Weather, Drought

Caption: 'Dust.' Dust covers a fence line in the American Midwest during the Dust Bowl years. In: 'To Hold This Soil', Russell Lord, 1938. Miscellaneous Publication No. 321, U.S. Department of Agriculture. Image ID: wea01421, Historic NWS Collection, High Resolution Image, From photolib.noaa.gov/historic

What is a drought? The definition of drought varies on the basis of the situation or area for which drought is being defined. A simple definition of drought is a period of water shortage. However, a period of water shortage can range from a few days or weeks for some crops to a few years for large reservoirs or ground-water aquifers. Similarly, the water shortage can range from as little as an inch of precipitation for shallow root crops to as much as several feet of precipitation for water supplies that rely on streamflow or ground water. Unlike the effects of other weather-related hazards, such as floods, the effect of a drought can develop slowly. Source: USGS

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