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Evaluation of Water Quality from a Drainage-Subirrigation System in Georgia

by Daniel L. Thomas, Univ of Georgia, Tifton, GA, USA,
Adel Shirmohammadi, Univ of Georgia, Tifton, GA, USA,
R. Richard Lowrance, Univ of Georgia, Tifton, GA, USA,



Document Type: Proceeding Paper

Part of: Steel Structures

Abstract:

Nitrate-N, Ammonium-N and Phosphate-P concentrations were measured from shallow subsurface wells and outlets of a drainage-subirrigation system in the Georgia flatwoods for comparison to adjacent forested and cleared areas. Nitrate-N concentrations did not exceed 10 mg/1 from any of the outflow samples. However, Nitrate-N concentrations were significantly higher in the drained-subirrigated area than in the forested and cleared areas. Ammonium-N and Phosphate-P concentrations were relatively low and do not appear to be a problem based on the limited data available. Additional monitoring and modeling are required to form more definite conclusions.

Subject Headings: Water quality | Drainage systems | Nitrates | Developing countries | Water pollution | Subsurface drainage | Irrigation systems | Georgia | United States

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