Drought Definitions
Drought Information Resources
Map of daily streamflow compared to historical streamflow for the day of the year
USGS Water Supply Paper 2375 - National Water Summary 1988-89--Floods and Droughts Climate and droughts (p. 89-98) Evapotranspiration and droughts (p. 99-104) Paleohydrology and its value in analyzing floods and droughts (p. 105-116) Management of water resources for drought conditions (p. 147-156)