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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.

Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.

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January 1, 2024

Watershed hydrology assessment for the Lower Colorado River Basin. Appendix A: Statistical hydrology Watershed hydrology assessment for the Lower Colorado River Basin. Appendix A: Statistical hydrology

Statistical analysis of the observational record from U.S. Geological Survey (USGS) streamgages and period of historical flow observations prior to the gage installation provides an informative means of estimating flood flow frequency. The U.S. Geological Survey contributed to the InFRM team’s efforts by performing the statistical analysis of the gaged record and authored this Appendix...

Authors

David Wallace, Kara M. Watson

Oklahoma-Texas Water Science Center

January 1, 2024

Geophysical identification of potential groundwater – surface water interactions in the Bonita Peak Mining District, San Juan County, Colorado Geophysical identification of potential groundwater – surface water interactions in the Bonita Peak Mining District, San Juan County, Colorado

This report includes the results and interpretation of geophysical investigations to aid in the location, identification, and conceptual site model (CSM) development of the near surface groundwater and surface water hydrology of the Upper Cement Creek and California Gulch of the Animas Rivers within the Bonita Peak Mining Districts (BPMD). Mine influenced water (MIW) from numerous mine...

Authors

Dale D. Werkema, Neil C. Terry, Martin A. Briggs, Elizabeth Rutila, Stephen Dyment

Water Resources Mission Area

January 1, 2024

Groundwater/surface-water interaction Groundwater/surface-water interaction

No abstract available.

Authors

Howard W. Reeves, Serban Danielescu, Elizabeth Priebe, Helen Zhang

Upper Midwest Water Science Center

January 1, 2024

Puget small streams monitoring program annual status report, water year 2020 Puget small streams monitoring program annual status report, water year 2020

This status report summarizes data collection from Summer 2020 for the Stormwater Action Monitoring (SAM) project.

Authors

Rich W. Sheibley

Water Resources Mission Area, Washington Water Science Center

December 31, 2023

Glacier National Park bumble bee survey report 2023 Glacier National Park bumble bee survey report 2023

Glacier National Park's grasslands provide important contributions to the character and ecology of the park. In 1999-2001, Glacier National Park (hereafter, the park) established 155 permanent vegetation monitoring plots to inventory grassland vegetation communities east of the Continental Divide. In June of 2023, the Blackfeet Nation (Amskapi Piikuni) re-introduced a herd of free...

Authors

Lindsay Marie Dose, Erica Sanderleaf Sarro Gustilo, Tabitha A. Graves

Ecosystems Mission Area, Northern Rocky Mountain Science Center

December 31, 2023

Evaluation of fish passage for assessment of invasive carp deterrents at locks in the upper Mississippi River Evaluation of fish passage for assessment of invasive carp deterrents at locks in the upper Mississippi River

No abstract available.

Authors

Andrea K. Fritts, James T. Lamer, Joshua Abner, Mark W. Fritts, Mark Cornish, Marybeth K. Brey

Ecosystems Mission Area, Upper Midwest Environmental Sciences Center