Â鶹ÒùÔº

Machine learning algorithms are gaining popularity in the hydrologic sciences. These algorithms often require tuning hyperparameters to tailor their performance to a specific purpose. Often these hyperparameters are selected based on prior assumptions or a single-objective optimization. However, these techniques fail to capture tradeoffs between type I (i.e., false positive)...

Much is still unknown about the current permafrost and hydrological conditions of the Gates of the Arctic National Park and Preserve. This study addresses the question of how thermal and hydrogeologic properties of the subsurface may affect active layer dynamics and groundwater flow in the Nutuvukti Lake watershed. Results from...

Zinc concentrations before and after the implementation of remediation strategies were examined in three sub-watersheds in southwestern Colorado. Three tributaries to the Animas River (Cement Creek, Mineral Creek, and the Upper Animas River) were analyzed for pre- and post- remediation changes in zinc loading. A fourth site below all tributaries...

In the McMurdo Dry Valleys of Antarctica (MDV), streams are an important source of water and hydrologic connectivity between glaciers and lakes across the valleys, however, these streams only run for a few weeks to a few months out of the year. Unlike the streams that are only active in...

Groundwater supports streamflow and ecosystems in semi-arid, montane catchments, which are environments considered particularly sensitive to climate change. Despite its importance, the relationship between groundwater and streamflow is not well understood. To remedy this, we seek to model groundwater-surface water interactions to assess how groundwater discharge to surface water varies...

Tracer experiments have been used to study the exchanges of channel waters with groundwater in streams and their impacts on ecosystem function and water quality are well documented (Bencala & Walters, 1983; Mulholland et al., 1997). However, these experiments are much more difficult in larger rivers due to higher flows...

Reduced human activity associated with lockdown protocols due to the Covid-19 pandemic have temporarily changed carbon emission patterns of urban ecosystems globally. Understanding how these changes anthropogenic activities contribute to the urban emissions offer the opportunity to better understand the carbon dynamics outside pandemic conditions. Here we explore how the...

The Swinomish People have long standing traditions of protecting, honoring, and thanking Mother Earth for the gifts that nourish our people. The culture of the Tribe is intrinsically tied to the health of the environment that sustains the habitat for our important natural resources and the cultural practices they support...

Wildfire-specific optical surrogates detect pyrogenic organic matter fluxes in freshwater mixing scenarios Sarah J. Fscher 1,2 , Tim Fegel 3 and Paul J. Wilkerson 2 , Leah Rivera 2 , Charles C. Rhoades 3 and Fernando L. Rosario-Ortiz 1,2 1 Department of Civil, Environmental and Architectural Engineering, University of Colorado...

Adam Wlostowski