Alexandria Digital Library Feature Type Thesaurus
How does a U.S. Geological Survey streamgage work? [ More info] Explains how streamflow is measured, how it relates to water level, how stream discharge is measured, and how to find data on streamflow.
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.
Identifying sources of fecal coliform bacteria in selected streams on Virginia's Total Maximum Daily Loads (TMDL) priority list [ More info] Describes project to identify sources of fecal coliform bacteria by ribotyping to develop the use of Maximum Daily Load (TMDL) values for contaminated stream segments in Virginia.
Impounded river systems [ More info] Article from Status and Trends of the Nation's Biological Resources on the serious impacts to river systems due to damming and flow regulation, and rehabilitation, monitoring, and research on such rivers.
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.
Invasive crayfish in the Pacific Northwest [ More info] These organisms have negative effects on local ecosystems, but we don't yet know how extensively they have spread. Here is a key to help people identify them.
Long Term Resource Monitoring Program (Upper Mississippi River area): sampling data [ More info] Downloadable data and other information about the sampling programs used in long-term monitoring of the upper Mississippi River area.
Lower Columbia River dissolved gas monitoring network [ More info] Links to real-time data for total dissolved gas, temperature, and barometric pressure in lower Columbia River in Oregon and Washington and to project reports.
Maine river ice monitoring system [ More info] The USGS in Augusta, Maine monitors river and ice conditions in areas of ice accumulation on the Kennebec River near Augusta providing real-time river stage data and real-time pictures of ice conditions at this location.
Mercury contamination of aquatic ecosystems [ More info] Fact sheet on mercury bioaccumulation and cycling in the environment. Also available in PDF format.
Alphabetical Index of Topics
a b c d e f g h i j k l m n o p q r s t u v w x y z