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Stream-gage measurement
Use of specialized instruments designed for observing, checking, and recording the water discharge that occurs in a natural channel.
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PDF Historic flooding in northern Georgia, September 16-22, 2009 [More info]
Explains the meteorological and hydrologic conditions that led to widespread flooding in this area.
PDF Historic Flooding in South Georgia, March 27-April 3, 2009 [More info]
Explains the meteorological and hydrologic conditions that led to widespread flooding in this area.
Hudson River salt front data [More info]
Tide stage, specific conductance, water temperature, and freshwater inflow at selected Hudson River (New York) gages updated every 4-hours to measure the effects of freshwater withdrawals and upstream movement of the salt front.
Hydraulics Laboratory [More info]
Includes an indoor hydraulics laboratory available for rent. Links to meter calibrations, current meter performance, and modeling activities.
Hydrologic conditions for Illinois: Drought perceptions, effects, and assessment [More info]
Map of stream conditions and links to precipitation data, drought statistics, and information on floods and droughts in Illinois.
Hydrologic conditions for North Dakota [More info]
Links by map location or station number to real-time stage and streamflow, real-time water quality, ground-water data, long-term hydrographs, and annual water-data reports to view and download for past and current water conditions in North Dakota.
PDF Hydrologic conditions in Georgia, 2010 [More info]
Georgia has recently seen a lot of extreme weather events triggering widespread flooding. This summary of streamflow and discharge from selected locations shows graphically the conditions during 2010.
Hydrologic Instrumentation Facility [More info]
Provides hydrologic instruments, equipment, and supplies for USGS, other Federal agencies, and cooperators. Also tests, evaluates, repairs, calibrates, and develops hydrologic equipment and instruments.
Hydrologic studies in Oregon [More info]
Links to water data studies for river and lake basins in Oregon including ground water and water quality studies.
Indiana hydroacoustics [More info]
Use of hydroacoustics by the USGS in Indiana to make streamflow measurements using Acoustic Doppler Current Profilers (ADCPs) and other hydroacoustic current meters.
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