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USGS Frequently Asked Questions
FAQ's about Drought
Where in the Nation are droughts or very low flows occuring now? How can I see these sites on a map and get to the data?
Why doesn't a drought go away when it rains?
What determines if a well will go dry?
What can cause water levels in wells to change?
Does a shortage of rain mean that a drought will occur?
Why does the USGS collect streamflow data?
When does a drought begin?
What is the Palmer Index?
What is “El Nino” and what are its effects?
What causes drought?
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