Scientific Investigations Report 2007–5117
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5117
Table 17. Akaike weights and supporting variables for evaluating models of water temperature and a second physical variable in relation to minimum July–August dissolved-oxygen concentration at Midnorth, Upper Klamath Lake, Oregon, 1990–2006.
[Water temperature is 75th percentile; n=17 for all; +/-, sign of the coefficient in the model, respectively; K, number of parameters in the model; RSS, residual sum of squares; AICc, Akaike information criterion; ∆i, AICi minus the minimum AICc for the set; wi, Akaike model weight; shading indicates the best fit model for each set]
| Model | +/- | K | RSS | AICc | ∆i | e(-0.5*∆i) | wi |
|---|---|---|---|---|---|---|---|
| Water temperature | - | 3 | 33.3 | 19.3 | 0.0 | 1.00 | 0.40 |
| Water temperature and median monthly wind speed | -, - | 4 | 29.2 | 20.6 | 1.3 | .53 | .21 |
| Water temperature and median monthly lake level | -, + | 4 | 30.7 | 21.4 | 2.1 | .35 | .14 |
| Water temperature and cumulative October–May Williamson River discharge | -, - | 4 | 32.0 | 22.1 | 2.8 | .25 | .10 |
| Water temperature and peak chlorophyll-a concentration | -, - | 4 | 33.3 | 22.8 | 3.5 | .17 | .07 |
| Water temperature and degree-days from April 1 to May 15 | -, - | 4 | 33.2 | 22.7 | 3.4 | .18 | .07 |
U.S. Department of the Interior | U.S. Geological Survey
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