Water Resources of the United States

Water-level Sensors

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Related Links

Archive of USGS Project Alert flood notices - local and regional flood briefs since 2008.
100-Year Flood--It's All About Chance - poster discussing the meaning and use of probability language in flood characterization.
Video: 2011: The Year of the Flood

State-based Flood Information

There is a USGS Water Science Center office in each State. Alabama Arkansas Georgia Illinois Indiana Kansas Louisiana Montana North Carolina North Dakota Oklahoma South Carolina Tennessee Wyoming Texas Alaska Arizona California Caribbean Colorado Connecticut Florida Hawaii Idaho Iowa Kentucky Maine Maryland-Delaware-D.C. Massachusettes Michigan Minnesota Mississippi Missouri Nebraska Nevada New Hampshire New Jersey New Mexico New York Ohio Oregon Pennsylvania Rhode Island South Dakota Utah Vermont Virginia Washington West Virginia Wisconsin

Click the map above to visit a State-specific flood page (if available), or check out one of these State flood databases:

Colorado Flood Database

Oklahoma Flood Database

USGS Contact Information

For questions related to this site or to contribute content, please email TODD KOENIG or BOB HOLMES.

USGS Flood Information   

The USGS provides practical, unbiased information about the Nation's rivers and streams that is crucial in mitigating hazards associated with floods. This site provides information about the USGS activities, data, and services provided during regional high-flow events, such as hurricanes or multi-state flooding events. The USGS response to these events is typically managed by the National Floods Specialist.

Atlantic States:

An upper atmospheric low-pressure system over the Southeast combined with moisture from Hurricane Joaquin off the Atlantic coast to create historic rainfall in early October. Major flooding resulted in central and coastal South Carolina where the USGS recorded peaks of record at 17 locations and sent crews out to make about 140 streamflow measurements. Flood documentation studies were initiated in cooperation with the Federal Emergency Management Agency (FEMA). The USGS also monitored the effects of moderate coastal surges from Hurricane Joaquin. Throughout the coastal areas, the storm-surge sensor deployments were coordinated with the coastal change predictions and the contaminant sampling.

image of USGS flood event viewer website

USGS hydrologists measured flooding from inland systems and storm surge from Hurricane Joaquin: Crews along the Atlantic States collected high-water marks and recorded surge and wave height with storm surge sensors and rapid deployment gages. These data collection locations appear on a special event viewer, which can be found by clicking the image at left. Links to technical specifications, data, and mapping services are available at:

image of CISA report cover

Carolinas Integrated Sciences and Assessments (CISA) Report: October 2015 SC Flood Event - An Integrated Assessment

An analysis by the Carolinas Integrated Sciences & Assessments (CISA) at the University of South Carolina of the climatological and hydrological conditions which contributed to this extreme event and how to consider future risks as communities recover and rebuild.

image of USGS flood graph

South Carolina Flood Frequency Q&A: Dr. Robert Holmes, USGS National Flood Hazard Coordinator, takes some time to discuss and answer some hot issues related to the South Carolina floods.

USNews: photo of flooded area in SC

N.S.News & World Report: The Latest on rainstorm: Obama signs disaster declaration for South Carolina counties: US News tracks the effects of the huge rainstorms in the Southeast with help from John Shelton of the USGS South Atlantic Water Science Center.

N.S.News & World Report: Sun Appears in South Carolina, But Flood Troubles Remain

NASA Video: rainfall progression in Southeast

NASA rainfall progression video: NASA/JAXA's GPM satellite measured record rainfall that fell over the Carolinas from September 26 to October 5...

Post and Courier: photo of flooded area in SC

Rising water in Midlands increases threat of flooding in Lowcountry rivers: The Post and Courier, with the help of John Shelton, reports on the progression of flood waves on South Carolina streams moving toward the coast.

image of USGS Coastal Change Hazards Portal

Coastal Change Hazards Portal: The USGS Coastal Change Hazards Team at the USGS St. Petersburg Coastal and Marine Science Center responded to the threat of Hurricane Joaquin by forecasting the probability of coastal change from erosion, overwash, etc. Daily updates to the Coastal Change Hazards Portal in collaboration with NOAA followed Joaquin's run-up through the Atlantic.

photo of USGS scientists

USGS scientists prepared to demonstrate a new capability that measures potential environmental health impacts from Hurricanes: Crews along the Atlantic coast collected sediment quality samples before and after Hurricane Joaquin passed offshore. Samples were analyzed for a broad suite of chemical and microbial contaminants as part of the USGS Sediment-bound Contaminant Resiliency and Response (SCoRR) strategy. SCoRR prioritized co-location of pre-storm and post-storm data in key habitats and public spaces to evaluate potential environmental contaminant threats that may have persisted in the aftermath of Hurricane Joaquin. SCoRR sampling locations were coordinated with deployments of the USGS SWaTH network. Contact: Michael Focazio (USGS) mfocazio@usgs.gov 703-648-6808

photo of USGS scientist hydrographer

USGS Newsroom: USGS Deploys Crews in Advance of Hurricane Joaquin in Virginia USGS field crews deployed storm tide sensors along the Virginia coast near Virginia Beach, along the Western Chesapeake Bay, and on the Eastern Shore ahead of Hurricane Joaquin. Storm tide sensors measure the tidal fluctuations and height of the tide relative to land surface...

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URL: https://water.usgs.gov/floods/events/2015/Joaquin/
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Page Last Modified: Friday, 03-Feb-2017 10:30:33 EST