Scientific Investigations Report 2006–5209
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5209
Table 12. Spearman’s rho correlation coefficients between selected water-quality and climate variables in Upper Klamath Lake Basin, Oregon, 1990–2004.
[Water-quality data are biweekly values of chlorophyll a and nutrient concentrations, and biweekly profiles of dissolved oxygen concentration collected by the Klamath Tribes at seven sites in Upper Klamath Lake. Means at the Klamath Falls Airport were calculated from hourly values obtained from the National Climatic Data Center (NCDC) after first selecting those that fell in the upper one-half of the distribution for the month, as determined by combining 15 years of the record from 1990 to 2004. Correlations that are significant (p<0.05) are in boldface type. Median July-Aug. ∆DO: median difference between water column maximum and minimum dissolved oxygen concentration. Mean July-Aug. wind speed: mean of July and August wind speed at the Klamath Falls Airport. Cumulative Oct.-May discharge: discharge at U.S. Geological Survey station 11502500 from October of the previous calendar year through May of the current year. Symbols: <, less than]
| Concentrations | Spearman’s rho correlation coefficient | ||||||
|---|---|---|---|---|---|---|---|
| Concentrations | Mean July–Aug. wind speed |
Cumulative Oct.–May Williamson River discharge |
|||||
| Median July–Aug. chlorophyll a |
Median May–June chlorophyll a |
Median July–Aug. ammonia |
Median May–June ammonia |
Median July–Aug. ∆DO |
|||
| Median July–Aug. chlorophyll a | 1.00 | -0.32 | 0.00 | 0.23 | -0.10 | -0.08 | 0.11 |
| Median May–June chlorophyll a | 1.00 | .12 | .24 | .15 | .33 | -.32 | |
| Median July–Aug. ammonia | 1.00 | .81 | -.01 | -.52 | .75 | ||
| Median May–June ammonia | 1.00 | -.10 | -.54 | .52 | |||
| Median Jul–Aug ∆DO | 1.00 | -.14 | .32 | ||||
| Mean July–Aug. wind speed | 1.00 | -.71 | |||||
| Cumulative Oct.–May Williamson River discharge | 1.00 | ||||||
U.S.
Department of the Interior | U.S. Geological
Survey
Persistent URL: https://pubs.water.usgs.gov/sir20065209
Page Contact Information: Publications Team
Page Last Modified: Thursday, 01-Dec-2016 19:13:07 EST
