USGS Scientific Investigations Report 2012–5200  - Suspended-Sediment Characteristics of the Johnson Creek Basin, Oregon, Water Years 2007

Table 7. Monthly and average annual suspended-sediment yield for the Gresham and Milwaukie gaging stations, Johnson Creek basin, Oregon, water years 2007–10. 

[Station reference: Complete station names are shown in table 1 and locations are shown in figure 1. All suspended-sediment load values rounded to 3 significant figures, which results in the percentage of annual total values not computing precisely] 

Month	Suspended-sediment yield, in tons per square mile
	Water year
	2007	2008	2009	2010	Average (2007–10)
Gresham
October	0.16	6.3	0.07	0.74	1.8
November	46	13	12	6.9	19
December	44	67	23	8.1	36
January	30	23	74	11	34
February	14	15	6.3	3.7	10
March	16	11	10	19	14
April	1.5	2.6	3.6	4.8	3.1
May	0.26	0.45	6.1	1.5	2.1
June	0.13	0.53	0.59	10	2.8
July	0.03	0.02	0.05	0.01	0.028
August	0.02	0.04	0.10	0.01	0.042
September	0.49	0.01	0.23	0.04	0.19
Total	153	138	136	66.0	123
Milwaukie
October	0.35	4.5	0.23	0.60	1.4
November	33	8.1	6.5	4.1	13
December	31	58	15	6.8	28
January	17	15	47	11	23
February	9.4	12	3.5	2.5	7
March	11	6.6	5.4	16	10
April	1.0	1.7	1.8	3.0	1.9
May	0.25	0.37	3.1	1.7	1.3
June	0.39	0.48	0.52	7.98	2.3
July	0.10	0.08	0.10	0.06	0.08
August	0.12	0.10	0.17	0.04	0.11
September	0.66	0.12	0.20	0.20	0.29
Total	104	107	83.4	53.8	87.2

Suspended-Sediment Characteristics of the Johnson Creek Basin, Oregon, Water Years 2007–10

Suspended-Sediment Characteristics of the Johnson Creek Basin, Oregon, Water Years 2007–10 