This description is of field measurements of soil erosion and runoff as written by the Food and Agriculture Organization of the United Nations. The site addresses everything from experimental practices to actual...

This USGS web page provides information on the quantity and timing of the streamflow in the Nation's rivers is a vital asset that safeguards lives and property and helps to ensure adequate water resources for a healthy...

National Ocean Service (NOS) scientists collect, study, predict and disseminate information about tides and water levels. Tutorial introduces the causes and variations of tides and currents, their impacts on human...

The United States Geological Survey's (USGS) real-time data on streamflow conditions from all over the United States. A map with colored dots depicts streamflow conditions that are updated every one to four hours daily.