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The algae have a marketing problem. While the scientific community may appreciate the important roles algae play as the base of the food chain in aquatic ecosystems, their contributions to global CO2-O2 cycling and practical applications are less understood. The messages the general public receives about algae are in the...

Integrated water resources planning is an example of a large-scale, long-term infrastructure planning problem that is impacted by climate change and multiple potential design alternatives and goals. Traditionally, simulation models were used to evaluate a small number of alternatives in a benefit-cost analysis. Emerging studies of deep uncertainty, conditions where...

The City of Boulder is responsible for supplying reliable, high-quality treated water to 120,000 customers. The reliability and quality of the water supply result from short-term operational decisions, long-term planning efforts and policy development that are informed by a variety of factors including scientific research, data, hands-on experience, economic considerations...

Profound changes in hydrology are occurring in Arctic and sub-Arctic regions. The Yukon River Watershed, covering 330,000 square miles in Alaska and western Canada, is no exception. Since 2006 the U.S. Geological Survey (USGS) and the Yukon River Inter-Tribal Watershed Council (YRITWC) have collaboratively managed the Indigenous Observation Network (ION)...

Urban development leads to changes in stormflow and baseflow, although the magnitude of these changes varies by city. This presentation will examine trends in streamflow with urbanization at the national scale (across the United States) and in Denver, ÃÛÌÇÖ±²¥. Across the U.S., we will examine trends in the flow duration...

Over a billion people globally depend on snowmelt runoff to meet water demands, predominantly from snow that accumulates annually in mid-latitude mountains. Decades of observations show that this natural reservoir is at risk; snow water equivalent and snow extent are declining; even as growing populations rely more on snow water...

Poised at the interface of rivers, ocean, atmosphere and dense human settlement, estuaries are driven by a large array of natural and anthropogenic forces. Long-term study of San Francisco Bay illustrates responses to five common agents of change where land and sea meet: water consumption and diversion, human modification of...

The Greenland Ice Sheet (GrIS) rapid mass loss is primarily driven by an increase in meltwater runoff, which highlights the importance of understanding the formation, evolution and impact of meltwater features on the ice sheet. Buried lakes are meltwater features that contain liquid water and exist under layers of snow,...

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...