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Indiana Drought Watch
This map (from USGS's National Drought Watch Web site) shows the 7-day average streamflow conditions in hydrologic units. Thus, the map shows conditions adjusted for this time of the year. The colors represent 7-day average streamflow percentiles for the day of the year. USGS sites having at least 30 years of record are used. The data used to produce this map are provisional and have not been reviewed or edited. They may be subject to significant change.
Drought Information
Streamflow and Ground-water Level Information from the U.S. Geological Survey
More Drought Information Resources
Definitions of Drought
- Meteorological drought:
- "A period of abnormally dry weather sufficiently prolonged for the lack of
water to cause serious hydrologic imbalance in the affected area." (Huschke,
R.E., ed., 1959, Glossary of meteorology: Boston, American Meteorological
Society, 638 p.)
- Agricultural drought:
- "A climatic excursion involving a shortage of precipitation sufficient to
adversely affect crop production or range production." (Rosenberg, N.J., ed.,
1979, Drought in the Great Plains--Research on impacts and strategies:
Proceedings of the Workshop on Research in Great Plains Drought Management
Strategies, University of Nebraska, Lincoln, March 26-28: Littleton, Colorado,
Water Resources Publications, 225 p.)
- Hydrologic drought:
- "A period of below average water content in streams, reservoirs,
ground-water aquifers, lakes and soils." (Yevjevich Vujica, Hall, W.A., and
Salas, J.D, eds., 1977, Drought research needs, in Proceedings of the
Conference on Drought Research Needs, December 12-15, 1977: Colorado State
University, Fort Collins, Colorado, 276 p.)
- Definitions from the National Drought
Mitigation Center.
Map of below normal 7-day average streamflow compared to historical streamflow for the day of year
View a larger map.
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