Use and occurrence of pesticides in the Apalachicola-Chattahoochee-Flint River basin, Georgia, Alabama, and Florida, 1960-91

Abstract

Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

HYDROLOGIC MODELING AT THE WATERSHED SCALE USING NPSM1

“…The Apalachicola-Chattahoochee-Flint River basin drains about 19,600 mi2 in western Georgia, southeastern Alabama, and the Florida panhandle (Stell et al, 1995;Frick et al, 1998). The ACF Basin is comprised of the Chattahoochee and Flint Rivers, which join at Lake Seminole to form the Apalachicola River, which flows to the Gulf of Mexico (Stell et al, 1995). The watershed lies within portions of the Blue Ridge, Piedmont, and Coastal Plain physiographic provinces and is dominated by agricultural and forest land.…”

“…The majority of agricultural land in the northern portion of the basin is pasture with some poultry farming. In the southern portion of the basin, row crops and some orchards (Stell et al, 1995) dominate agriculture. Over 60 percent of the human population resides in Metropolitan Atlanta, which is the largest and fastest growing metropolitan area in the Southeast and is located in the headwaters of the basin (Frick et al, 1998).…”

“…Surface water provides the majority of public water supply in the Blue Ridge and Coastal Plain provinces of the ACF Basin, which makes nonpoint source pollution an important concern in this basin. Phenoxy-acid herbicides are widely used in residential, commerciallindustrial, agricultural, and silvicultural areas of the basin and were commonly detected at surface water sites, along with organophosphorus insecticides (Stell et al 1995). The Ichawaynochaway HUC, with a 620 mi2 drainage area, was chosen for modeling with NPSM.…”

Water Resources and Land Use and Cover in a Humid Region: The Southeastern United States

“…However, most concentrations were below levels considered to be a health risk. Row crop pesticide application may be fairly frequent and corresponds to crop cycles with preplant, preemergent, and possibly postemergent application (Stell et al, 1995). Pesticide application in the Apalachicola‐Chattahoochee‐Flint River Basin in Georgia may occur year‐round, although rates are highest from March to September (Stell et al, 1995).…”

“…Row crop pesticide application may be fairly frequent and corresponds to crop cycles with preplant, preemergent, and possibly postemergent application (Stell et al, 1995). Pesticide application in the Apalachicola‐Chattahoochee‐Flint River Basin in Georgia may occur year‐round, although rates are highest from March to September (Stell et al, 1995). Pesticides are commonly found in surface waters, and concentrations may exceed the USEPA's health standards, as was found for atrazine concentrations in 27% of samples from the Mississippi, Ohio, and Missouri Rivers (de la Crétaz and Barten, 2007).…”