Generalized least-squares WREG regression files for Hawaiʻi flood-frequency analysis, based on data through water year 2020

The U.S. Geological Survey (USGS), in cooperation with the State of Hawaiʻi Department of Transportation, estimated flood magnitudes for the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEP) for unregulated streamgages in Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi, using data through water year 2020. Regression equations which can be used to estimate flood magnitude and associated frequency at ungaged streams were developed. The methods and results of the study are published in a separate report (https://doi.org/10.3133/sir20235014). This data release contains (1) a folder with the PeakFQ output files for each streamgage, ".PRT" and ".EXP" files, for use in...

Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Hawaii, Hawaii Island, Kauai, Maui, Molokai, All tags... Oahu, environment, flood estimates, geoscientificInformation, hydrodynamics, hydrology, peak flows, regression, watershed management, Fewer tags

Ohio-Kentucky-Indiana Water Science Center

The Ohio-Kentucky-Indiana Water Science Center looks forward to helping you achieve your goals by providing water quantity and quality information, as well as scientific tools and understanding, when and where they are needed by citizens, businesses, and public officials.

Tags: Edge-of-Field Monitoring, Great Lakes Restoration Initiative, LiDAR mapping, NAWQA, Ohio River Basin, All tags... bathymetry, biological community monitoring, biology, bridge scour, dam safety, droughts, ecological flows, flood inundation mapping, floods, fluvial erosion hazards, groundwater, habs, harmful algal blooms, hydrographic surveys, hydrologic modeling, invasive species, lake monitoring, lakes, low flows, microbiology, microbiology lab, nutrients, peak flows, sediment-source tracking, spill response, streamflow, super gages, surface water, unmanned aircraft systems, water availability, water budgets, water quality, water use, watershed monitoring, Fewer tags

Flood frequency and source data used in the regional regression analysis of annual peak flows in Connecticut (2020) (ver. 2.0, April 2021)

Current estimates of the magnitude and frequency of floods at gaged and ungaged stream sites are critical for assessing flood risk, delineating flood zones, designing hydraulic structures, and managing flood plains. The Connecticut Department of Transportation collaborated with U.S. Geological Survey (USGS) in a study to improve the flood-frequency estimates in Connecticut and develop regional regression equations for estimating annual exceedance probability discharges at ungaged sites in Connecticut. The results of the study are found in Scientific Investigations Report (http://doi.org/10.3133/sir20205054). This companion data release consists of data compiled and used for the flood-frequency analysis of annual...

Categories: Data, Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Connecticut, Massachusetts, New York, Rhode Island, USGS Science Data Catalog (SDC), All tags... annual exceedance probability discharges, flood frequency, peak flows, regional regression equation, Fewer tags

Data used to assess precipitation, temperature, groundwater-level elevation, streamflow, and potential flood storage trends within the Brazos, Colorado, Big Cypress, Guadalupe, Neches, Sulphur, and Trinity River Basins in Texas through 2017

This dataset provides compiled and computed data from 1900 through 2017 associated with streamflow statistics used to perform regional analyses for the Brazos, Colorado, Big Cypress, Guadalupe, Neches, Sulphur, and Trinity River Basins. These seven river basins are mostly within Texas, but parts of some of the basins extend into New Mexico and Louisiana. Because changes in precipitation, temperature and groundwater levels can appreciably affect streamflow, understanding changes in streamflow requires taking these forcing variables into account. Long-term streamflow statistics for these seven river basins were derived by analyzing streamflow data and other observed climatological variables. Data include tables of...

Tags: Big Cypress Basin, Brazos River Basin, Colorado River Basin, Guadalupe River Basin, Louisiana, All tags... Neches River Basin, New Mexico, Sulphur River Basin, Texas, Texas, Trinity River Basin, USGS Science Data Catalog (SDC), boundaries, climate, climatologyMeteorologyAtmosphere, dam, groundwater-level elevation, peak flows, precipitation, river, river basin, streamflow, surface-water storage, temperature, Fewer tags

Results of peak-flow frequency analysis and regionalization for selected streamgages in or near Maine, based on data through water year 2019 (ver. 3.0, August 2021)

The U.S. Geological Survey (USGS) recently completed a report documenting methods for peak-flow frequency analysis following implementation of the Bulletin 17C guidelines (https://doi.org/10.3133/tm4B5). The methods provide estimates of peak-flow quantiles for 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEPs) for selected streamgages operated by the USGS and Environment Canada. In association with the report, this data release presents peak-flow frequency analyses for 148 streamgages (127 stations in Maine, 16 in New Hampshire, and 5 in New Brunswick, Canada). Included are 148 individual ".PRT" text files that contain results of the flood-frequency analyses of annual peak flows...

Categories: Data; Tags: Maine, PeakFQ, USGS Science Data Catalog (SDC), flood frequency, peak flows, All tags... regionalization, Fewer tags

PeakFQ program input and output files for selected streamgages in Connecticut

Flood-frequency analyses for 141 streamgages in Connecticut were updated using the U.S. Geological Survey program PeakFQ, version 7.2 (https://water.usgs.gov/software/PeakFQ/; Veilleux and others, 2014). The PeakFQ program follows Bulletin 17C national guidelines for flood-frequency analysis (https://doi.org/10.3133/tm4B5). The input and output files to PeakFQ that were used in the Connecticut flood-frequency update are presented. Individual file folders for the 141 streamgages using the streamgage identification number as the folder name contain three files: ".TXT" file used as input to PeakFQ contains the annual peak flows for the streamgage in standard PeakFQ (WATSTORE) text format available from NWIS web at...

Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Connecticut, PeakFQ, flood frequency, peak flows

Flood-regression regions, basin polygons, and basin characteristics for 238 selected streamgages in Hawaiʻi, based on data through water year 2020

The U.S. Geological Survey (USGS), in cooperation with the State of Hawaiʻi Department of Transportation, estimated flood magnitudes for the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEP) for unregulated streamgages in Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi, using data through water year 2020. Regression equations which can be used to estimate flood magnitude and associated frequency at ungaged streams were developed.The methods and results of the study are published in a separate report (https://doi.org/10.3133/sir20235014). This data release includes two geographic information system (GIS) shapefiles, one of polygons representing the extents of the...

Tags: Hawaii, Hawaii Island, Kauai, Maui, Molokai, All tags... Oahu, basin characteristics, flood estimates, flood frequency, hydrology, linear regression, peak flows, weighted regression, Fewer tags

PeakFQ inputs and selected outputs for 238 selected streamgages in Hawaiʻi through water year 2020

The U.S. Geological Survey (USGS), in cooperation with the State of Hawaiʻi Department of Transportation, estimated flood magnitudes for the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEP) for unregulated streamgages in Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi, using data through water year 2020. Regression equations which can be used to estimate flood magnitude and associated frequency at ungaged streams were developed. The methods and results of the study are published in a separate report (https://doi.org/10.3133/sir20235014). This data release includes peak-flow, specification, output, and export files from version 7.3 of USGS PeakFQ software (Veilleux...

Tags: Hawaii, Hawaii Island, Kauai, Maui, Molokai, All tags... Oahu, annual exceedance probability, environment, flood estimates, flood frequency, generalized least-squares regression, hydrodynamics, hydrology, multiple linear regression, peak flows, watershed management, Fewer tags

Data in support of flood-frequency report—Magnitude and Frequency of Floods on Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi, Based on Data through Water Year 2020

The U.S. Geological Survey (USGS), in cooperation with the State of Hawaiʻi Department of Transportation, estimated flood magnitudes for the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEP) for unregulated streamgages in Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi, using data through water year 2020. Regression equations which can be used to estimate flood magnitude and associated frequency at ungaged streams were developed. The methods and results of the study are published in a separate report (https://doi.org/10.3133/sir20235014). This data release contains data supporting the larger work: (1) PeakFQ inputs and selected outputs for 238 selected streamgages...

Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Hawaii, Hawaii Island, Hydrology, Kauai, Maui, All tags... Molokai, Oahu, USGS Science Data Catalog (SDC), Water Resources, environment, flood estimates, geoscientificInformation, hydrodynamics, hydrology, peak flows, regression, watershed management, Fewer tags

Climate Change and Peak Flows: Informing Managers About Future Impacts to Streamflow Dynamics and Aquatic Habitat

What will the rivers of the Pacific Northwest look like in the future? Will they be stable or unstable? Will the waters be cold and clear or warm and muddy? Will they have salmon or other species? These questions motivated our two-year study of climate warming effects on headwater streams draining the Cascade Mountains. Using a novel combination of snow, geohydrology, and sediment transport models we assessed the vulnerability of stream channels to changing peak streamflow. Our snow modeling shows that with just a 2°C warming, snowfall shifts to rainfall at all elevations, peak snowpacks occur over two months earlier, and snowpacks are reduced by over half of historical values. Our geohydrology modeling shows that...

Categories: Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2012, CASC, Cascade Mountains, Completed, Deschutes River Basin, All tags... Northwest, Northwest, Northwest CASC, Projects by Region, Rivers, Streams and Lakes, Rivers, Streams and Lakes, Water, Coasts and Ice, Water, Coasts and Ice, Willamette River Basin, aquatic habitat, geomorphology, hydrologic extremes, peak flows, snow dynamics, vulnerability assessment, Fewer tags

Selected appendices from flood-frequency report—Magnitude and Frequency of Floods on Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi, Based on Data through Water Year 2020

The U.S. Geological Survey (USGS), in cooperation with the State of Hawaiʻi Department of Transportation, estimated flood magnitudes for the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (AEP) for unregulated streamgages in Kauaʻi, Oʻahu, Molokaʻi, Maui, and Hawaiʻi, State of Hawaiʻi, using data through water year 2020. Regression equations which can be used to estimate flood magnitude and associated frequency at ungaged streams were developed. The methods and results of the study are published in a separate report (https://doi.org/10.3133/sir20235014). This data release contains the tabular data that are listed as appendices (appendices A, B, and D) in the larger work: Magnitude...

Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Hawaii, Hawaii Island, Kauai, Maui, Molokai, All tags... Oahu, environment, environment, flood estimates, geoscientificInformation, hydrodynamics, hydrology, peak flows, watershed management, Fewer tags