USGS - science for a changing world

Scientific Investigations Report 2007–5117

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5117

Back to Table of Contents

Table 18. Akaike weights and supporting variables for evaluating models of lake level in relation to minimum July–August dissolved-oxygen concentration at Midnorth, Upper Klamath Lake, Oregon, 1990–2006.

[n=17 for all; +/-, the 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
Lake level and peak chlorophyll-a
Median monthly lake level + 3 40.9 22.8 0.0 1.00 0.55
Peak chlorophyll-a concentration - 3 43.1 23.7 .9 .65 .35
Median monthly lake level and peak chlorophyll-a concentration +, + 4 40.7 26.2 3.4 .18 .10
Lake level and degree-days
Median monthly lake level + 3 40.9 22.8 0.0 1.00 0.55
Degree-days from April 1 to May 15 - 3 43.2 23.7 .9 .63 .35
Median monthly lake level and degree-days from April 1 to May 15 +, + 4 40.6 26.2 3.4 .19 .10
Lake level and water temperature
Median monthly lake level + 3 40.9 22.78 3.5 0.17 0.11
75th-percentile water temperature - 3 33.3 19.28 .0 1.00 .66
Median monthly lake level and 75th-percentile water temperature +, - 4 30.7 21.40 2.1 .35 .23
Lake level and Williamson River discharge
Median monthly lake level + 3 40.9 22.8 0.0 1.00 0.54
Cumulative Ocober–May Williamson River discharge - 3 43.2 23.7 .9 .63 .34
Median monthly lake level and cumulative October–May Williamson River discharge +, - 4 39.9 25.9 3.1 .22 .12
Lake level and wind speed
Median monthly lake level + 3 40.9 22.8 0.0 1.00 0.53
Median monthly wind speed + 3 42.8 23.6 .8 .68 .36
Median monthly lake level and median monthly wind speed +, + 4 39.9 25.8 3.0 .22 .11

Back to Table of Contents

AccessibilityFOIAPrivacyPolicies and Notices

Take Pride in America logoUSA.gov logoU.S. Department of the Interior | U.S. Geological Survey
Persistent URL: https://pubs.water.usgs.gov/sir20075117
Page Contact Information: Publications Team
Page Last Modified: Thursday, 01-Dec-2016 19:46:34 EST