Chris Holmquist-Johnson, PhD
Chris Holmquist-Johnson is a Hydrologist at the Fort Collins Science Center.
Science and Products
Water Management Studies
Small Unoccupied Aircraft System (sUAS) Flights
Orthoimagery, digital elevation, digital terrain, final surface, and vegetation classification models for four stream catchments in western Colorado 2016
Photogrammetric data collected by small unoccupied aircraft system for vegetation analysis at three study reaches along the Verde River, Arizona, December 2017
Orthoimagery and elevation data derived from UAS imagery for Palmyra Atoll, USA 2016 (ver. 1.1, November 2020)
Thermal infrared, multispectral, and photogrammetric data collected by drone for hydrogeologic analysis of the East River and Coal Creek beaver-impacted corridors near Crested Butte, Colorado
Thermal infrared and photogrammetric data collected by small unoccupied aircraft system for hydrogeologic analysis of Oh-be-joyful Creek, Gunnison National Forest, Colorado, August 2017
Predicting bird guilds using vegetation composition and structure on a wild and scenic river in Arizona
Efficient hydrogeological characterization of remote stream corridors using drones
Development of a decision support tool for water and resource management using biotic, abiotic, and hydrological assessments of Topock Marsh, Arizona
Experimental flights using a small unmanned aircraft system for mapping emergent sandbars
Evaluation of the Raven sUAS to detect and monitor greater sage-grouse leks within the Middle Park population
User's manual for the upper Delaware River riverine environmental flow decision support system (REFDSS), Version 1.1.2
Channel Maintenance and Flushing Flows for the Klamath River Below Iron Gate Dam, California
Relation between Streamflow of Swiftcurrent Creek, Montana, and the Geometry of Passage for Bull Trout (Salvelinus confluentus)
Rock ramp design guidelines
Qualitative evaluation of rock weir field performance and failure mechanisms
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.
Physical Habitat Simulation (PHABSIM) Software for Windows
The purpose of the Physical Habitat Simulation System (PHABSIM) is to simulate a relationship between streamflow and physical habitat for various life stages of a species of fish or a recreational activity.
Science and Products
Water Management Studies
Small Unoccupied Aircraft System (sUAS) Flights
Orthoimagery, digital elevation, digital terrain, final surface, and vegetation classification models for four stream catchments in western Colorado 2016
Photogrammetric data collected by small unoccupied aircraft system for vegetation analysis at three study reaches along the Verde River, Arizona, December 2017
Orthoimagery and elevation data derived from UAS imagery for Palmyra Atoll, USA 2016 (ver. 1.1, November 2020)
Thermal infrared, multispectral, and photogrammetric data collected by drone for hydrogeologic analysis of the East River and Coal Creek beaver-impacted corridors near Crested Butte, Colorado
Thermal infrared and photogrammetric data collected by small unoccupied aircraft system for hydrogeologic analysis of Oh-be-joyful Creek, Gunnison National Forest, Colorado, August 2017
Predicting bird guilds using vegetation composition and structure on a wild and scenic river in Arizona
Efficient hydrogeological characterization of remote stream corridors using drones
Development of a decision support tool for water and resource management using biotic, abiotic, and hydrological assessments of Topock Marsh, Arizona
Experimental flights using a small unmanned aircraft system for mapping emergent sandbars
Evaluation of the Raven sUAS to detect and monitor greater sage-grouse leks within the Middle Park population
User's manual for the upper Delaware River riverine environmental flow decision support system (REFDSS), Version 1.1.2
Channel Maintenance and Flushing Flows for the Klamath River Below Iron Gate Dam, California
Relation between Streamflow of Swiftcurrent Creek, Montana, and the Geometry of Passage for Bull Trout (Salvelinus confluentus)
Rock ramp design guidelines
Qualitative evaluation of rock weir field performance and failure mechanisms
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.
Physical Habitat Simulation (PHABSIM) Software for Windows
The purpose of the Physical Habitat Simulation System (PHABSIM) is to simulate a relationship between streamflow and physical habitat for various life stages of a species of fish or a recreational activity.