Big Hole River Temperature
Twenty years of Big Hole Watershed data show water temperatures climbing while overall flow stays flat, stressing the exact August window Arctic Grayling, ranchers, and irrigators all depend on.
Climate data from the Big Hole Watershed over the last twenty years has revealed that water temperatures are rising while overall water quantity has stayed relatively flat. Working with seasonal data plots, a 2013 water temperature study, and local rancher Erik Kalsta, I examined how earlier snowmelt and hotter summers are adding stress to the exact August window Arctic Grayling depend on most. My findings support how that kind of stress puts ranchers, irrigators, and fish habitat in direct competition for the same water.

