Jonathan Friedman, PhD
Jonathan Friedman is a Hydrologist at the Fort Collins Science Center.
Since joining the Fort Collins Science Center in 1993, Jonathan has devoted his career to studying interactions among riparian vegetation, river flow and channel change. Present research topics include use of riparian tree rings to reconstruct past river flow, quantification of federal reserved water rights, and determination of the effect of riparian vegetation on bank stability.
Professional Experience
1993-present, Research Hydrologist, USGS Fort Collins Science Center, Fort Collins, CO
1990-1993, Hydrologist, USGS Water Resources Division, Lakewood, CO
1988-1990, Community College Instructor, Bellevue Community College, Olympic College and Front Range Community College, Washington and Colorado.
1988 Assistant Natural Area Scientist, Washington Natural Heritage Program, Olympia, Washington
Education and Certifications
Ph.D. Environmental, Population and Organismic Biology, University of Colorado, Boulder, 1993
M.S. Oceanography and Limnology, University of Wisconsin, Madison, 1987
B.S. Biology, Massachusetts Institute of Technology, 1983
Affiliations and Memberships*
Ecological Society of America
American Geophysical Union
Science and Products
Local environmental context conditions the impact of Russian olive in a heterogeneous riparian ecosystem
Use of 2H and 18O stable isotopes to investigate water sources for different ages of Populus euphratica along the lower Heihe River
Alternative standardization approaches to improving streamflow reconstructions with ring-width indices of riparian trees
Distribution of invasive and native riparian woody plants across the western USA in relation to climate, river flow, floodplain geometry and patterns of introduction
Processes limiting depth of arroyo incision: Examples from the Rio Puerco, New Mexico
Processes of arroyo filling in northern New Mexico, USA
Hybridization of an invasive shrub affects tolerance and resistance to defoliation by a biological control agent
Effects of woody vegetation on overbank sand transport during a large flood, Rio Puerco, New Mexico
Dendroclimatic potential of plains cottonwood (Populus deltoides subsp. monilifera) from the Northern Great Plains, USA
Effects of riparian vegetation on topographic change during a large flood event, Rio Puerco, New Mexico, USA
Long-term change along the Colorado River in Grand Canyon National Park (1889-2011)
Tree-ring records of variation in flow and channel geometry
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Local environmental context conditions the impact of Russian olive in a heterogeneous riparian ecosystem
Use of 2H and 18O stable isotopes to investigate water sources for different ages of Populus euphratica along the lower Heihe River
Alternative standardization approaches to improving streamflow reconstructions with ring-width indices of riparian trees
Distribution of invasive and native riparian woody plants across the western USA in relation to climate, river flow, floodplain geometry and patterns of introduction
Processes limiting depth of arroyo incision: Examples from the Rio Puerco, New Mexico
Processes of arroyo filling in northern New Mexico, USA
Hybridization of an invasive shrub affects tolerance and resistance to defoliation by a biological control agent
Effects of woody vegetation on overbank sand transport during a large flood, Rio Puerco, New Mexico
Dendroclimatic potential of plains cottonwood (Populus deltoides subsp. monilifera) from the Northern Great Plains, USA
Effects of riparian vegetation on topographic change during a large flood event, Rio Puerco, New Mexico, USA
Long-term change along the Colorado River in Grand Canyon National Park (1889-2011)
Tree-ring records of variation in flow and channel geometry
Non-USGS Publications**
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government