February 2013


Estimated mean annual ratio of ET to P
Feb 19, 2013New Maps Provide Crucial Information for Water Managers

For the first time, U.S. Geological Survey scientists have mapped long-term average evapotranspiration rates across the continental United States—a crucial tool for water managers and planners because of the huge role evapotranspiration plays in [...]

Feb 1, 2013Landsat Monitors Chesapeake Bay Change

Landsat is a critical and invaluable tool for characterizing the landscape and mapping it over time. Landsat data provides a baseline of observations for science about how human activities on the land affect water quality, affect wildlife [...]