Search Results

You are looking at 1 - 6 of 6 items for :

  • Seasonal effects x
  • Integrated Watershed-Scale Response to Climate Change in Selected Basins across the United States x
  • All content x
Clear All
Lauren E. Hay, Steven L. Markstrom, and Christian Ward-Garrison

1. Introduction In recognition of the vulnerability of freshwater resources to changing climate, many studies have sought to examine the effects of climate change on components of the hydrologic budget. The most common approach has been to combine basin-scale hydrologic models with climate-change scenarios derived from general circulation model (GCM) output ( Buytaert et al. 2009 ). GCMs are considered the most advanced tool currently available for simulating the effects of increasing

Full access
Daniel E. Christiansen, Steven L. Markstrom, and Lauren E. Hay

effects, the GSL is traditionally associated with crop production and impacts on crop yields. For any agricultural commodity, variation in yield between years is related to the growing season weather ( Backlund et al. 2008 ). Such a change in GSL could translate to a corresponding change in water usage, that is, an increase in usage due to a longer growing season or a decrease due to a shorter period for crops to reach maturity ( Backlund et al. 2008 ). As with agriculture, GSL affects forested areas

Full access
Kathryn M. Koczot, Steven L. Markstrom, and Lauren E. Hay

1. Introduction In a recent study conducted by the U.S. Geological Survey, the hydrologic effects of different emission scenarios for the twenty-first century were evaluated for 14 basins in different hydroclimatic regions across the United States (see Hay et al. 2011 ). The Precipitation-Runoff Modeling System (PRMS) (see Leavesley et al. 1983 ), a process-based, distributed-parameter watershed model, was used to evaluate these hydrologic effects. For each of the 14 basins, simulated

Full access
Mark C. Mastin, Katherine J. Chase, and R. W. Dudley

salmon. Snowmelt runoff has been identified as a sensitive hydrologic parameter that responds to climate change in New England ( Hodgkins et al. 2009 ). Managers tasked with the protection and recovery of Atlantic salmon in coastal Maine rivers are concerned about the effects of observed trends in winter–spring runoff timing that occur during salmon migration. In the western United States, concerns are similar for Pacific salmon, including the concern about increasing water temperatures that can be

Full access
David M. Bjerklie, Thomas J. Trombley, and Roland J. Viger

migration, but also seasonal in-stream temperature. The results also indicate that recreational activities dependent on snow, such as skiing, may be impacted over the course of this century, with lower snowfalls and shorter snow seasons. These results do not address potential land-cover changes. Extensive urban growth and increasing demands for off-stream water use, combined with the effects of climate change, will potentially affect future flow regimes in the region. Future studies should address the

Full access
John Risley, Hamid Moradkhani, Lauren Hay, and Steve Markstrom

assess the effects of potential climate change on mean annual runoff throughout the conterminous United States, Wolock and McCabe ( Wolock and McCabe 1999 ) used a simple water-balance model and output from two atmospheric GCMs. However, their results were uncertain because they were mostly within the range of GCM decade-to-decade variability and GCM model error. To simulate hydrologic climate changes at a watershed scale, downscaled GCM air temperature and precipitation data can be input to

Full access