USGS Scientific Investigations Report 2013–5001  - Sources and Characteristics of Organic Matter in the Clackamas River, Oregon, Related to the Formation of Disinfection By-Products in Treated Drinking Water 

Table 4. Summary of data collection including continuous dissolved organic matter fluorescence deployments and discrete water-sample collection in the Clackamas River basin, Oregon, 2010–11. 

[Sampling date(s): Range of dates is shown in parentheses. Abbreviation: FDOM, fluorescing dissolved organic matter] 

Sampling date(s)	FDOM sensor		Sampling activity			Flow condition	Description
Sampling date(s)	WET Labs™ WETStar	Turner Designs™ Cyclops	Monthly	Basin-wide surveys	Reservoir sampling	Flow condition	Description
04-14-2010	X		X			Medium high	Springtime melt-runoff
05-(11–12)-2010	X		X	X		Medium high
06-05-2010	X		X			Very high
07-08-2010	X		X			Medium low
08-03-2010	X		X		X	Low	Algal bloom in North Fork Reservoir
09-(03–07)-2010	X		X		X	Low-medium low
10-10-2010	X		X	X		Medium low	Initial autumn storm
11-01-2010	X		X			Medium	Major flush storm event
12-07-2010	X		X			Medium
01-18-2011	X		X			Very high
02-16-2011	X		X			Medium high
03-16-2011	X	X	X			High
04-19-2011	X	X	X			Medium high
05-24-2011	X	X	X			Medium high
06-29-2011	X	X	X			Medium	Periphyton sloughing
08-02-2011	X	X	X			Medium low	Algal bloom in North Fork Reservoir
09-(08–09)-2011	X	X	X	X	X	Medium low	Summer base flow
09-(16–22)-2011		X		X	X	Medium low	Timothy Lake drawdown
October 2011		X				Medium
November 2011		X				Medium
December 2011		X				Medium low