Air-Water temperature relationships in the trout streams of southeastern Minnesota's carbonate-sandstone landscape

Lori A. Krider, Joseph A. Magner, Jim Perry, Bruce Vondracek, Leonard C. Ferrington

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Carbonate-sandstone geology in southeastern Minnesota creates a heterogeneous landscape of springs, seeps, and sinkholes that supply groundwater into streams. Air temperatures are effective predictors of water temperature in surface-water dominated streams. However, no published work investigates the relationship between air and water temperatures in groundwater-fed streams (GWFS) across watersheds. We used simple linear regressions to examine weekly air-water temperature relationships for 40 GWFS in southeastern Minnesota. A 40-stream, composite linear regression model has a slope of 0.38, an intercept of 6.63, and R2 of 0.83. The regression models for GWFS have lower slopes and higher intercepts in comparison to surface-water dominated streams. Regression models for streams with high R2 values offer promise for use as predictive tools for future climate conditions. Climate change is expected to alter the thermal regime of groundwater-fed systems, but will do so at a slower rate than surface-water dominated systems. A regression model of intercept vs. slope can be used to identify streams for which water temperatures are more meteorologically than groundwater controlled, and thus more vulnerable to climate change. Such relationships can be used to guide restoration vs. management strategies to protect trout streams.

Original languageEnglish (US)
Pages (from-to)896-907
Number of pages12
JournalJournal of the American Water Resources Association
Issue number4
StatePublished - Aug 2013


  • Climate change/variability
  • Karst hydrology
  • Land management
  • Linear regression models
  • Rivers/streams
  • Surface water/groundwater interactions


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