Your browser does not support JavaScript!
National Park Service Title

US Geological Survey / National Park Service - Water Quality Partnership


Yosemite National Park

Yosemite National Park

  Partnership Projects in Yosemite National Park

  • 1999 - Atmospheric depostition of lakes in the Pacific West Region (multi-park project)
  • 2003 - Risk Assessment for Aquatic Ecosystems in Wilderness Areas
  • 2006 - Water-Quality Monitoring in Support of Establishing User Capacities
  • 2008 - Occurrence and Distribution of Current-Use Pesticides in Atmospheric Deposition
  • 2009 - Map critical loads of atmospheric nitrogen deposition (multi-park project)
  • 2013 - Effects of Stock and Backpackers on Water Quality in Yosemite National Parkz

  • 2018 - Are Mountain Lakes on a Trajectory of Rapid Eutrophication toward Harmful Algal Blooms? (ROMO, SEKI, SIEN, YOSE)


Brown, L.R. and T.M. Short. 1999. Biological, habitat, and water quality conditions in the upper Merced River drainage, Yosemite National Park, California, 1993-1996. U.S. Geological Survey Water-Resources Investigations Report 99-4088. 56 p.

Clow, D.W., Nanus, L., Huggett, B, 2010, Use of regression-based models to map sensitivity of aquatic resources to atmospheric deposition in Yosemite National Park, USA. Water Resources Research, 46: Issue 9, Sept. 2010.

Clow, D.W., Peavler, R.S., Roche, J., Panoraska, A.K., Thomas, R.M. Smith, S, 2011, Assessing possible visitor-use impacts on water quality in Yosemite National Park, California. Environmental Monitoring and Assessment, 183: 197-215.

Clow, D.W., Sickman, J.O., Striegl, R.G., Krabbenhoft, D.P., Elliott, J.G., Dornblaser, M., Roth, D.A. and Campbell, D.H., 2003, Changes in the chemistry of lakes and precipitation in high-elevation national parks in the western United States, 1985-1999. Water Resources Research, 39(6), 1171, doi: 10.1019/2002WR001533.

Clow, D.W., Striegl, R.G., Nanus, L, Mast, M.A., Campbell, D.H., and Krabbenhoft, D.P., 2002, Chemistry of Selected High-Elevation Lakes in Seven National Parks in the Western United States, Water, Air, and Soil Pollution: Focus 2(2) 139-164. U.S. Geological Survey, Denver, CO.

Forrester, H., Clow, D., Roche, J., Heyvaert, A., and Battaglin, W., 2017, Effects of backpacker use, pack stock trail use, and pack stock grazing on water-quality indicators, including nutrients, E. coli, hormones, and pharmaceuticals, in Yosemite National Park, USA: Environmental Management, p. 1-18, doi: 10.1007/s00267-017-0899-z

Mast, M.A., D.A. Alvarez, and S.D. Zaugg, (2012), Deposition and accumulation of airborne organic contaminants in Yosemite National Park, California: Environmental Toxicology and Chemistry, Vol. 31, No. 3, pp. 524–533, 2012.


National Park Service Site:

Accessibility FOIA Privacy Policies and Notices logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Timothy D. Oden

November 13, 2017