Streamflow

Tamarisk is now declining in abundance in some parts of its range in the West because of the release and spread of a biological control agent, a defoliating beetle.
Tamarisk is a familiar invasive species across the American West, occupying hundreds of thousands of acres of river floodplains since the 1960s. This shrub or small tree, which is also known as saltcedar, has successfully colonized a range of sites.
USGS invasive species science, such as this tamarisk research, provides critical information for society on the economic and ecological price of controlling invasive species.
Real-time streamflow data are available from the U.S. Geological Survey for over 4200 stations throughout the United States. These data are available only through the World-Wide Web.
USGS real-time streamflow data typically are recorded at 15- to 60-minute intervals, stored onsite, and then transmitted to USGS offices every 1 to 4 hours, depending on the data relay technique used.
Real-time streamflow data available on USGS pages are PROVISIONAL data that have not been reviewed or edited. These data may be subject to significant change and are not citable until reviewed and approved by the U.S. Geological Survey.
At some USGS stream-gage installations, NWS maintains a separate stage sensor that is serviced by NWS technicians.
Stream stage is an important concept when analyzing how much water is moving in a stream at any given moment.