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Barataria-Terrebonne water-quality study, March-August 1999

Dennis Demcheck
US Geological Survey
Baton Rouge, La
Acadian-Pontchartrain
Water-Quality Assessment

Background

Issues

Objectives of Study

  1. Determine the occurrence, distribution, and transport of nutrients and pesticides in the Bayou Grosse Tete/Verret system
  2. Distinguish local use from mid-continent sources

Sites

Constituents Sampled

Atrazine levels in the Verret Basin, Spring 1999

Atrazine, Alachlor, and Metalochlor

Mississippi R. nr. St. Francisville

Levels of atrazine, alachlor, and metalochlor in water collected from the
Mississippi River at St. Francisville, LA

Cancienne Canal

Levels of atrazine, alachlor, and metalochlor in water collected from
Cancienne Canal at LA-Hwy 400.

Bayou Lafourche at Thibodaux

Levels of atrazine, alachlor, and metalochlor in water collected from
Bayou Lafourche at Thibodaux, LA.

Bayou Pierre Part

Levels of atrazine, alachlor, and metalochlor in water collected from
Bayou Pierre Part at Pierre Part, LA.

Conclusions



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