Colin A Penn
Colin Penn is a Hydrologist in the New England Water Science Center.
Colin began his career with the USGS collecting high elevation stream and lake samples in wilderness areas of Colorado, and processing water and sediment samples for analysis. His field duties expanded to water quality sensor installations, meteorological station installations, snowpack sampling, and groundwater-level monitoring. As an hydrologist, Colin also works with local and national surface water and groundwater model output, and develops analysis scripts, packages, and web-browser dashboards with R statistical software.
Professional Experience
Hydrologist, U.S. Geological Survey, New England Water Science Center, 2023 to Present
Hydrologist, U.S. Geological Survey, Colorado Water Science Center, 2014 to 2023
Student Trainee (Hydrology), U.S. Geological Survey, Colorado Water Science Center, 2012 to 2014
Hydrologic Technician, U.S. Geological Survey, Colorado Water Science Center, 2010 to 2012
Research Assistant, Toolik Field Station, AK via University of Vermont, 2009
Research Assistant, UVM Rubenstein Ecosystem Science Lab and Dept. of Geography, 2008 to 2009
Seasonal Water Quality Intern, Connecticut Dept. of Energy and Environmental Protection, 2006 to 2007
Education and Certifications
M.S., Hydrology, Colorado School of Mines Hydrologic Science and Engineering Graduate Program, 2014
B.S., Environmental Sciences: Water Resources Concentration, Minor Statistics, University of Vermont Rubenstein School of Environment and Natural Resources, 2009
Science and Products
Rocky Mountain Regional Snowpack Chemistry Monitoring Study
Upper Rio Grande Basin Focus Area Study
Water, Energy, and Biogeochemical Budgets (WEBB): Loch Vale Watershed
Simulated growth potential of redband trout in the Donner und Blitzen River Basin, southeastern Oregon, using a bioenergetics model
NGWOS Ground Based Discrete Snowpack Measurements
Simulated streamflow and stream temperature in the Donner und Blitzen River Basin, southeastern Oregon, using the Precipitation-Runoff Modeling System (PRMS)
Daily streamflow performance benchmark defined by D-score (v0.1) for the National Hydrologic Model application of the Precipitation-Runoff Modeling System (v1 byObs Muskingum) at benchmark streamflow locations
Streamflow benchmark locations for hydrologic model evaluation within the conterminous United States (cobalt gages)
Model input and output for hydrologic simulations in the Rio Grande Headwaters, Colorado, using the Precipitation-Runoff Modeling System (PRMS)
Base flow estimation via optimal hydrograph separation at CONUS watersheds and comparison to the National Hydrologic Model - Precipitation-Runoff Modeling System by HRU calibrated version
Groundwater Watch - Colorado Active Water Level Network
The Active Groundwater Level Network contains water levels and well information from wells in Colorado
SnowModel simulations and supporting observations for the north-central Colorado Rocky Mountains during water years 2011 through 2015
Aquatic carbon export and dynamics in mountain headwater streams of the western U.S.
Northwest Forest Plan — The first 25 years (1994–2018): Watershed condition status and trends
Spatial variability in seasonal snowpack trends across the Rio Grande headwaters (1984 - 2017)
Groundwater levels in the Denver Basin bedrock aquifers of Douglas County, Colorado, 2011–19
Changes in climate and land cover affect seasonal streamflow forecasts in the Rio Grande headwaters
Estimation of base flow by optimal hydrograph separation for the conterminous United States and implications for national-extent hydrologic models
Groundwater-Level Elevations in the Denver Basin Bedrock Aquifers of Elbert County, Colorado, 2015–18
Snow sublimation in mountain environments and its sensitivity to forest disturbance and climate warming
Numerical experiments to explain multiscale hydrological responses to mountain pine beetle tree mortality in a headwater watershed
Water-quality response to a high-elevation wildfire in the Colorado Front Range
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.
U.S. Geological Survey Hydrologic Toolbox version 1.1.0 software archive
Precipitation Runoff Modeling System (PRMS)
The Precipitation-Runoff Modeling System is a deterministic, distributed-parameter, physical process based modeling system developed to evaluate the response of various combinations of climate and land use on streamflow and general watershed hydrology.
Hydrologic Model Evaluation and Time-Series Tools (HyMETT) R-package
Science and Products
Rocky Mountain Regional Snowpack Chemistry Monitoring Study
Upper Rio Grande Basin Focus Area Study
Water, Energy, and Biogeochemical Budgets (WEBB): Loch Vale Watershed
Simulated growth potential of redband trout in the Donner und Blitzen River Basin, southeastern Oregon, using a bioenergetics model
NGWOS Ground Based Discrete Snowpack Measurements
Simulated streamflow and stream temperature in the Donner und Blitzen River Basin, southeastern Oregon, using the Precipitation-Runoff Modeling System (PRMS)
Daily streamflow performance benchmark defined by D-score (v0.1) for the National Hydrologic Model application of the Precipitation-Runoff Modeling System (v1 byObs Muskingum) at benchmark streamflow locations
Streamflow benchmark locations for hydrologic model evaluation within the conterminous United States (cobalt gages)
Model input and output for hydrologic simulations in the Rio Grande Headwaters, Colorado, using the Precipitation-Runoff Modeling System (PRMS)
Base flow estimation via optimal hydrograph separation at CONUS watersheds and comparison to the National Hydrologic Model - Precipitation-Runoff Modeling System by HRU calibrated version
Groundwater Watch - Colorado Active Water Level Network
The Active Groundwater Level Network contains water levels and well information from wells in Colorado
SnowModel simulations and supporting observations for the north-central Colorado Rocky Mountains during water years 2011 through 2015
Aquatic carbon export and dynamics in mountain headwater streams of the western U.S.
Northwest Forest Plan — The first 25 years (1994–2018): Watershed condition status and trends
Spatial variability in seasonal snowpack trends across the Rio Grande headwaters (1984 - 2017)
Groundwater levels in the Denver Basin bedrock aquifers of Douglas County, Colorado, 2011–19
Changes in climate and land cover affect seasonal streamflow forecasts in the Rio Grande headwaters
Estimation of base flow by optimal hydrograph separation for the conterminous United States and implications for national-extent hydrologic models
Groundwater-Level Elevations in the Denver Basin Bedrock Aquifers of Elbert County, Colorado, 2015–18
Snow sublimation in mountain environments and its sensitivity to forest disturbance and climate warming
Numerical experiments to explain multiscale hydrological responses to mountain pine beetle tree mortality in a headwater watershed
Water-quality response to a high-elevation wildfire in the Colorado Front Range
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.
U.S. Geological Survey Hydrologic Toolbox version 1.1.0 software archive
Precipitation Runoff Modeling System (PRMS)
The Precipitation-Runoff Modeling System is a deterministic, distributed-parameter, physical process based modeling system developed to evaluate the response of various combinations of climate and land use on streamflow and general watershed hydrology.