Spatiotemporal dynamics of water sources in a mountain river basin inferred through δ2H and δ18O of water.

ABSTRACT: In mountainous river basins of the Pacific Northwest, climate models predict that winter warming will result in increased precipitation falling as rain and decreased snowpack. A detailed understanding of the spatial and temporal dynamics of water sources across river networks will help illuminate climate change impacts on river flow regimes. Because the stable isotopic composition of precipitation varies geographically, variation in surface water isotope ratios indicates the volume-weighted integration of upstream source water. We measured the stable isotope ratios of surface water samples collected in the Snoqualmie River basin in western Washington over June and September 2017 and the 2018 water year. We used ordinary least squares regression and geostatistical Spatial Stream Network mod

SUBMITTER: McGill LM 

PROVIDER: S-EPMC8040057 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature