It’s dry. Very dry. Georgia’s state climatologist
David
Stooksbury said May 4 that conditions are much worse than this time last
year.
“Last
year we were coming off an El Nino winter. We were actually very wet for the
planting season,” said Stooksbury, a professor of engineering in the University
of Georgia College of Agricultural and
Environmental Sciences.
“This year,” he said, “we didn’t get the winter rains we needed to replenish the soil
moisture. So we are in the major planting season with below-average soil moisture.”
In 1998, the Palmer Drought Severity Index showed excessive soil moisture during spring
planting. This year the PDSI shows the southern third and northeast corner of the state in
severe drought. The rest of the state is in moderate drought, except the northwest corner,
which is in an early drought stage.
For many Georgia farmers, who have faced several years of bad weather, this could be the
make-it-or-break-it year.
Droughts Take Time
“Drought isn’t a situation you can see like
a hurricane or a thunderstorm,” Stooksbury said. “It develops over time. And
it takes time to come out of it.”Droughts aren’t strangers in Georgia. “We suffered
through major droughts in 1998, ’86 and ’54,” he said. “Drought is a normal
part of our climate. But it’s something we have to plan for.”Over the past nine months, Georgia has faced
rainfall deficits of 5 to 15 inches, Stooksbury said. “In the critical three-month
recharge period this winter,” he said, “rainfall levels were 5 to 8 inches
below normal.”Putting the drought into historical perspective,
Stooksbury said that in 98 out of 100 years, the October-through-March precipitation
in west-central Georgia could be expected to be greater than it has been this
year. In 95 of 100 years, it could be expected to be greater in southwest
and south-central Georgia than this year’s totals.
Much Rainfall Needed
Stooksbury said we are entering a La Nina summer,
which usually brings more tropical activity in the Atlantic Ocean and Gulf
of Mexico. The rain from a tropical storm could help break the drought.“In some areas, we need 11 inches of rainfall
to get back to normal,” he said. “Cooler temperatures and low winds have helped
by keeping down the evapotranspiration rate.”
The soil is losing moisture at one-fifth to
one-quarter inch per day through evaporation and transpiration from plants.
Georgia temperatures have mostly held to the 70s and low 80s with calm winds.
When temperatures move into the 90s, the evapotranspiration rate increases
to about one-third inch per day, adding to the need for more rain.
“May will be our critical month,” Stooksbury
said. “We aren’t in a disaster situation yet. If we get rain in May we can
make a crop.”
Needs Greatest in South
Napoleon Caldwell, a Water Resources Management
unit spokesman for the Environmental Protection Division of the Georgia Department
of Natural Resources, says water supply hasn’t become a critical issue yet.“A dry year equals more irrigation and water
use,” Caldwell said. “Our aquifers didn’t get recharged over the winter, so
the ground water can affect surface water flows.”The greatest anticipated effect will be in the
Flint River basin, where most of the state’s irrigated farmland lies.Major metropolitan areas depend on surface waters
from reservoirs for their water and aren’t facing shortages.“The reservoirs are fairly high,” he said. “We
expect some problems later in the summer, but not as severe as the problems
in south Georgia.”Caldwell said the most prevalent problems in
metro areas isn’t the supply but the infrastructure that delivers the water.“When daylight savings time begins, more people
begin gardening and outdoor watering,” he said. “That causes water pressure
to dip to unacceptable levels.”
Forest Fire Danger Greater
Another concern is the rise in forest fires.
In March and April alone, Georgia had more than 3,700 forest fires, burning
more than 26,000 acres. In the same months last year, Georgia had 1,300 fires,
burning 6,000 acres.“Usually by late April, when things green up,
we are out of danger,” said Fred Allen, director of the Georgia Forestry Commission.
“That hasn’t happened lately.”One of the big problems facing Georgia’s forests
is the lack of prescribed burning. “That releases the fuel buildup,” Allen
said. “Not doing it just adds fuel to the fire.”Incidentally, the worst forest fire in Georgia
history was in the Okefenokee Swamp during the drought of 1954.May, June and July predictions show a 38 percent
chance south Georgia will be wetter than normal, a 33 percent chance it will
be normal and a 28 percent chance it will be drier than normal.