I'd like hydrologic data and information for streams, rivers or lakes. Where can I find this?

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.


For more hydrological data and information, try these web sites as well:

USGS Water resources page Streamflow map from USGS


Still have questions about hydrology? Contact GCMD science staff at: GCMD User Support.

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