Table 9. Bed-material data and transport rates in the Umpqua River basin, Oregon.

[Refer to appendix C for particle-size distributions and additional site descriptors. Site name: Many site names are informal labels developed for this study. Water surface slope: Used to calculate transport capacity. See text for data sources. Diameter: D₅₀, grain size diameter in millimeters where 50 percent of sample is finer by volume. Surface-based calculations: Mean annual transport capacity for Umpqua River sites calculated for water years 1951–2008. Cow Creek sites at Riddle Bridge and USGS streamflow gaging-station computed for water years 1955–2008. Mobility index: Calculated as the reference transport discharge from Parker equation, divided by the 1.5-year flood discharge. Q_t, P/Q 1.5 yr, Reference discharge predicted by the Parker (1990a, 1990b) transport capacity equation divided by the discharge for the flood with 0.67 exceedance probability (1.5-year flow). See text for complete description. Abbreviations: FPKM, flood-plain kilometer; RM, river mile; mm, millimeter; yr, year; USGS, U.S. Geological Survey; –, data not obtained or value not calculated]

Site No.	Site name	Reach	FPKM	RM	Percent felsic intrusive	Percent sandstone	Diameter (mm)		Armoring ratio (mm/mm)	Water surface slope (percent)	Subsurface-based calculations			Surface-based calculations		Mobiity index (Qt,P/Q 1.5 yr)
							Surface D50	Substrate D50			Parker-Klingeman-McLean	Parker-Klingeman		Parker	Wilcock-Crowe
1	Scottsburg Bar	Coast Range	41.6	29.0	2.0	3.8	52.9	14.5	3.66	0.100	389,450	363,300		49,420	28,070	0.290
2	Bunch Bar	Coast Range	61.7	41.5	1.3	2.5	30.3	14.4	2.11	0.045	10,750	10,380		5,110	4,840	0.581
3	Elkton Elementary School Bar	Coast Range	70.8	47.5	0.8	2.8	22.5	–	–	0.045	–	–		19,330	11,970	0.244
4	Jones Bar	Coast Range	88.5	59.2	1.6	2.3	29.9	15.9	1.88	0.096	127,120	119,410		106,080	194,640	0.137
5	Maupin Bar	Coast Range	94.5	63.2	1.8	5.0	62.6	13.3	4.73	0.043	7,780	7,520		50	1,930	2.049
6	Kellog Bar	Coast Range	107.6	71.9	1.1	6.9	16.7	13.4	1.25	0.064	56,440	53,740		103,350	240,090	0.164
7	Hutchinson Wayside Bar	Coast Range	112.3	75.0	3.5	4.8	39.6	14.4	2.75	0.112	512,410	470,980		134,060	88,710	0.068
8	Mary’s Island Bar	Coast Range	121.3	80.6	1.8	2.0	34.7	11.4	3.04	0.047	27,240	26,320		5,250	2,150	0.638
9	Indian Bend Road Bar	Coast Range	134.3	88.7	3.0	3.0	26.5	15.6	1.70	0.049	12,300	10,610		12,840	40,910	0.395
10	Cougar Creek Bar	Coast Range	140.9	92.7	3.3	2.3	47.1	16.8	2.81	0.077	73,440	69,640		21,230	20,260	0.464
11	Branton Bar	Garden Valley	149.0	97.9	2.3	8.6	19.9	20.1	0.99	0.108	81,530	77,270		227,080	623,020	0.096
12	Coles Valley Bar	Garden Valley	154.8	101.8	2.4	–	53.1	27.4	1.94	0.069	1,930	2,280		7,460	49,460	0.623
13	Cleveland Rapids Bar	Garden Valley	164.7	109.1	1.6	1.5	56.1	29.2	1.92	0.149	68,300	66,250		71,790	114,250	0.177
14	Two Forks Bar	Garden Valley	168.4	111.6	0.3	–	55.8	23.7	2.35	0.049	250	340		230	14,130	1.486
15	Umpqua Sand and Gravel Bar	Roseburg	171.4	115.3	2.2	–	18.6	12.7	1.46	0.072	2,290	2,280		9,070	27,200	0.298
16	Doyle Lane Bar	Roseburg	175.1	118.1	3.8	–	30.4	–	–	0.095	–	–		50,230	116,420	0.142
17	Elk Island Bar	Roseburg	181.8	123.2	5.8	–	50.3	–	–	0.035	–	–		0	0	3.846
18	Little Valley Bar	Roseburg	189.8	129.0	5.1	–	21.1	15.2	1.39	0.078	30,710	9,640		27,110	33,250	0.238
19	Stratton Bar	Roseburg	193.3	131.4	2.5	–	37.6	15.0	2.50	0.054	2,100	1,970		620	1,220	0.780
20	Roberts Mountain Bar	Roseburg	198.1	135.2	5.5	–	63.5	27.3	2.32	0.081	190	400		140	1,700	1.337
21	Civil Bend Bar	Roseburg	201.4	138.0	3.5	–	25.4	–	–	0.071	–	–		7,620	4,680	0.443
22	Willis Creek Bar	Roseburg	204.0	139.8	1.0	–	15.7	–	–	0.101	–	–		242,600	156,110	0.033
23	Doerner Bridge Bar	Roseburg	206.5	141.5	6.1	–	66.5	–	–	0.128	–	–		11,340	10,730	0.450
24	Weigle Bar	Roseburg	211.0	144.7	10.1	–	22.1	12.9	1.72	0.082	67,850	63,550		82,240	128,300	0.068
25	Booth Hill Bar	Roseburg	215.8	147.9	5.3	–	58.2	–	–	0.118	–	–		16,270	8,670	0.366
26	Myrtle Creek Bridge Bar	Roseburg	219.9	150.5	6.8	–	28.6	–	–	0.165	–	–		305,420	222,040	0.048
27	Western Bar	Roseburg	220.8	151.0	4.2	–	59.3	15.1	3.93	0.149	297,820	278,880		36,340	45,420	0.272
28	Missouri Bottom Bar	Roseburg	227.0	155.6	5.1	–	66.2	–	–	0.114	–	–		2,160	7,460	0.643
29	Lawson Bar	Roseburg	230.1	158.2	2.3	–	19.3	18.2	1.06	0.090	14,950	14,140		61,450	37,150	0.156
30	Gazley East	Days Creek	232.0	159.2	6.6	–	39.2	13.6	2.87	0.145	5,080	6,050		540	2,350	0.345
31	Stanton Park Bar, Right	Days Creek	235.4	162.1	7.9	–	41.5	38.5	1.08	0.151	90	140		8,220	11,580	0.263
32	Jack’s Bar	Days Creek	239.9	165.1	12.4	–	85.6	–	–	0.173	–	–		40	470	1.312
33	Days Creek Bridge Bar	Days Creek	246.8	169.6	6.3	–	98.5	–	–	–	–	–		–	–	–
34	Days Creek Bar	Days Creek	250.0	172.0	7.6	–	108.0	41.5	2.60	0.237	2,870	2,940		1,360	1,060	0.860
35	Bennett Bar	Days Creek	254.6	175.2	4.9	–	77.4	–	–	0.313	–	–		6,950	12,940	0.446
36	Lavadoure Creek Road Bar	Days Creek	257.0	177.0	10.5	–	121.5	33.7	3.61	0.233	4,450	4,400		110	100	1.354
37	Ludwig Bar	Days Creek	260.1	178.9	13.9	–	93.5	–	–	0.409	–	–		8,850	60,350	0.478
38	Milo Bridge Bar	Days Creek	263.6	181.2	13.6	–	95.9	–	–	0.340	–	–		14,060	34,740	0.271
39	Old Bridge Bar	Days Creek	267.9	184.1	22.1	–	79.7	–	–	0.381	–	–		17,460	37,090	0.353
40	Parking Area Bar	Days Creek	269.1	184.8	17.1	–	37.9	21.9	1.73	0.337	175,380	164,350		57,810	99,800	0.088
41	Tiller Bar	Days Creek	272.5	187.0	5.5	–	30.1	–	–	–	–	–		–	–	–
Tributary sites
42	Page Road Bar	North UmpquaRiver	15.8	10.8	0.52	–	30.3	25.8	1.2	–	–	–	–	–	–
43	Short’s Quarry Bar	North UmpquaRiver	18.2	12.5	0.00	–	84.4	–	–	–	–	–	–	–	–
44	Whistlers Bend Bar, Downstream	North UmpquaRiver	32.6	21.6	0.52	–	61.5	–	--	–	–	–	–	–	–
45	Whistlers Bend Bar, Upstream	North Umpqua River	33.5	22.2	0.50	–	56.9	42.3	1.3	–	–	–	–	–	–
46	Altered Giants Bar	North UmpquaRiver	35.7	23.6	1.04	–	109.7	–	--	–	–	–	–	–	–
47	Sutherlin Bridge Bar	Calapooya	10.0	9.0	0.25	1.52	28.5	16.8	1.7	–	–	–	–	–	–
48	Riddle Bridge Bar	Cow Ck	3.5	2.5	3.78	–	30.9	30.7	1.0	–	1,550	1,520	17,040	9,970	–
49	Conglomorate Outcrop Bar	Cow Ck	11.0	7.9	3.01	–	27.7	–	--	–	–	–	–	–	–
50	Myrtle Creek #2	Myrtle Ck	0.1	0.0	15.84	–	22.4	–	--	–	–	–	–	–	–
51	Myrtle Creek #1	Myrtle Ck	0.3	0.1	21.64	–	26.8	14.9	1.8	–	–	–	–	–	–
USGS streamflow gaging-stations
52	USGS streamflow gaging-station at Elkton1	Coast Range	84.7	57.0	–	–	–	–	--	0.042	3,650	3,510	2,270	9,510	–
53	USGS streamflow gaging-station at Brockway2	Roseburg	195.3	132.9	–	–	–	–	--	0.144	47,730	44,030	16,120	25,410	–
54	USGS streamflow gaging-station at Tiller3	Days Creek	273.0	187.3	–	–	–	–	–	0.199	53,670	50,160	9,420	23,800	–
55	USGS streamflow gaging-station at Cow Creek4	Cow Creek	10.8	6.7	–	–	–	–	–	0.192	8,490	7,970	44,590	24,050	–

¹ Grain-size data for Elkton gaging station bedload-transport capacity estimates from Elkton Elementary School Bar and Jones Bar.

² Grain-size data for Brockway gaging station bedload-transport capacity calculations taken from Stratton Bar and Robert Mountain Bar.

³ Grain-size data for Tiller gaging station bedload-transport capacity calculations taken from Old Bridge and Parking Area Bar.

⁴ Grain-size data for Riddle gaging station bedload-transport capacity calculations taken from Riddle Bridge Bar.

First posted September 29, 2011