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Title: Triazine herbicides in the hydrologic cycle in the Mississippi River basin

Abstract

Triazine herbicides and their metabolites are present in all compartments of the hydrologic cycle in the Mississippi River basin. In unregulated streams, the occurrence of these chemicals is highly seasonal. Concentrations and mass transport increase abruptly during rainstorms in mid-to-late spring following application and concentrations may briefly exceed 50 micrograms per liter in small to medium sized streams. High concentrations may persist during storm events for several months but generally decrease to trace levels by late summer. In contrast, reservoirs with long hydraulic residence times can collect and store the spring flush of herbicide-laden water. As a result moderate concentrations of herbicides can persist year-round In these reservoirs and in streams that receive the outflow. Rainwater in the Midwest can contain 1 to 3 micrograms per liter of atrazine and smaller amounts of cyanazine and triazine metabolites during May and June, but concentrations decrease to low or undetectable levels by late summer. The seasonal pattern in rainwater is similar to that of streams. Triazine herbicides and metabolites also occur in ground water, but detections are less frequent and concentrations are lower than in surface water. Concentrations rarely exceed health limits when wells are properly constructed. Little or no seasonal variationmore » occurs in ground water.« less

Authors:
; ;  [1]
  1. US Geological Survey, Denver, CO (United States)
Publication Date:
OSTI Identifier:
369972
Report Number(s):
CONF-960376-
TRN: 96:003805-0019
Resource Type:
Conference
Resource Relation:
Conference: Spring national meeting of the American Chemical Society (ACS), New Orleans, LA (United States), 24-28 Mar 1996; Other Information: PBD: 1996; Related Information: Is Part Of 211th ACS national meeting; PB: 2284 p.
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 55 BIOLOGY AND MEDICINE, BASIC STUDIES; ORGANIC CHLORINE COMPOUNDS; ENVIRONMENTAL TRANSPORT; GROUND WATER; HERBICIDES; METABOLITES; MISSISSIPPI RIVER BASIN; STREAMS; WATER POLLUTION; SEASONAL VARIATIONS; CHEMICAL ANALYSIS

Citation Formats

Goolsby, D A, Thurman, E M, and Koplin, D W. Triazine herbicides in the hydrologic cycle in the Mississippi River basin. United States: N. p., 1996. Web.
Goolsby, D A, Thurman, E M, & Koplin, D W. Triazine herbicides in the hydrologic cycle in the Mississippi River basin. United States.
Goolsby, D A, Thurman, E M, and Koplin, D W. 1996. "Triazine herbicides in the hydrologic cycle in the Mississippi River basin". United States.
@article{osti_369972,
title = {Triazine herbicides in the hydrologic cycle in the Mississippi River basin},
author = {Goolsby, D A and Thurman, E M and Koplin, D W},
abstractNote = {Triazine herbicides and their metabolites are present in all compartments of the hydrologic cycle in the Mississippi River basin. In unregulated streams, the occurrence of these chemicals is highly seasonal. Concentrations and mass transport increase abruptly during rainstorms in mid-to-late spring following application and concentrations may briefly exceed 50 micrograms per liter in small to medium sized streams. High concentrations may persist during storm events for several months but generally decrease to trace levels by late summer. In contrast, reservoirs with long hydraulic residence times can collect and store the spring flush of herbicide-laden water. As a result moderate concentrations of herbicides can persist year-round In these reservoirs and in streams that receive the outflow. Rainwater in the Midwest can contain 1 to 3 micrograms per liter of atrazine and smaller amounts of cyanazine and triazine metabolites during May and June, but concentrations decrease to low or undetectable levels by late summer. The seasonal pattern in rainwater is similar to that of streams. Triazine herbicides and metabolites also occur in ground water, but detections are less frequent and concentrations are lower than in surface water. Concentrations rarely exceed health limits when wells are properly constructed. Little or no seasonal variation occurs in ground water.},
doi = {},
url = {https://www.osti.gov/biblio/369972}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Oct 01 00:00:00 EDT 1996},
month = {Tue Oct 01 00:00:00 EDT 1996}
}

Conference:
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