Improving Drought Forecasts
November 30, 2007: From the deserts of the American southwest to the pine forests of the Deep South, drought-weary residents have one thing on their minds: "I wish it would rain!"
Technically, what they should be wishing for is "more streamflow," says Dr. Ashutosh Limaye, a hydrologist at the National Space Science and Technology Center (NSSTC) in Huntsville, Alabama.
Streamflow is a term used by water management specialists to mean, very simply, the amount of water in streams and rivers. Areas of drought have reduced streamflow, and experts believe they can better forecast droughts by studying this key indicator of dry conditions.
"Streamflow is always changing, from day to day and even minute to minute, for a wide variety of reasons: evaporation from the soil and from bodies of water, runoff from rainfall and snowmelt, transpiration by plants and trees, and other natural...(complete story here).
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