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United States Department of Agriculture

Agricultural Research Service


item Savabi, M
item Norton, Lloyd
item Shinde, Dilip

Submitted to: American Geophysical Union
Publication Type: Abstract Only
Publication Acceptance Date: 3/21/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Non-point source water pollutants resulting from agricultural areas have been implicated as a source of water quality degradation in south Florida. The nutrients loading from agricultural and urban areas has increased nutrient concentrations, particularly phosphorus at the Everglades National Park. It is reported that nutrient-enriched waters affect vegetation type and patterns. The plan is to continue discharging phosphorous at the current control target of 50ppb to allow eutrophication of over 95% of the Everglades marshes. The objective of this study is to investigate the movement of phosphorus and Atrazine in the soils in south Florida. Three typical soils from the region, Krome (moderately well drained ),Chekika (poorly drained ), and Perrine (very poorly drained) were selected and used for this study. The soils were placed in a 1 cubic meter boxes with drainage tubes. The soils were packed to the field observed bulk density. Triple Super Phosphate was mixed with the soil while Atrazine solution was sprayed over the soil. The study design was a completely randomize design with three soils, two treatments (phosphorus and Atrazine), and three replications. A rainfall simulator was used to simulate rainfall of 65mm/hour intensity. Surface runoff and sediment samples from each soil box were collected during the 60 min rainfall simulations. From each runoff-sediment samples, a chem sample was taken to measure the concentration of chemicals. Results of our study will be presented in the meeting. The results should indicate the vulnerability of these soils to flooding, erosion & agrochem movement in south FL.

Last Modified: 06/25/2017
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