There are several Internet
sites that specialize in information
about streams, rivers and lakes around
the world. NASA's Marshall Space Flight
Center maintains the Global
Hydrology and Climate Center, while
the United
States Geological Survey (USGS)
maintains a comprehensive web site covering
water quality, surface and groundwater
monitoring, lake levels, discharge rates
and other facets of continental hydrology.
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Streamflow
map from USGS
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