Peter McCarthy
Science and Products
StreamStats: Streamflow Statistics and Spatial Analysis Tools for Water-Resources Applications
StreamStats provides access to spatial analytical tools that are useful for water-resources planning and management, and for engineering and design purposes. The map-based user interface can be used to delineate drainage areas, get basin characteristics and estimates of flow statistics, and more. Available information varies from state to state.
National Streamflow Statistics Program: Known Issues
The National Streamflow Statistics (NSS) Program compiles regression equations for estimating streamflow statistics for every state, Puerto Rico, and a number of metropolitan areas in the U.S. This page documents known issues with the NSS software program.
National Streamflow Statistics Program: Regional Regression Equation Publications by State or Territory
The National Streamflow Statistics (NSS) Program compiles regression equations for estimating streamflow statistics for every state, Puerto Rico, and a number of metropolitan areas in the U.S. This page documents known issues with the NSS software program.
National Streamflow Statistics Program: Version History
The National Streamflow Statistics (NSS) Program compiles regression equations for estimating streamflow statistics for every state, Puerto Rico, and a number of metropolitan areas in the U.S. This page documents updates made to the NSS software program and database.
StreamStats in Montana and Wyoming
StreamStats is a Web-based geographic information system application that provides users with access to basin and streamflow characteristics for gaged and ungaged streams.
Methods for peak-flow frequency analysis and reporting for streamgages in or near Montana based on data through water year 2015
This report documents the methods for peak-flow frequency (hereinafter “frequency”) analysis and reporting for streamgages in and near Montana following implementation of the Bulletin 17C guidelines. The methods are used to provide estimates of peak-flow quantiles for 50-, 42.9-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance...
Sando, Steven K.; McCarthy, Peter M.
Adjusted peak-flow frequency estimates for selected streamflow-gaging stations in or near Montana based on data through water year 2011: Chapter D in Montana StreamStats
The climatic conditions of the specific time period during which peak-flow data were collected at a given streamflow-gaging station (hereinafter referred to as gaging station) can substantially affect how well the peak-flow frequency (hereinafter referred to as frequency) results represent long-term hydrologic conditions. Differences in the timing...
Sando, Steven K.; Sando, Roy; McCarthy, Peter M.; Dutton, DeAnn M.
Methods for estimating peak-flow frequencies at ungaged sites in Montana based on data through water year 2011: Chapter F in Montana StreamStats
The U.S. Geological Survey (USGS), in cooperation with the Montana Department of Natural Resources and Conservation, completed a study to update methods for estimating peak-flow frequencies at ungaged sites in Montana based on peak-flow data at streamflow-gaging stations through water year 2011. The methods allow estimation of peak-flow...
Sando, Roy; Sando, Steven K.; McCarthy, Peter M.; Dutton, DeAnn M.
Methods for estimating streamflow characteristics at ungaged sites in western Montana based on data through water year 2009: Chapter G in Montana StreamStats
The U.S. Geological Survey, in cooperation with the Montana Department of Environmental Quality and the Montana Department of Natural Resources and Conservation, developed regional regression equations based on basin and streamflow characteristics for streamflow-gaging stations through water year 2009 that can be used to estimate streamflow...
McCarthy, Peter M.; Sando, Roy; Sando, Steven K.; Dutton, DeAnn M.
Montana StreamStats—A method for retrieving basin and streamflow characteristics in Montana: Chapter A in Montana StreamStats
The U.S. Geological Survey (USGS) provides streamflow characteristics and other related information needed by water-resource managers to protect people and property from floods, plan and manage water-resource activities, and protect water quality. Streamflow characteristics provided by the USGS, such as peak-flow and low-flow frequencies for...
McCarthy, Peter M.; Dutton, DeAnn M.; Sando, Steven K.; Sando, Roy
Peak-flow frequency analyses and results based on data through water year 2011 for selected streamflow-gaging stations in or near Montana: Chapter C in Montana StreamStats
Chapter C of this Scientific Investigations Report documents results from a study by the U.S. Geological Survey, in cooperation with the Montana Department of Transportation and the Montana Department of Natural Resources, to provide an update of statewide peak-flow frequency analyses and results for Montana. The purpose of this report chapter is...
Sando, Steven K.; McCarthy, Peter M.; Dutton, DeAnn M.
Streamflow characteristics based on data through water year 2009 for selected streamflow-gaging stations in or near Montana: Chapter E in Montana StreamStats
Chapter E of this Scientific Investigations Report documents results from a study by the U.S. Geological Survey, in cooperation with the Montana Department of Environmental Quality and the Montana Department of Natural Resources and Conservation, to provide an update of statewide streamflow characteristics based on data through water year 2009 for...
McCarthy, Peter M.
Temporal trends and stationarity in annual peak flow and peak-flow timing for selected long-term streamflow-gaging stations in or near Montana through water year 2011: Chapter B in Montana StreamStats
A large-scale study by the U.S. Geological Survey, in cooperation with the Montana Department of Transportation and the Montana Department of Natural Resources and Conservation, was done to investigate general patterns in peak-flow temporal trends and stationarity through water year 2011 for 24 long-term streamflow-gaging stations (hereinafter...
Sando, Steven K.; McCarthy, Peter M.; Sando, Roy; Dutton, DeAnn M.
Lateral and vertical channel movement and potential for bed-material movement on the Madison River downstream from Earthquake Lake, Montana
The 1959 Hebgen Lake earthquake caused a massive landslide (Madison Slide) that dammed the Madison River and formed Earthquake Lake. The U.S. Army Corps of Engineers excavated a spillway through the Madison Slide to permit outflow from Earthquake Lake. In June 1970, high streamflows on the Madison River severely eroded the spillway channel and...
Chase, Katherine J.; McCarthy, Peter M.
A digital model for planning water management at Benton Lake National Wildlife Refuge, west-central Montana
Benton Lake National Wildlife Refuge is an important area for waterfowl production and migratory stopover in west-central Montana. Eight wetland units covering about 5,600 acres are the essential features of the refuge. Water availability for the wetland units can be uncertain owing to the large natural variations in precipitation and runoff and...
Nimick, David A.; McCarthy, Peter M.; Fields, Vanessa
Travel Times, Streamflow Velocities, and Dispersion Rates in the Yellowstone River, Montana
The Yellowstone River is a vital natural resource to the residents of southeastern Montana and is a primary source of water for irrigation and recreation and the primary source of municipal water for several cities. The Yellowstone River valley is the primary east-west transportation corridor through southern Montana. This complex of...
McCarthy, Peter M.
Estimation of Streamflow Characteristics for Charles M. Russell National Wildlife Refuge, Northeastern Montana
Charles M. Russell National Wildlife Refuge (CMR) encompasses about 1.1 million acres (including Fort Peck Reservoir on the Missouri River) in northeastern Montana. To ensure that sufficient streamflow remains in the tributary streams to maintain the riparian corridors, the U.S. Fish and Wildlife Service is negotiating water-rights issues with the...
Sando, Steven K.; Morgan, Timothy J.; Dutton, DeAnn M.; McCarthy, Peter M.
National Streamflow Statistics Program (NSS)
The USGS develops regression equations for estimating streamflow statistics for every state, Puerto Rico, and a number of metropolitan areas in the U.S. These equations have been compiled into the National Streamflow Statistics (NSS) Program for design, planning, management, and regulatory purposes. These estimates are often needed at ungaged sites where no observed flow data are available....