling		8
HJ Andrews watershed 3, post-treatment								560	260	820	1964–1988	Bedload sampling		8
Deschutes River, Oregon
Lake Billy Chinook, Deschutes arm	44.526	-121.299	5,600	0.08	0.65	0.66	0.05	2.2	–	4.4	1964–1998	ReservoirDeltaSurvey	Bedload 50 percent of total, from delta sediment surveys	9
Lake Billy Chinook, Crooked River arm	44.514	-121.266	4,162	0.08	1.32	0.30	0.11	3.1	–	6.1	1964–1998	ReservoirDeltaSurvey	Bedload 50 percent of total, from delta sediment surveys	9
Prineville Reservoir	44.111	-120.789	6,901	0.12	2.09	0.37	0.25	5.2	–	26	1960–1998	ReservoirSurvey	Bedload 20 percent of total, regional value	9
Ochoco Reservoir	44.299	-120.727	753	0.25	1.65	0.46	0.41	16.1	–	80	1920–1990	ReservoirSurvey	Bedload 20 percent of total, regional value	9
Klamath River, California
Iron Gate Revervoir, Camp/Dutch Creek	41.973	-122.436	51	0.34	3.92	0.62	1.33	24.2	–	48	1963–2003	ReservoirDeltaSurvey	Bedload 50 percent of total, based on this study’s estimate	10
Iron Gate Revervoir, Jenny Creek	41.977	-122.399	500	0.15	2.01	0.70	0.31	3.3	–	6.7	1963–2003	ReservoirDeltaSurvey		10
Iron Gate Revervoir, Scotch Creek	41.974	-122.439	47	0.34	4.93	0.61	1.67	32.0	–	64	1963–2003	ReservoirDeltaSurvey		10
McKenzie River, Oregon
Smith Reservoir	44.333	-122.047	35	0.39	2.12	2.55	0.83	53	–	251	1963–2004	ReservoirSurvey	Bedload 21 percent of total, estimated in source study from measured ratios in HJ Andrews experimental watersheds	11
Trail Bridge Reservoir, Mckenzie Arm	44.282	-122.044	56	0.17	1.38	2.24	0.23	4.0	–	20	1963–2004	ReservoirSurvey		11
Trail Bridge Reservoir, Smith Arm	44.279	-122.050	19	0.39	2.63	2.13	1.03	57	–	273	1963–2004	ReservoirSurvey		11
North Umpqua River, Oregon
Lemolo Lake	43.312	-122.160	186	0.18	1.04	1.60	0.19	40	–	200	1954–1992	ReservoirSurvey	Bedload 20 percent of total, as estimated by this study	12
Stump Lake	43.246	-122.281	103	0.16	0.49	1.46	0.08	24	–	120	1953–1992	ReservoirSurvey	Bedload 20 percent of total, as estimated by this study	12
Hagg Lake, Oregon	45.472	-123.202	96	0.26	2.86	1.73	0.74	49	–	247	1974–2001	ReservoirSurvey	Bedload 20 percent of total, as estimated by this study	13
Dorena Lake, Oregon	43.787	-122.955	680	0.38	3.59	1.62	1.37	22	–	108	1949–1998	ReservoirSurvey	Bedload 20 percent of total, as estimated by this study	14
Detroit Lake, Oregon
Santiam Arm	44.711	-122.116	572	0.28	3.39	2.19	0.94	7.3	–	–	1953–2003	Reservoir Delta Survey	Survey assumed 80 percent of deposition was coarse bedload	15
Brightenbush Arm	44.739	-122.152	280	0.42	3.92	2.06	1.65	23.5	–	–	1953–2003	Reservoir Delta Survey		15
Blowout Arm	44.681	-122.193	137	0.38	4.50	2.26	1.72	25.1	–	–	1953–2003	Reservoir Delta Survey		15

¹ Wallick and others, 2010.

² MFG Inc. and others, 2006.

³ Russell, 1994.

⁴ Stednick, 2008.

⁵ Wampler, 2004.

⁶ Lisle and Madej, 1992.

⁷ Peter Klingeman, Oregon State University, written commun., 2009.

⁸ Grant and Wolff, 1990.

⁹ O'Connor and others, 2003.

¹⁰PacifiCorp, 2004.

¹¹Stillwater Sciences, 2006.

¹²Stillwater Sciences, 2000.

¹³Ferrari, 2001.

¹⁴Ambers, 2001

¹⁵Tetratech, 2009.

First posted September 29, 2011