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National Streamflow Statistics Application: Regional Regression Equation Publications by State or Territory

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By Water Resources Mission Area February 26, 2019

The National Streamflow Statistics (NSS) Application compiles regression equations for estimating streamflow statistics for every state, Puerto Rico, and a number of metropolitan areas in the U.S. 

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Scroll down to see publications sorted by State or Territory.

The National Streamflow Statistics Application

  • T&M Chapter 6 of Book 4, The National Streamflow Statistics Program: A Computer Program for Estimating Streamflow Statistics for Ungaged Sites

Alabama

  • SIR 2020-032, Magnitude and Frequency of Floods in Alabama, 2015
  • SIR 2010-5012, Magnitude and frequency of floods for urban streams in Alabama, 2007
  • SIR 2007-5204, Magnitude and Frequency of Floods in Alabama, 2003
  • SIR 2004-5135, Magnitude and Frequency of Floods on Small Rural Streams in Alabama
  • WRIR 93-4186, Low-flow and flow-duration characteristics of Alabama streams

Alaska

  • SIR 2016-5024, Estimating flood magnitude and frequency at gaged and ungaged sites on streams in Alaska and conterminous basins in Canada, based on data through water year 2012
  • WRIR 96-4001, Evaluation of the Streamflow-Gaging Network of Alaska in Providing Regional Streamflow Information
  • WRIR 03-4114, Estimating annual high-flow statistics and monthly and seasonal low-flow statistics for ungaged sites on streams in Alaska and conterminous basins in Canada

American Samoa

  • WRIR 95-4185, Analysis of Streamflow Characteristics for Streams on the Island of Tutuila, American Samoa

Arizona

  • SIR 2014-5109, Methods for estimating magnitude and frequency of 1-, 3-, 7-, 15-, and 30-day flood-duration flows in Arizona
  • SIR 2014-5211, Methods for estimating magnitude and frequency of floods in Arizona, developed with unregulated and rural peak-flow data through water year 2010
  • SIR 2006-5306, Analysis of the Magnitude and Frequency of Peak Discharges for the Navajo Nation in Arizona, Utah, Colorado, and New Mexico

Arkansas

  • SIR 2016-5081, Methods for estimating annual exceedance probability discharges for streams in Arkansas, based on data through water year 2013
  • SIR 2015-5031, Dry Season Mean Monthly Flow and Harmonic Mean Flow Regression Equations for Selected Ungaged Basins in Arkansas
  • SIR 2008-5065, Low-Flow Characteristics and Regionalization of Low-Flow Characteristics for Selected Streams in Arkansas
  • WRIR 93-4013, Regionalization of low-flow characteristics of Arkansas streams
  • WRIR 92-4026, Flow duration and low-flow characteristics of selected Arkansas streams
  • WRIR 85-4150, Floodflow Frequency of Streams in the Alluvial Plain of the Lower Mississippi River in Mississippi, Arkansas, and Louisiana

California

  • SIR 2012-5113, Methods for Determining Magnitude and Frequency of Floods in California, Based on Data through Water Year 2006
  • WSP 2433 (1997), Methods for Estimating Magnitude and Frequency of Floods in the Southwestern United States

Colorado

  • SIR 2016-5099, Paleoflood investigations to improve peak-streamflow regional-regression equations for natural streamflow in eastern Colorado
  • SIR 2009-5136, Regional Regression Equations for Estimation of Natural Streamflow Statistics in Colorado
  • SIR 2006-5306, Analysis of the Magnitude and Frequency of Peak Discharges for the Navajo Nation in Arizona, Utah, Colorado, and New Mexico
  • WSP 2433 (1997), Methods for Estimating Magnitude and Frequency of Floods in the Southwestern United States
  • WRIR 85-4086, Estimation of Natural Streamflow Characteristics in Western Colorado

Connecticut

  • SIR 2020-5054, Estimating Flood Magnitude and Frequency on Streams and Rivers in Connecticut, Based on Data Through Water Year 2015
  • SIR 2010-5052, Regional Regression Equations to Estimate Flow-Duration Statistics at Ungaged Stream Sites in Connecticut
  • SIR 2004-5160, Regression Equations for Estimating Flood Flows for the 2-, 10-, 25-, 50-, 100-, and 500-year Recurrence Intervals in Connecticut
  • WRIR 89-4167, Effects of Urbanization on Peak Streamflows in Four Connecticut Communities, 1980-84

Delaware

  • SIR 2022-5005, Peak-Flow and Low-Flow Magnitude Estimates at Defined Frequencies and Durations for Nontidal Streams in Delaware
  • SIR 2006-5146, Magnitude and Frequency of Floods on Nontidal Streams in Delaware
  • WRIR 94-4020, Low-Flow Characteristics of Streams in Maryland and Delaware

Florida

  • SIR 2011-5034, Magnitude and Frequency of Floods for Rural Streams in Florida, 2006
  • WRIR 96-4124, Methods for Estimating Low-Flow Characteristics of Ungaged Streams in Selected Areas, Northern Florida (Abstract only)
  • WRIR 93-4165, Low-flow characteristics of Florida streams
  • WRIR 84-4004, Magnitude and Frequency of Floods from Urban Streams in Leon County, Florida
  • WRIR 83-4107, Selected flow characteristics of Florida streams and canals
  • WRIR 82-42, Magnitude and Frequency of Flooding on Small Urban Watersheds in the Tampa Bay Area, West-Central Florida (Abstract only)

Georgia

  • SIR 2023-5065, Effects of Impoundments on Selected Flood-Frequency and Daily Mean Streamflow Characteristics in Georgia, South Carolina, and North Carolina
  • SIR 2023-5006, Magnitude and Frequency of Floods for Rural Streams in Georgia, South Carolina, and North Carolina, 2017—Results
  • SIR 2017-5001, Methods for estimating selected low-flow frequency statistics and mean annual flow for ungaged locations on streams in North Georgia
  • SIR 2014-5030, Methods for Estimating the Magnitude and Frequency of Floods for Urban and Small, Rural Streams in Georgia, South Carolina, and North Carolina, 2011
  • SIR 2011-5042, Magnitude and Frequency of Floods for Urban and Small Rural Streams in Georgia, 2008
  • SIR 2009-5043, Magnitude and Frequency of Rural Floods in the Southeastern United States, 2006: Volume 1, Georgia
  • WRIR 00-4049, Lagtime Relations for Urban Streams in Georgia
  • WSP 2317 (1987), Simulation of flood hydrographs for Georgia streams
  • OFR 82-560, Monthly low-flow characteristics of Georgia streams (Abstract only)

Hawaii

  • SIR 2023-5014, Magnitude and Frequency of Floods on Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi, Based on Data through Water Year 2020
  • SIR 2010-5035, Flood-Frequency Estimates for Streams on Kaua'i, O'ahu, Moloka'i, Maui, and Hawai'i, State of Hawai'i
  • SIR 2004-5262, Median and Low-Flow Characteristics for Streams Under Natural and Diverted Conditions, Northeast Maui, Hawaii
  • WRIR 95-4185, Analysis of streamflow characteristics for streams on the island of Tutuila, American Samoa
  • WRIR 94-4052, Estimation of Magnitude and Frequency of Floods for Streams on the Island of Oahu, Hawaii (Abstract only)
  • WRIR 92-4099, Estimation of Median Streamflows at Perennial Stream Sites in Hawaii
  • OFR 72-453, Evaluation of the streamflow-data program in Hawaii

Idaho

  • SIR 2016-5083, Estimating peak-flow frequency statistics for selected gaged and ungaged sites in naturally flowing streams and rivers in Idaho
  • SIR 2006-5035, Estimating Low-Flow Frequency Statistics for Unregulated Streams in Idaho
  • WRIR 01-4093, Estimating Monthly and Annual Streamflow Statistics at Ungaged Sites in Idaho

Illinois

  • Research Report FHWA-ICT-23-014, Estimating Peak-flow Quantiles for Selected Annual Exceedance Probabilities in Illinois
  • SIR 2016-5050, Estimation of peak discharge quantiles for selected annual exceedance probabilities in northeastern Illinois
  • SIR 2014-5177, Estimation of Regional Flow-Duration Curves for Indiana and Illinois
  • SIR 2004-5103, Estimating Flood-Peak Discharge Magnitudes and Frequencies for Rural Streams in Illinois
  • WRIR 87-4207, Technique for Estimating Flood-Peak Discharges and Frequencies on Rural Streams in Illinois

Indiana

  • SIR 2016-5102, Estimating selected low-flow frequency statistics and harmonic-mean flows for ungaged, unregulated streams in Indiana (ver 1.1, October 2016)
  • SIR 2014-5177, Estimation of Regional Flow-Duration Curves for Indiana and Illinois
  • SIR 2013-5078, Regional Bankfull-Channel Dimensions of Non-Urban Wadeable Streams in Indiana
  • FHWA/IN/JTRP 2005/18 (2006), Flood-Frequency Relationships for Indiana
  • WSP 2372 (1991), Methods for Estimating Low-Flow Characteristics of Ungaged Streams in Indiana
  • WRIR 84-4134, Techniques for Estimating Magnitude and Frequency of Floods on Streams in Indiana

Iowa

  • SIR 2016-5111, Methods for estimating selected spring and fall low-flow frequency statistics for ungaged stream sites in Iowa, based on data through June 2014
  • SIR 2015-5055, Comparisons of estimates of annual exceedance-probability discharges for small drainage basins in Iowa, based on data through water year 2013
  • SIR 2013-5086, Methods for Estimating Annual Exceedance-Probability Discharges for Streams in Iowa, Based on Data through Water Year 2010
  • SIR 2012-5232, Computing Daily Mean Streamflow at Ungaged Locations in Iowa by using the Flow Anywhere and Flow Duration Curve Transfer Statistical Methods
  • SIR 2012-5171, Methods for Estimating Selected Low-Flow Frequency Statistics and Harmonic Mean Flows for Streams in Iowa

Kansas

  • SIR 2021-5100, Methods for Estimating Low-Flow Frequency Statistics, Mean Monthly and Annual Flow, and Flow-Duration Curves for Ungaged Locations in Kansas
  • SIR 2017-5063, Methods for estimating annual exceedance-probability streamflows for streams in Kansas based on data through water year 2015
  • WRIR 00-4079, Estimation of Peak Streamflows for Unregulated Streams in Kansas
  • SIR 2004-5032, Estimates of Median Flows for Streams on the 1999 Kansas Surface Water Register
  • WRIR 01-4142, Estimated Flow-Duration Curves for Selected Ungaged Sites in Kansas
  • WRIR 00-4113, Estimated Flow-Duration Curves for Selected Ungaged Sites in the Cimarron and Lower Arkansas River Basins in Kansas
  • OFR 80-734, Multiyear Low Flow of Streams in Northeastern Kansas
  • OFR 79-1288, Multiyear Low Flow in Southeastern Kansas

Kentucky

  • SIR 2010-5217, Methods for Estimating Selected Low-Flow Frequency Statistics for Unregulated Streams in Kentucky
  • JAWRA v.48 no.2, Bankfull regional curves for the Inner and Outer Bluegrass Regions of Kentucky, Journal of the American Water Resources Association
  • WRIR 03-4180, Estimating the Magnitude of Peak Flows for Streams in Kentucky for Selected Recurrence Intervals
  • WRIR 02-4206, Estimating Mean Annual Streamflow of Rural Streams in Kentucky
  • WRIR 97-4219, Estimation of Peak-Discharge Frequency of Urban Streams in Jefferson County, Kentucky
  • WRIR 92-4173, Regionalization of harmonic-mean streamflows in Kentucky

Louisiana

  • SIR 2024-5031, Magnitude and Frequency of Floods in the Coastal Plain Region of Louisiana, 2016
  • TR No. 60, (1998) Floods in Louisiana, Magnitude and Frequency, Fifth Edition
  • WRIR 85-4150, Floodflow Frequency of Streams in the Alluvial Plain of the Lower Mississippi River in Mississippi, Arkansas, and Louisiana
  • Research Study No. 65-2H, Magnitude and Frequency of Floods for Small Watersheds in Louisiana
  • OFR 78-218, Study to Determine Discharge at 50-percent Flow Duration and Ordinary High Water for Streams in Louisiana

Maine

  • River Research Applications Volume 37 Issue 9 2021, Model estimated baseflow for streams with endangered Atlantic Salmon in Maine, USA
  • SIR 2020-5092, Estimating Flood Magnitude and Frequency on Gaged and Ungaged Streams in Maine
  • SIR 2015-5151, Regression Equations for Monthly and Annual Mean and Selected Percentile Streamflows for Ungaged Rivers in Maine
  • SIR 2015-5049, Peak Flow Regression Equations for Small, Ungaged Streams in Maine: Comparing Map-Based to Field-Based Variables
  • SIR 2010-5179, June and August Median Streamflows Estimated for Ungaged Streams in Southern Maine
  • SIR 2004-5042, Hydraulic-Geometry Relations for Rivers in Coastal and Central Maine
  • SIR 2004-5157, August Median Streamflow on Ungaged Streams in Eastern Coastal Maine
  • SIR 2004-5026, Estimating Monthly, Annual, and Low 7-Day, 10-year Streamflows for Ungaged Rivers in Maine
  • WRIR 03-4225, August Median Streamflow on Ungaged Streams in Eastern Aroostook County, Maine
  • WRIR 99-4008, Estimating the Magnitude of Peak Flows for Streams in Maine for Selected Recurrence Intervals

Maryland/District of Columbia

  • SIR 2005-5147, Development of Regional Curves Relating Bankfull-Channel Geometry and Discharge to Drainage Area for Streams in Pennsylvania and Selected Areas of Maryland
  • AHMMD 2010, Application of Hydrologic Methods in Maryland, Third Edition, September 2010, Appendix 3: Fixed Region Regression Equations For Maryland
  • WRIR 95-4154, Technique for Estimating Magnitude and Frequency of Peak Flows in Maryland
  • WRIR 94-4020, Low-Flow Characteristics of Streams in Maryland and Delaware (Abstract only)

Massachusetts

Michigan

  • WRIR 84-4207, Statistical Methods for Estimating Flow Characteristics of Michigan Streams (Abstract only)

Minnesota

  • SIR 2023-5079, Techniques for Estimating the Magnitude and Frequency of Peak Flows on Small Streams in Minnesota, Excluding the Rainy River Basin, Based on Data Through Water Year 2019
  • SIR 2015-5170, Methods for estimating flow-duration curve and low-flow frequency statistics for ungaged locations on small streams in Minnesota
  • SIR 2009-5250, Techniques for Estimating the Magnitude and Frequency of Peak Flows on Small Streams in Minnesota Based on Data through Water Year 2005

Mississippi

  • SIR 2021-5046, Magnitude and Frequency of Floods in the Alluvial Plain of the Lower Mississippi River, 2017
  • SIR 2018-5148, Flood Frequency of Rural Streams in Mississippi, 2013
  • WRIR 91-4037, Flood Characteristics of Mississippi Streams

Missouri

  • SIR 2014-5165, Methods for Estimating Annual Exceedance-Probability Discharges and Largest Recorded Floods for Unregulated Streams in Rural Missouri
  • SIR 2013-5090, Computed Statistics at Streamgages, and Methods for Estimating Low-Flow Frequency Statistics and Development of Regional Regression Equations for Estimating Low-Flow Frequency Statistics at Ungaged Locations in Missouri
  • SIR 2010-5073, Estimation of the Magnitude and Frequency of Floods in Urban Basins in Missouri

Montana

  • SIR 2020-5142, Regional Regression Equations Based on Channel-Width Characteristics to Estimate Peak-Flow Frequencies at Ungaged Sites in Montana Using Peak-Flow Frequency Data through Water Year 2011
  • WRIR 2015-5019, Montana StreamStats
  • WRIR 03-4308, Methods for Estimating Flood Frequency in Montana Based on Data through Water Year 1998
  • WSP 2365, Methods for estimating monthly streamflow characteristics at ungaged sites in western Montana
  • WRIR 85-4071, A Method for Estimating Mean and Low Flows of Streams in National Forests of Montana

Nebraska

  • WRIR 99-4032, Peak-Flow Frequency Relations and Evaluation of the Peak-Flow Gaging Network in Nebraska

Nevada

  • WSP 2433 (1997), Methods for Estimating Magnitude and Frequency of Floods in the Southwestern United States

New Hampshire

  • SIR 2004-5019, Generalized Estimates from Streamflow Data of Annual and Seasonal Ground-Water-Recharge Rates for Drainage Basins in New Hampshire
  • SIR 2008-5206, Estimation of Flood Discharges at Selected Recurrence Intervals for Streams in New Hampshire
  • WRIR 02-4298, Development of Regression Equations to Estimate Flow Durations and Low-Flow-Frequency Statistics in New Hampshire Streams

New Jersey

  • SIR 2014-5004, Regional regression equations for the estimation of selected monthly low-flow duration and frequency statistics at ungaged sites on streams in New Jersey
  • SIR 2009-5167, Methodology for Estimation of Flood Magnitude and Frequency for New Jersey Streams
  • NJ SR No. 38 (1974), Magnitude and frequency of floods in New Jersey with affects of urbanization

New Mexico

  • SIR 2023-5058, Regression Equations for Estimating the 4-Day, 3-Year Low-Flow Frequency and Adjusted Harmonic Mean Streamflow at Ungaged Sites for Unregulated, Perennial Streams in New Mexico
  • SIR 2008-5119, Analysis of the Magnitude and Frequency of Peak Discharge and Maximum Observed Peak Discharge in New Mexico and Surrounding Areas
  • SIR 2006-5306, Analysis of the Magnitude and Frequency of Peak Discharges for the Navajo Nation in Arizona, Utah, Colorado, and New Mexico
  • WRIR 01-4271, Analysis of the Magnitude and Frequency of the 4-day, 3-year Annual Low Flow on Unregulated Streams in New Mexico
  • WRIR 96-4112, Analysis of the Magnitude and Frequency of Peak Discharge and Maximum Observed Peak Discharge in New Mexico (Abstract only)
  • WSP 2433 (1997), Methods for Estimating Magnitude and Frequency of Floods in the Southwestern United States

New York

  • SIR 2014-5220, Estimation of unaltered daily mean streamflow at ungaged streams of New York, excluding Long Island, water years 1961–2010
  • SIR 2010-5063, Low flow of streams in the Susquehanna River basin of New York
  • SIR 2009-5144, Bankfull Discharge and Channel Characteristics of Streams in New York State
  • SIR 2006-5112, Magnitude and Frequency of Floods in New York
  • WRIR 85-4070, Method for estimating low-flow statistics for ungaged streams in the Lower Hudson River Basin, New York
  • WRIR 84-4350, Evaluation of Six Methods for Estimating Magnitude and Frequency of Peak Discharges on Urban Streams in New York

North Carolina

  • SIR 2023-5065, Effects of Impoundments on Selected Flood-Frequency and Daily Mean Streamflow Characteristics in Georgia, South Carolina, and North Carolina
  • SIR 2023-5006, Magnitude and Frequency of Floods for Rural Streams in Georgia, South Carolina, and North Carolina, 2017—Results 
  • SIR 2014-5030, Methods for Estimating the Magnitude and Frequency of Floods for Urban and Small, Rural Streams in Georgia, South Carolina, and North Carolina, 2011
  • SIR 2009-5158, Magnitude and Frequency of Rural Floods in the Southeastern United States, through 2006: Volume 2, North Carolina
  • WRIR 96-4084, Estimation of Flood-Frequency Characteristics of Small Urban Streams in North Carolina

North Dakota

  • SIR 2015-5096, Regional regression equations to estimate peak-flow frequency at sites in North Dakota using data through 2009

Ohio

  • SIR 2019-5018, Flood-Frequency Estimates for Ohio Streamgages Based on Data through Water Year 2015 and Techniques for Estimating Flood-Frequency Characteristics of Rural, Unregulated Ohio Streams
  • SIR 2012-5138, Methods for estimating selected low-flow statistics and development of annual flow-duration statistics for Ohio
  • SIR 2006-5312, A Streamflow Statistics (StreamStats) Web Application for Ohio (includes peak flow equations updated from WRIR 03-4164)
  • WRIR 02-4068, Techniques for Estimating Selected Streamflow Characteristics of Rural, Unregulated Streams in Ohio
  • WSP 2432 (1994), Estimation of Peak-Frequency Relations, Flood Hydrographs, and Volume-Duration-Frequency Relations of Ungaged Small Urban Streams in Ohio
  • WRIR 86-4354, Multiple-regression Equations for Estimating Low Flows at Ungaged Stream Sites in Ohio

Oklahoma

  • SIR 2019-5143, Methods for Estimating the Magnitude and Frequency of Peak Streamflows for Unregulated Streams in Oklahoma Developed by Using Streamflow Data Through 2017
  • SIR 2015-5134, Methods for estimating the magnitude and frequency of peak streamflows at ungaged sites in and near the Oklahoma Panhandle
  • SIR 2010-5137, Methods for Estimating the Magnitude and Frequency of Peak Streamflows for Unregulated Streams in Oklahoma
  • SIR 2009-5267, Methods for Estimating Flow-Duration and Annual Mean-Flow Statistics for Ungaged Streams in Oklahoma
  • WRIR 97-4202, Techniques for Estimating Peak-Streamflow Frequency for Unregulated Streams and Streams Regulated by Small Floodwater-Retarding Structures in Oklahoma

Oregon

  • SIR 2008-5126, Estimating Flow-Duration and Low-Flow Frequency Statistics for Unregulated Streams in Oregon
  • SIR 2005-5116, Estimation of Peak Discharges for Rural, Unregulated Streams in Western Oregon
  • WSP 2433 (1997), Methods for Estimating Magnitude and Frequency of Floods in the Southwestern United States
  • WRIR 82-4078, Magnitude and Frequency in Floods in Eastern Oregon
  • OFR 80-689, Storm Runoff as Related to Urbanization in the Portland, Oregon - Vancouver, Washington Area (Abstract only)
  • OFR 70-203, Evaluation of the streamflow-data program in Oregon

Pennsylvania

  • SIR 2019-5094, Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania
  • SIR 2018-5066, Comparison of regression relations of bankfull discharge and channel geometry for the glaciated and nonglaciated settings of Pennsylvania and southern New York
  • SIR 2005-5147, Development of Regional Curves Relating Bankfull-Channel Geometry and Discharge to Drainage Area for Streams in Pennsylvania and Selected Areas of Maryland
  • SIR 2012-5142, Estimation of Baseline Daily Mean Streamflows for Ungaged Locations on Pennsylvania Streams, Water Years 1960–2008
  • SIR 2008-5102, Regression Equations for Estimating Flood Flows at Selected Recurrence Intervals for Ungaged Streams in Pennsylvania
  • SIR 2006-5130, Low-Flow, Base-Flow, and Mean-Flow Regression Equations for Pennsylvania Streams

Puerto Rico

  • SIR 2021-5062, Development of Regression Equations for the Estimation of the Magnitude and Frequency of Floods at Rural, Unregulated Gaged and Ungaged Streams in Puerto Rico Through Water Year 2017
  • SIR 2021-5054, Estimating Flow-Duration Statistics and Low-Flow Frequencies for Selected Streams and the Implementation of a StreamStats Web-Based Tool in Puerto Rico
  • WRIR 99-4142, Estimation of Magnitude and Frequency of Floods for Streams in Puerto Rico: New Empirical Models

Rainy River Basin

  • SIR 2019-5012, Techniques for Estimating the Magnitude and Frequency of Peak Flows on Small Streams in the Binational U.S. and Canadian Lake of the Woods–Rainy River Basin Upstream from Kenora, Ontario, Canada, Based on Data through Water Year 2013

Rhode Island

  • SIR 2014-5010, Equations for Estimating Selected Streamflow Statistics in Rhode Island
  • SIR 2012-5109, Magnitude of Flood Flows for Selected Annual-Exceedance Probabilities in Rhode Island, through 2010, Version 1.1

South Carolina

  • SIR 2023-5065, Effects of Impoundments on Selected Flood-Frequency and Daily Mean Streamflow Characteristics in Georgia, South Carolina, and North Carolina
  • SIR 2023-5006, Magnitude and Frequency of Floods for Rural Streams in Georgia, South Carolina, and North Carolina, 2017—Results 
  • SIR 2014-5030, Methods for Estimating the Magnitude and Frequency of Floods for Urban and Small, Rural Streams in Georgia, South Carolina, and North Carolina, 2011
  • SIR 2009-5156, Magnitude and Frequency of Rural Floods in the Southeastern United States, 2006: Volume 3, South Carolina
  • SIR 2004-5030, Estimating the Magnitude and Frequency of Floods in Small Urban Streams in South Carolina, 2001

South Dakota

  • WRIR 98-4055, A Method for Estimating Magnitude and Frequency of Floods in South Dakota

Tennessee

  • SIR 2009-5159, Streamflow-Characteristic Estimation Methods for Unregulated Streams of Tennessee
  • WRIR 03-4176, Flood-Frequency Prediction Methods for Unregulated Streams of Tennessee, 2000
  • WRIR 84-4110, Flood Frequency and Storm Runoff of Urban Areas of Memphis and Shelby County, Tennessee
  • WRIR 84-4182, Synthesized Flood Frequency of Small Urban Streams in Tennessee

Texas

  • SIR 2009-5087, Regression Equations for Estimation of Annual Peak-Streamflow Frequency for Undeveloped Watersheds in Texas Using an L-moment-Based, PRESS-Minimized, Residual-Adjusted Approach
  • WRIR 01-4243, Effects of Regulation on L-moments of Annual Peak Streamflow in Texas
  • WRIR 2000-4064, Regional equations for estimating mean annual and mean seasonal runoff for natural basins in Texas, base period 1961-90
  • WRIR 98-4015, Peak-Flow Frequency of Tributaries of the Colorado River Downstream of Austin, Texas
  • WRIR 98-4178, Peak-Discharge Frequency and Potential Extreme Peak Discharge for Natural Streams in the Brazos River Basin, Texas
  • WRIR 96-4072, Peak-Flow Frequency and Extreme Flood Potential for Streams in the Vicinity of the Highland Lakes, Central, Texas
  • WRIR 86-4069, The Effects of Urbanization on Floods in the Austin Metropolitan Area, Texas
  • WRIR 82-18, Techniques for Estimating the Magnitude and Frequency of Floods in the Dallas-Fort Worth Metropolitan Area, Texas
  • WRIR 80-17, Technique for Estimating the Magnitude and Frequency fo Floods in the Houston, Texas, Metropolitan Area

Utah

  • SIR 2008-5230, Methods for Estimating Monthly and Annual Streamflow Statistics at Ungaged Sties in Utah
  • SIR 2007-5158, Methods for Estimating Magnitude and Frequency of Peak Flows for Natural Streams in Utah
  • SIR 2006-5306, Analysis of the Magnitude and Frequency of Peak Discharges for the Navajo Nation in Arizona, Utah, Colorado, and New Mexico

Vermont

  • SIR 2006-5217, A logistic regression equation for estimating the probability of a stream in Vermont having intermittent flow
  • SIR 2014-5078, Estimation of Flood Discharges at Selected Annual Exceedance Probabilities for Unregulated, Rural Streams in Vermont
  • WRIR 02-4238, Flow-frequency characteristics of Vermont streams

Virginia

  • SIR 2014-5090, Methods and equations for estimating peak streamflow per square mile in Virginia’s urban basins
  • SIR 2011-5144, Peak-Flow Characteristics of Virginia Streams
  • SIR 2011-5143, Low-Flow Characteristics of Virginia Streams

Washington

  • SIR 2016-5118, Magnitude, frequency, and trends of floods at gaged and ungaged sites in Washington, based on data through water year 2014 (ver 1.1, October 2016)
  • SIR 2012-5078, Analysis of Low Flows and Selected Methods for Estimating Low-Flow Characteristics at Partial-Record and Ungaged Stream Sites in Western Washington
  • SIR 2009-5170, Estimating Low-Flow Frequency Statistics and Hydrologic Analysis of Selected Streamflow-Gaging Stations, Nooksack River Basin, Northwestern Washington and Canada
  • OFR 80-689, Storm Runoff as Related to Urbanization in the Portland, Oregon - Vancouver, Washington Area (Abstract only)

West Virginia

  • SIR 2010-5185, Estimation of Selected Seasonal Streamflow Statistics Representative of 1930–2002 in West Virginia
  • SIR 2010-5033, Estimation of Flood-Frequency Discharges for Rural, Unregulated Streams in West Virginia
  • SIR 2008-5105, Estimating Selected Streamflow Statistics Representative of 1930-2002 in West Virginia
  • WRIR 87-4111, Techniques for estimating flood depth frequency relations for streams in West Virginia

Wisconsin

  • WRIR 03-4250, Flood-Frequency Characteristics of Wisconsin Streams
  • WRIR 86-4005, Estimating Magnitude and Frequency of Floods for Wisconsin Urban Streams

Wyoming

  • WRIR 03-4107, Peak-Flow Characteristics of Wyoming Streams
     

National Streamflow Statistics (NSS) Application

The National Streamflow Statistics (NSS) Application is an online computer application that provides a simple method for applying regional flood-peak streamflow estimates and low flow frequency/duration streamflow estimates.
By
Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center, StreamStats

National Streamflow Statistics (NSS) Application - Formerly NSS Program

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) Application for design, planning, management, and regulatory purposes. These estimates are often needed at ungaged sites where no observed flow data are available.

By
Water Resources Mission Area, StreamStats

National Streamflow Statistics (NSS) Services

Provides U.S. Geological Survey developed and published regression equations for estimating streamflow statistics such as mean annual and monthly mean flows, flow-duration percentiles, and peak and low flows.
By
Upper Midwest Environmental Sciences Center

The National Streamflow Statistics (NSS) Application compiles regression equations for estimating streamflow statistics for every state, Puerto Rico, and a number of metropolitan areas in the U.S. 

Visit Application

Scroll down to see publications sorted by State or Territory.

The National Streamflow Statistics Application

  • T&M Chapter 6 of Book 4, The National Streamflow Statistics Program: A Computer Program for Estimating Streamflow Statistics for Ungaged Sites

Alabama

  • SIR 2020-032, Magnitude and Frequency of Floods in Alabama, 2015
  • SIR 2010-5012, Magnitude and frequency of floods for urban streams in Alabama, 2007
  • SIR 2007-5204, Magnitude and Frequency of Floods in Alabama, 2003
  • SIR 2004-5135, Magnitude and Frequency of Floods on Small Rural Streams in Alabama
  • WRIR 93-4186, Low-flow and flow-duration characteristics of Alabama streams

Alaska

  • SIR 2016-5024, Estimating flood magnitude and frequency at gaged and ungaged sites on streams in Alaska and conterminous basins in Canada, based on data through water year 2012
  • WRIR 96-4001, Evaluation of the Streamflow-Gaging Network of Alaska in Providing Regional Streamflow Information
  • WRIR 03-4114, Estimating annual high-flow statistics and monthly and seasonal low-flow statistics for ungaged sites on streams in Alaska and conterminous basins in Canada

American Samoa

  • WRIR 95-4185, Analysis of Streamflow Characteristics for Streams on the Island of Tutuila, American Samoa

Arizona

  • SIR 2014-5109, Methods for estimating magnitude and frequency of 1-, 3-, 7-, 15-, and 30-day flood-duration flows in Arizona
  • SIR 2014-5211, Methods for estimating magnitude and frequency of floods in Arizona, developed with unregulated and rural peak-flow data through water year 2010
  • SIR 2006-5306, Analysis of the Magnitude and Frequency of Peak Discharges for the Navajo Nation in Arizona, Utah, Colorado, and New Mexico

Arkansas

  • SIR 2016-5081, Methods for estimating annual exceedance probability discharges for streams in Arkansas, based on data through water year 2013
  • SIR 2015-5031, Dry Season Mean Monthly Flow and Harmonic Mean Flow Regression Equations for Selected Ungaged Basins in Arkansas
  • SIR 2008-5065, Low-Flow Characteristics and Regionalization of Low-Flow Characteristics for Selected Streams in Arkansas
  • WRIR 93-4013, Regionalization of low-flow characteristics of Arkansas streams
  • WRIR 92-4026, Flow duration and low-flow characteristics of selected Arkansas streams
  • WRIR 85-4150, Floodflow Frequency of Streams in the Alluvial Plain of the Lower Mississippi River in Mississippi, Arkansas, and Louisiana

California

  • SIR 2012-5113, Methods for Determining Magnitude and Frequency of Floods in California, Based on Data through Water Year 2006
  • WSP 2433 (1997), Methods for Estimating Magnitude and Frequency of Floods in the Southwestern United States

Colorado

  • SIR 2016-5099, Paleoflood investigations to improve peak-streamflow regional-regression equations for natural streamflow in eastern Colorado
  • SIR 2009-5136, Regional Regression Equations for Estimation of Natural Streamflow Statistics in Colorado
  • SIR 2006-5306, Analysis of the Magnitude and Frequency of Peak Discharges for the Navajo Nation in Arizona, Utah, Colorado, and New Mexico
  • WSP 2433 (1997), Methods for Estimating Magnitude and Frequency of Floods in the Southwestern United States
  • WRIR 85-4086, Estimation of Natural Streamflow Characteristics in Western Colorado

Connecticut

  • SIR 2020-5054, Estimating Flood Magnitude and Frequency on Streams and Rivers in Connecticut, Based on Data Through Water Year 2015
  • SIR 2010-5052, Regional Regression Equations to Estimate Flow-Duration Statistics at Ungaged Stream Sites in Connecticut
  • SIR 2004-5160, Regression Equations for Estimating Flood Flows for the 2-, 10-, 25-, 50-, 100-, and 500-year Recurrence Intervals in Connecticut
  • WRIR 89-4167, Effects of Urbanization on Peak Streamflows in Four Connecticut Communities, 1980-84

Delaware

  • SIR 2022-5005, Peak-Flow and Low-Flow Magnitude Estimates at Defined Frequencies and Durations for Nontidal Streams in Delaware
  • SIR 2006-5146, Magnitude and Frequency of Floods on Nontidal Streams in Delaware
  • WRIR 94-4020, Low-Flow Characteristics of Streams in Maryland and Delaware

Florida

  • SIR 2011-5034, Magnitude and Frequency of Floods for Rural Streams in Florida, 2006
  • WRIR 96-4124, Methods for Estimating Low-Flow Characteristics of Ungaged Streams in Selected Areas, Northern Florida (Abstract only)
  • WRIR 93-4165, Low-flow characteristics of Florida streams
  • WRIR 84-4004, Magnitude and Frequency of Floods from Urban Streams in Leon County, Florida
  • WRIR 83-4107, Selected flow characteristics of Florida streams and canals
  • WRIR 82-42, Magnitude and Frequency of Flooding on Small Urban Watersheds in the Tampa Bay Area, West-Central Florida (Abstract only)

Georgia

  • SIR 2023-5065, Effects of Impoundments on Selected Flood-Frequency and Daily Mean Streamflow Characteristics in Georgia, South Carolina, and North Carolina
  • SIR 2023-5006, Magnitude and Frequency of Floods for Rural Streams in Georgia, South Carolina, and North Carolina, 2017—Results
  • SIR 2017-5001, Methods for estimating selected low-flow frequency statistics and mean annual flow for ungaged locations on streams in North Georgia
  • SIR 2014-5030, Methods for Estimating the Magnitude and Frequency of Floods for Urban and Small, Rural Streams in Georgia, South Carolina, and North Carolina, 2011
  • SIR 2011-5042, Magnitude and Frequency of Floods for Urban and Small Rural Streams in Georgia, 2008
  • SIR 2009-5043, Magnitude and Frequency of Rural Floods in the Southeastern United States, 2006: Volume 1, Georgia
  • WRIR 00-4049, Lagtime Relations for Urban Streams in Georgia
  • WSP 2317 (1987), Simulation of flood hydrographs for Georgia streams
  • OFR 82-560, Monthly low-flow characteristics of Georgia streams (Abstract only)

Hawaii

  • SIR 2023-5014, Magnitude and Frequency of Floods on Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi, Based on Data through Water Year 2020
  • SIR 2010-5035, Flood-Frequency Estimates for Streams on Kaua'i, O'ahu, Moloka'i, Maui, and Hawai'i, State of Hawai'i
  • SIR 2004-5262, Median and Low-Flow Characteristics for Streams Under Natural and Diverted Conditions, Northeast Maui, Hawaii
  • WRIR 95-4185, Analysis of streamflow characteristics for streams on the island of Tutuila, American Samoa
  • WRIR 94-4052, Estimation of Magnitude and Frequency of Floods for Streams on the Island of Oahu, Hawaii (Abstract only)
  • WRIR 92-4099, Estimation of Median Streamflows at Perennial Stream Sites in Hawaii
  • OFR 72-453, Evaluation of the streamflow-data program in Hawaii

Idaho

  • SIR 2016-5083, Estimating peak-flow frequency statistics for selected gaged and ungaged sites in naturally flowing streams and rivers in Idaho
  • SIR 2006-5035, Estimating Low-Flow Frequency Statistics for Unregulated Streams in Idaho
  • WRIR 01-4093, Estimating Monthly and Annual Streamflow Statistics at Ungaged Sites in Idaho

Illinois

  • Research Report FHWA-ICT-23-014, Estimating Peak-flow Quantiles for Selected Annual Exceedance Probabilities in Illinois
  • SIR 2016-5050, Estimation of peak discharge quantiles for selected annual exceedance probabilities in northeastern Illinois
  • SIR 2014-5177, Estimation of Regional Flow-Duration Curves for Indiana and Illinois
  • SIR 2004-5103, Estimating Flood-Peak Discharge Magnitudes and Frequencies for Rural Streams in Illinois
  • WRIR 87-4207, Technique for Estimating Flood-Peak Discharges and Frequencies on Rural Streams in Illinois

Indiana

  • SIR 2016-5102, Estimating selected low-flow frequency statistics and harmonic-mean flows for ungaged, unregulated streams in Indiana (ver 1.1, October 2016)
  • SIR 2014-5177, Estimation of Regional Flow-Duration Curves for Indiana and Illinois
  • SIR 2013-5078, Regional Bankfull-Channel Dimensions of Non-Urban Wadeable Streams in Indiana
  • FHWA/IN/JTRP 2005/18 (2006), Flood-Frequency Relationships for Indiana
  • WSP 2372 (1991), Methods for Estimating Low-Flow Characteristics of Ungaged Streams in Indiana
  • WRIR 84-4134, Techniques for Estimating Magnitude and Frequency of Floods on Streams in Indiana

Iowa

  • SIR 2016-5111, Methods for estimating selected spring and fall low-flow frequency statistics for ungaged stream sites in Iowa, based on data through June 2014
  • SIR 2015-5055, Comparisons of estimates of annual exceedance-probability discharges for small drainage basins in Iowa, based on data through water year 2013
  • SIR 2013-5086, Methods for Estimating Annual Exceedance-Probability Discharges for Streams in Iowa, Based on Data through Water Year 2010
  • SIR 2012-5232, Computing Daily Mean Streamflow at Ungaged Locations in Iowa by using the Flow Anywhere and Flow Duration Curve Transfer Statistical Methods
  • SIR 2012-5171, Methods for Estimating Selected Low-Flow Frequency Statistics and Harmonic Mean Flows for Streams in Iowa

Kansas

  • SIR 2021-5100, Methods for Estimating Low-Flow Frequency Statistics, Mean Monthly and Annual Flow, and Flow-Duration Curves for Ungaged Locations in Kansas
  • SIR 2017-5063, Methods for estimating annual exceedance-probability streamflows for streams in Kansas based on data through water year 2015
  • WRIR 00-4079, Estimation of Peak Streamflows for Unregulated Streams in Kansas
  • SIR 2004-5032, Estimates of Median Flows for Streams on the 1999 Kansas Surface Water Register
  • WRIR 01-4142, Estimated Flow-Duration Curves for Selected Ungaged Sites in Kansas
  • WRIR 00-4113, Estimated Flow-Duration Curves for Selected Ungaged Sites in the Cimarron and Lower Arkansas River Basins in Kansas
  • OFR 80-734, Multiyear Low Flow of Streams in Northeastern Kansas
  • OFR 79-1288, Multiyear Low Flow in Southeastern Kansas

Kentucky

  • SIR 2010-5217, Methods for Estimating Selected Low-Flow Frequency Statistics for Unregulated Streams in Kentucky
  • JAWRA v.48 no.2, Bankfull regional curves for the Inner and Outer Bluegrass Regions of Kentucky, Journal of the American Water Resources Association
  • WRIR 03-4180, Estimating the Magnitude of Peak Flows for Streams in Kentucky for Selected Recurrence Intervals
  • WRIR 02-4206, Estimating Mean Annual Streamflow of Rural Streams in Kentucky
  • WRIR 97-4219, Estimation of Peak-Discharge Frequency of Urban Streams in Jefferson County, Kentucky
  • WRIR 92-4173, Regionalization of harmonic-mean streamflows in Kentucky

Louisiana

  • SIR 2024-5031, Magnitude and Frequency of Floods in the Coastal Plain Region of Louisiana, 2016
  • TR No. 60, (1998) Floods in Louisiana, Magnitude and Frequency, Fifth Edition
  • WRIR 85-4150, Floodflow Frequency of Streams in the Alluvial Plain of the Lower Mississippi River in Mississippi, Arkansas, and Louisiana
  • Research Study No. 65-2H, Magnitude and Frequency of Floods for Small Watersheds in Louisiana
  • OFR 78-218, Study to Determine Discharge at 50-percent Flow Duration and Ordinary High Water for Streams in Louisiana

Maine

  • River Research Applications Volume 37 Issue 9 2021, Model estimated baseflow for streams with endangered Atlantic Salmon in Maine, USA
  • SIR 2020-5092, Estimating Flood Magnitude and Frequency on Gaged and Ungaged Streams in Maine
  • SIR 2015-5151, Regression Equations for Monthly and Annual Mean and Selected Percentile Streamflows for Ungaged Rivers in Maine
  • SIR 2015-5049, Peak Flow Regression Equations for Small, Ungaged Streams in Maine: Comparing Map-Based to Field-Based Variables
  • SIR 2010-5179, June and August Median Streamflows Estimated for Ungaged Streams in Southern Maine
  • SIR 2004-5042, Hydraulic-Geometry Relations for Rivers in Coastal and Central Maine
  • SIR 2004-5157, August Median Streamflow on Ungaged Streams in Eastern Coastal Maine
  • SIR 2004-5026, Estimating Monthly, Annual, and Low 7-Day, 10-year Streamflows for Ungaged Rivers in Maine
  • WRIR 03-4225, August Median Streamflow on Ungaged Streams in Eastern Aroostook County, Maine
  • WRIR 99-4008, Estimating the Magnitude of Peak Flows for Streams in Maine for Selected Recurrence Intervals

Maryland/District of Columbia

  • SIR 2005-5147, Development of Regional Curves Relating Bankfull-Channel Geometry and Discharge to Drainage Area for Streams in Pennsylvania and Selected Areas of Maryland
  • AHMMD 2010, Application of Hydrologic Methods in Maryland, Third Edition, September 2010, Appendix 3: Fixed Region Regression Equations For Maryland
  • WRIR 95-4154, Technique for Estimating Magnitude and Frequency of Peak Flows in Maryland
  • WRIR 94-4020, Low-Flow Characteristics of Streams in Maryland and Delaware (Abstract only)

Massachusetts

Michigan

  • WRIR 84-4207, Statistical Methods for Estimating Flow Characteristics of Michigan Streams (Abstract only)

Minnesota

  • SIR 2023-5079, Techniques for Estimating the Magnitude and Frequency of Peak Flows on Small Streams in Minnesota, Excluding the Rainy River Basin, Based on Data Through Water Year 2019
  • SIR 2015-5170, Methods for estimating flow-duration curve and low-flow frequency statistics for ungaged locations on small streams in Minnesota
  • SIR 2009-5250, Techniques for Estimating the Magnitude and Frequency of Peak Flows on Small Streams in Minnesota Based on Data through Water Year 2005

Mississippi

  • SIR 2021-5046, Magnitude and Frequency of Floods in the Alluvial Plain of the Lower Mississippi River, 2017
  • SIR 2018-5148, Flood Frequency of Rural Streams in Mississippi, 2013
  • WRIR 91-4037, Flood Characteristics of Mississippi Streams

Missouri

  • SIR 2014-5165, Methods for Estimating Annual Exceedance-Probability Discharges and Largest Recorded Floods for Unregulated Streams in Rural Missouri
  • SIR 2013-5090, Computed Statistics at Streamgages, and Methods for Estimating Low-Flow Frequency Statistics and Development of Regional Regression Equations for Estimating Low-Flow Frequency Statistics at Ungaged Locations in Missouri
  • SIR 2010-5073, Estimation of the Magnitude and Frequency of Floods in Urban Basins in Missouri

Montana

  • SIR 2020-5142, Regional Regression Equations Based on Channel-Width Characteristics to Estimate Peak-Flow Frequencies at Ungaged Sites in Montana Using Peak-Flow Frequency Data through Water Year 2011
  • WRIR 2015-5019, Montana StreamStats
  • WRIR 03-4308, Methods for Estimating Flood Frequency in Montana Based on Data through Water Year 1998
  • WSP 2365, Methods for estimating monthly streamflow characteristics at ungaged sites in western Montana
  • WRIR 85-4071, A Method for Estimating Mean and Low Flows of Streams in National Forests of Montana

Nebraska

  • WRIR 99-4032, Peak-Flow Frequency Relations and Evaluation of the Peak-Flow Gaging Network in Nebraska

Nevada

  • WSP 2433 (1997), Methods for Estimating Magnitude and Frequency of Floods in the Southwestern United States

New Hampshire

  • SIR 2004-5019, Generalized Estimates from Streamflow Data of Annual and Seasonal Ground-Water-Recharge Rates for Drainage Basins in New Hampshire
  • SIR 2008-5206, Estimation of Flood Discharges at Selected Recurrence Intervals for Streams in New Hampshire
  • WRIR 02-4298, Development of Regression Equations to Estimate Flow Durations and Low-Flow-Frequency Statistics in New Hampshire Streams

New Jersey

  • SIR 2014-5004, Regional regression equations for the estimation of selected monthly low-flow duration and frequency statistics at ungaged sites on streams in New Jersey
  • SIR 2009-5167, Methodology for Estimation of Flood Magnitude and Frequency for New Jersey Streams
  • NJ SR No. 38 (1974), Magnitude and frequency of floods in New Jersey with affects of urbanization

New Mexico

  • SIR 2023-5058, Regression Equations for Estimating the 4-Day, 3-Year Low-Flow Frequency and Adjusted Harmonic Mean Streamflow at Ungaged Sites for Unregulated, Perennial Streams in New Mexico
  • SIR 2008-5119, Analysis of the Magnitude and Frequency of Peak Discharge and Maximum Observed Peak Discharge in New Mexico and Surrounding Areas
  • SIR 2006-5306, Analysis of the Magnitude and Frequency of Peak Discharges for the Navajo Nation in Arizona, Utah, Colorado, and New Mexico
  • WRIR 01-4271, Analysis of the Magnitude and Frequency of the 4-day, 3-year Annual Low Flow on Unregulated Streams in New Mexico
  • WRIR 96-4112, Analysis of the Magnitude and Frequency of Peak Discharge and Maximum Observed Peak Discharge in New Mexico (Abstract only)
  • WSP 2433 (1997), Methods for Estimating Magnitude and Frequency of Floods in the Southwestern United States

New York

  • SIR 2014-5220, Estimation of unaltered daily mean streamflow at ungaged streams of New York, excluding Long Island, water years 1961–2010
  • SIR 2010-5063, Low flow of streams in the Susquehanna River basin of New York
  • SIR 2009-5144, Bankfull Discharge and Channel Characteristics of Streams in New York State
  • SIR 2006-5112, Magnitude and Frequency of Floods in New York
  • WRIR 85-4070, Method for estimating low-flow statistics for ungaged streams in the Lower Hudson River Basin, New York
  • WRIR 84-4350, Evaluation of Six Methods for Estimating Magnitude and Frequency of Peak Discharges on Urban Streams in New York

North Carolina

  • SIR 2023-5065, Effects of Impoundments on Selected Flood-Frequency and Daily Mean Streamflow Characteristics in Georgia, South Carolina, and North Carolina
  • SIR 2023-5006, Magnitude and Frequency of Floods for Rural Streams in Georgia, South Carolina, and North Carolina, 2017—Results 
  • SIR 2014-5030, Methods for Estimating the Magnitude and Frequency of Floods for Urban and Small, Rural Streams in Georgia, South Carolina, and North Carolina, 2011
  • SIR 2009-5158, Magnitude and Frequency of Rural Floods in the Southeastern United States, through 2006: Volume 2, North Carolina
  • WRIR 96-4084, Estimation of Flood-Frequency Characteristics of Small Urban Streams in North Carolina

North Dakota

  • SIR 2015-5096, Regional regression equations to estimate peak-flow frequency at sites in North Dakota using data through 2009

Ohio

  • SIR 2019-5018, Flood-Frequency Estimates for Ohio Streamgages Based on Data through Water Year 2015 and Techniques for Estimating Flood-Frequency Characteristics of Rural, Unregulated Ohio Streams
  • SIR 2012-5138, Methods for estimating selected low-flow statistics and development of annual flow-duration statistics for Ohio
  • SIR 2006-5312, A Streamflow Statistics (StreamStats) Web Application for Ohio (includes peak flow equations updated from WRIR 03-4164)
  • WRIR 02-4068, Techniques for Estimating Selected Streamflow Characteristics of Rural, Unregulated Streams in Ohio
  • WSP 2432 (1994), Estimation of Peak-Frequency Relations, Flood Hydrographs, and Volume-Duration-Frequency Relations of Ungaged Small Urban Streams in Ohio
  • WRIR 86-4354, Multiple-regression Equations for Estimating Low Flows at Ungaged Stream Sites in Ohio

Oklahoma

  • SIR 2019-5143, Methods for Estimating the Magnitude and Frequency of Peak Streamflows for Unregulated Streams in Oklahoma Developed by Using Streamflow Data Through 2017
  • SIR 2015-5134, Methods for estimating the magnitude and frequency of peak streamflows at ungaged sites in and near the Oklahoma Panhandle
  • SIR 2010-5137, Methods for Estimating the Magnitude and Frequency of Peak Streamflows for Unregulated Streams in Oklahoma
  • SIR 2009-5267, Methods for Estimating Flow-Duration and Annual Mean-Flow Statistics for Ungaged Streams in Oklahoma
  • WRIR 97-4202, Techniques for Estimating Peak-Streamflow Frequency for Unregulated Streams and Streams Regulated by Small Floodwater-Retarding Structures in Oklahoma

Oregon

  • SIR 2008-5126, Estimating Flow-Duration and Low-Flow Frequency Statistics for Unregulated Streams in Oregon
  • SIR 2005-5116, Estimation of Peak Discharges for Rural, Unregulated Streams in Western Oregon
  • WSP 2433 (1997), Methods for Estimating Magnitude and Frequency of Floods in the Southwestern United States
  • WRIR 82-4078, Magnitude and Frequency in Floods in Eastern Oregon
  • OFR 80-689, Storm Runoff as Related to Urbanization in the Portland, Oregon - Vancouver, Washington Area (Abstract only)
  • OFR 70-203, Evaluation of the streamflow-data program in Oregon

Pennsylvania

  • SIR 2019-5094, Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania
  • SIR 2018-5066, Comparison of regression relations of bankfull discharge and channel geometry for the glaciated and nonglaciated settings of Pennsylvania and southern New York
  • SIR 2005-5147, Development of Regional Curves Relating Bankfull-Channel Geometry and Discharge to Drainage Area for Streams in Pennsylvania and Selected Areas of Maryland
  • SIR 2012-5142, Estimation of Baseline Daily Mean Streamflows for Ungaged Locations on Pennsylvania Streams, Water Years 1960–2008
  • SIR 2008-5102, Regression Equations for Estimating Flood Flows at Selected Recurrence Intervals for Ungaged Streams in Pennsylvania
  • SIR 2006-5130, Low-Flow, Base-Flow, and Mean-Flow Regression Equations for Pennsylvania Streams

Puerto Rico

  • SIR 2021-5062, Development of Regression Equations for the Estimation of the Magnitude and Frequency of Floods at Rural, Unregulated Gaged and Ungaged Streams in Puerto Rico Through Water Year 2017
  • SIR 2021-5054, Estimating Flow-Duration Statistics and Low-Flow Frequencies for Selected Streams and the Implementation of a StreamStats Web-Based Tool in Puerto Rico
  • WRIR 99-4142, Estimation of Magnitude and Frequency of Floods for Streams in Puerto Rico: New Empirical Models

Rainy River Basin

  • SIR 2019-5012, Techniques for Estimating the Magnitude and Frequency of Peak Flows on Small Streams in the Binational U.S. and Canadian Lake of the Woods–Rainy River Basin Upstream from Kenora, Ontario, Canada, Based on Data through Water Year 2013

Rhode Island

  • SIR 2014-5010, Equations for Estimating Selected Streamflow Statistics in Rhode Island
  • SIR 2012-5109, Magnitude of Flood Flows for Selected Annual-Exceedance Probabilities in Rhode Island, through 2010, Version 1.1

South Carolina

  • SIR 2023-5065, Effects of Impoundments on Selected Flood-Frequency and Daily Mean Streamflow Characteristics in Georgia, South Carolina, and North Carolina
  • SIR 2023-5006, Magnitude and Frequency of Floods for Rural Streams in Georgia, South Carolina, and North Carolina, 2017—Results 
  • SIR 2014-5030, Methods for Estimating the Magnitude and Frequency of Floods for Urban and Small, Rural Streams in Georgia, South Carolina, and North Carolina, 2011
  • SIR 2009-5156, Magnitude and Frequency of Rural Floods in the Southeastern United States, 2006: Volume 3, South Carolina
  • SIR 2004-5030, Estimating the Magnitude and Frequency of Floods in Small Urban Streams in South Carolina, 2001

South Dakota

  • WRIR 98-4055, A Method for Estimating Magnitude and Frequency of Floods in South Dakota

Tennessee

  • SIR 2009-5159, Streamflow-Characteristic Estimation Methods for Unregulated Streams of Tennessee
  • WRIR 03-4176, Flood-Frequency Prediction Methods for Unregulated Streams of Tennessee, 2000
  • WRIR 84-4110, Flood Frequency and Storm Runoff of Urban Areas of Memphis and Shelby County, Tennessee
  • WRIR 84-4182, Synthesized Flood Frequency of Small Urban Streams in Tennessee

Texas

  • SIR 2009-5087, Regression Equations for Estimation of Annual Peak-Streamflow Frequency for Undeveloped Watersheds in Texas Using an L-moment-Based, PRESS-Minimized, Residual-Adjusted Approach
  • WRIR 01-4243, Effects of Regulation on L-moments of Annual Peak Streamflow in Texas
  • WRIR 2000-4064, Regional equations for estimating mean annual and mean seasonal runoff for natural basins in Texas, base period 1961-90
  • WRIR 98-4015, Peak-Flow Frequency of Tributaries of the Colorado River Downstream of Austin, Texas
  • WRIR 98-4178, Peak-Discharge Frequency and Potential Extreme Peak Discharge for Natural Streams in the Brazos River Basin, Texas
  • WRIR 96-4072, Peak-Flow Frequency and Extreme Flood Potential for Streams in the Vicinity of the Highland Lakes, Central, Texas
  • WRIR 86-4069, The Effects of Urbanization on Floods in the Austin Metropolitan Area, Texas
  • WRIR 82-18, Techniques for Estimating the Magnitude and Frequency of Floods in the Dallas-Fort Worth Metropolitan Area, Texas
  • WRIR 80-17, Technique for Estimating the Magnitude and Frequency fo Floods in the Houston, Texas, Metropolitan Area

Utah

  • SIR 2008-5230, Methods for Estimating Monthly and Annual Streamflow Statistics at Ungaged Sties in Utah
  • SIR 2007-5158, Methods for Estimating Magnitude and Frequency of Peak Flows for Natural Streams in Utah
  • SIR 2006-5306, Analysis of the Magnitude and Frequency of Peak Discharges for the Navajo Nation in Arizona, Utah, Colorado, and New Mexico

Vermont

  • SIR 2006-5217, A logistic regression equation for estimating the probability of a stream in Vermont having intermittent flow
  • SIR 2014-5078, Estimation of Flood Discharges at Selected Annual Exceedance Probabilities for Unregulated, Rural Streams in Vermont
  • WRIR 02-4238, Flow-frequency characteristics of Vermont streams

Virginia

  • SIR 2014-5090, Methods and equations for estimating peak streamflow per square mile in Virginia’s urban basins
  • SIR 2011-5144, Peak-Flow Characteristics of Virginia Streams
  • SIR 2011-5143, Low-Flow Characteristics of Virginia Streams

Washington

  • SIR 2016-5118, Magnitude, frequency, and trends of floods at gaged and ungaged sites in Washington, based on data through water year 2014 (ver 1.1, October 2016)
  • SIR 2012-5078, Analysis of Low Flows and Selected Methods for Estimating Low-Flow Characteristics at Partial-Record and Ungaged Stream Sites in Western Washington
  • SIR 2009-5170, Estimating Low-Flow Frequency Statistics and Hydrologic Analysis of Selected Streamflow-Gaging Stations, Nooksack River Basin, Northwestern Washington and Canada
  • OFR 80-689, Storm Runoff as Related to Urbanization in the Portland, Oregon - Vancouver, Washington Area (Abstract only)

West Virginia

  • SIR 2010-5185, Estimation of Selected Seasonal Streamflow Statistics Representative of 1930–2002 in West Virginia
  • SIR 2010-5033, Estimation of Flood-Frequency Discharges for Rural, Unregulated Streams in West Virginia
  • SIR 2008-5105, Estimating Selected Streamflow Statistics Representative of 1930-2002 in West Virginia
  • WRIR 87-4111, Techniques for estimating flood depth frequency relations for streams in West Virginia

Wisconsin

  • WRIR 03-4250, Flood-Frequency Characteristics of Wisconsin Streams
  • WRIR 86-4005, Estimating Magnitude and Frequency of Floods for Wisconsin Urban Streams

Wyoming

  • WRIR 03-4107, Peak-Flow Characteristics of Wyoming Streams
     

National Streamflow Statistics (NSS) Application

The National Streamflow Statistics (NSS) Application is an online computer application that provides a simple method for applying regional flood-peak streamflow estimates and low flow frequency/duration streamflow estimates.
By
Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center, StreamStats

National Streamflow Statistics (NSS) Application - Formerly NSS Program

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) Application for design, planning, management, and regulatory purposes. These estimates are often needed at ungaged sites where no observed flow data are available.

By
Water Resources Mission Area, StreamStats

National Streamflow Statistics (NSS) Services

Provides U.S. Geological Survey developed and published regression equations for estimating streamflow statistics such as mean annual and monthly mean flows, flow-duration percentiles, and peak and low flows.
By
Upper Midwest Environmental Sciences Center
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