Hydrologist Reza Savabi
(right) and hydrologic
technician Nicholas Cockshutt
monitor soil moisture
fluctuations near the
Everglades National Park.
This investigation is part
of improving water management
on agricultural areas.
In 1947, writer and conservationist Marjory Stoneman Douglas
called attention to the dangers facing Florida's Everglades in a book
called "The Everglades: River of Grass." At that time, many
considered this unique natural ecosystem to be a vast swamp of limited
value. Now, more than half a century later, the Everglades National
Park and adjacent lands are undergoing a Comprehensive Everglades Restoration
But how will the plan affect the more than 23,000 people
directly involved in South Florida agriculture?
"Farmers in the area have taken a key role in promoting
the need for scientific investigation into the possible impact of the
CERP on the sustainability of agriculture in South Florida," says
M. Reza Savabi, a hydrologist with the ARS
Subtropical Horticulture Research Station in Miami, Florida.
With federal and state government support, CERP is in
its third year. The South Florida Water Management District and U.S.
Army Corps of Engineers play major roles in the effort. Savabi collaborates
with both of these agencies, as well as the University of Florida, Florida
International University, University of Miami, Florida A&M University-Tallahassee,
U.S. Geological Survey, and the South Dade Soil and Water Conservation
District. These organizations provide agro-hydrology data. Savabi and
colleagues at the Miami lab provide the knowledge and technology needed
to improve water management on agricultural areas while maintaining
environmental quality in South Florida.
Savabi first got involved with the Everglades restoration
project 5 years ago, after local farmers sought help from ARS to address
potential water and crop-production issues related to the project. Savabi
joined the Miami station and established the ARS Everglades Agro-Hydrology
Project in 1998.
In South Florida, Savabi and his colleagues monitor soil
water balance, climate, and the quality and movement of water in the
Biscayne aquifer, checking instrumentation several times a week. In
cooperation with the U.S. Army Corps of Engineers and local farming
groups, he prepares Geographic Information Systems land-use maps; conducts
research on soil water intake and on improving soil quality by use of
soil amendments; and works on a model to predict the amount of water
in the soil, quality of water, evaporation, and where and when flooding
and damage to crops or trees might occur.
The model under development, called the Everglades Agro-Hydrology
Model, simulates water balance, agrochemical movements, soil tillage,
irrigation, and crop growth. It's aimed at helping farmers weigh alternative
management or cropping systems to cope with the hydrologic changes that
may result from the Everglades restoration plan.
Savabi has received help with this very detailed model
from other hydrologists and modelers, including scientists from West
Lafayette, Indiana; Temple, Texas; and Tifton, Georgia.
The model is beginning to be tested in Miami-Dade County,
where farmers provide information about yields and when they plant,
fertilize, and perform other agronomic tasks. Once calibrated, the model
will be used on South Florida farms. Savabi hopes to expand its use
throughout Florida, U.S. southeastern coastal agricultural areas, and
Flores, Agricultural Research Service Information Staff.
This research is part of Water Quality and Management,
an ARS National Program (#201) described on the World Wide Web at www.nps.ars.usda.gov.
M. Reza Savabi
is with the USDA-ARS Subtropical
Horticulture Research Station, 13601 Old Cutler Rd., Miami, FL 33158;
phone (305) 254-3633, fax (305) 969-6416.
"Everglades Restoration: Agriculture Affected by South Florida
Program?" was published in the August
2003 issue of Agricultural Research magazine.