Effects of Packstock Use and Backpackers on Water Quality in Yosemite National Park, California

Harrison Forrester1, David W Clow2, James W Roche1 and Alan Heyvaert3, (1)Yosemite National Park, Division of Resources Management and Science, El Portal, CA, United States, (2)USGS Central Region Offices Denver, Denver, CO, United States, (3)Desert Research Institute Reno, Reno, NV, United States