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Gregory Daniel Clark

Greg is a Hydrologist for the Wyoming-Montana Water Science Center focusing on water quality with a special interest in post-fire hydrology.

Greg attended Penn State in University Park, PA and worked as a technician for the USDA-ARS while completing his BSc. He assisted with collecting and analyzing soil, plant, and water samples originating from agricultural fields for various chemical and physical properties. He then attended Washington State University to complete his MSc. At WSU, Greg researched the impacts of frequent wildfires on soil-water-plant interactions on the southern face of Mount Adams in southwestern Washington State. 

Education and Certifications

  • Pennsylvania State University, BSc. Environmental Resource Management – Water Science

  • Washington State University, MSc. Environmental Science

Science and Products

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Clark Fork 4

Long-Term Surface-Water Monitoring in the Upper Clark Fork River Basin

The U.S. Geological Survey (USGS) has collected water-quality samples from selected stream sites upstream from Missoula since 1985.
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Wyoming-Montana Water Science Center
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Long-Term Surface-Water Monitoring in the Upper Clark Fork River Basin

The U.S. Geological Survey (USGS) has collected water-quality samples from selected stream sites upstream from Missoula since 1985.
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A call for strategic water-quality monitoring to advance assessment and prediction of wildfire impacts on water supplies

Wildfires pose a risk to water supplies in the western U.S. and many other parts of the world, due to the potential for degradation of water quality. However, a lack of adequate data hinders prediction and assessment of post-wildfire impacts and recovery. The dearth of such data is related to lack of funding for monitoring extreme events and the challenge of measuring the outsized hydrologic and e
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Water Resources Mission Area, California Water Science Center, Colorado Water Science Center, Kansas Water Science Center, New Mexico Water Science Center, Oregon Water Science Center, Oklahoma-Texas Water Science Center

Water-quality, bed-sediment, and invertebrate tissue trace-element concentrations for tributaries in the Clark Fork Basin, Montana, October 2019–September 2020

Water, bed sediment, and invertebrate tissue were sampled in streams from Butte to near Missoula, Montana, as part of a monitoring program in the Clark Fork Basin. The sampling program was completed by the U.S. Geological Survey, in cooperation with the U.S. Environmental Protection Agency, to characterize aquatic resources in the Clark Fork Basin and monitor trace elements associated with histori
By
Water Resources Mission Area, Wyoming-Montana Water Science Center

Water-quality, bed-sediment, and invertebrate tissue trace-element concentrations for tributaries in the Clark Fork Basin, Montana, October 2018–September 2019

Water, bed sediment, and invertebrate tissue were sampled in streams from Butte to near Missoula, Montana, as part of a monitoring program in the Clark Fork Basin. The sampling program was completed by the U.S. Geological Survey, in cooperation with the U.S. Environmental Protection Agency, to characterize aquatic resources in the Clark Fork Basin and monitor trace elements associated with histori
By
Water Resources Mission Area, Wyoming-Montana Water Science Center

Water-quality, bed-sediment, and invertebrate tissue trace-element concentrations for tributaries in the Clark Fork Basin, Montana, October 2017–September 2018

Water, bed sediment, and invertebrate tissue were sampled in streams from Butte to near Missoula, Montana, as part of a monitoring program in the Clark Fork Basin. The sampling program was completed by the U.S. Geological Survey, in cooperation with the U.S. Environmental Protection Agency, to characterize aquatic resources in the Clark Fork Basin and monitor trace elements associated with histori
By
Water Resources Mission Area, Wyoming-Montana Water Science Center

Non-USGS Publications**

GD Clark, KB Moffett (2018). Multiple wildfire disturbances amplify seasonal moisture stress in a moist, mixed-conifer montane ecosystem. Washington State University. Pullman, Washington.

**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