Characterizing Past and Future Flood Regimes of California's Cosumnes River: A Hydroinformatic Approach

As the only major undammed river on the west slope of California's Sierra Nevada, with over 100 years of USGS streamflow data, and the location of several floodplain conservation and restoration efforts, the Cosumnes River offers a unique opportunity to study connections between a river's flow...

PPIC Viewpoint

Professor Joshua Viers weighs in on " natural disasters " and the role of floods shaping floodplains.

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Incorporating Climate Change in Flow Regime Alteration Studies in Hydropower Licensing

The U.S. Federal Energy Regulatory Commission has yet to mandate incorporation of anticipated climate change effects on hydropower system operations when assessing environmental impacts from the renewal of hydropower licenses. One stated reason is the lack of specific project-level specificity...

Quantifying the Restorable Water Volume of California's Sierra Nevada Meadows

The Sierra Nevada is estimated to provide over 66% of California's water supply, which is largely derived from snowmelt. Global climate warming is expected to result in a decrease in snow pack and an increase in melting rate, making the attenuation of snowmelt by any means, an important...

A Method to Consider Whether Dams Mitigate Climate Change Effects on Stream Temperatures

This article provides a method for examining mesoscale water quality objectives downstream of dams with anticipated climate change using a multimodel approach. Coldwater habitat for species such as trout and salmon has been reduced by water regulation, dam building, and land use change that...

Simulating High-Elevation Hydropower with Regional Climate Warming in the West Slope, Sierra Nevada

Water systems in snowmelt-dominated hydroregions such as California’s Sierra Nevada mountains are sensitive to regional climate change, hydropower systems in particular. In this study, a water resources management model was developed for the upper west slope Sierra Nevada to understand the...

In bad waters: Water year classification in nonstationary climates

Water year indices and drought indices are helpful for categorizing water years into similar types, allowing water managers and policymakers to quantify years, visualize variability, and guide water operations. Many water management decisions, such as environmental flow requirements and water...

Hydroclimatic alteration increases vulnerability of montane meadows in the Sierra Nevada, California

Meadow ecosystems of the Sierra Nevada (California, USA) have been maintained by the interplay of biotic and abiotic forces, where hydrological functions bridge aquatic and terrestrial realms. Meadows are not only key habitat for fishes, amphibians, birds, and mammals alike, but also provide...

Characterization of the Unregulated Spring Snowmelt Recession in the Sierra Nevada, California, and Potential Changes with Regional Climate Warming

In previous work, we developed a conceptual model for the ecology and management of the spring snowmelt recession in Mediterranean-montane catchments. This conceptual model focused on three components of the Natural Flow Regime: magnitude, timing, and rate of change. Here we provide a model...

Conceptual ecosystem model of sub-Arctic river response to climate change: Kobuk River, Alaska

The Kobuk River runs west along the southern Brooks Range from Gates of the Arctic National Park in Alaska, USA, to the Chukchi Sea. It is highly vulnerable to changes in climate due to its sub-Arctic location, unique geography, and permafrost foundation. Combined with its pristine condition,...

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