Full TGIF Record # 234127
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DOI:10.1111/j.1752-1688.2010.00507.x
Web URL(s):http://onlinelibrary.wiley.com/doi/10.1111/j.1752-1688.2010.00507.x/full
    Last checked: 12/11/2013
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http://onlinelibrary.wiley.com/doi/10.1111/j.1752-1688.2010.00507.x/pdf
    Last checked: 12/11/2013
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Publication Type:
i
Report
Author(s):Johnson, Henry M.; Domagalski, Joseph L.; Saleh, Dina K.
Author Affiliation:Johnson: Hydrologist, U.S. Geological Survey, Portland, Oregon; Domagalski: Research Hydrologist; Saleh: Hydrologist, U.S. Geological Survey, Sacramento, California
Title:Trends in pesticide concentrations in streams of the Western United States, 1993-2005
Source:Journal of the American Water Resources Association/AWRA. Vol. 47, No. 2, April 2011, p. 265-286.
# of Pages:22
Publishing Information:Minneapolis, Minnesota: American Water Resources Association
Related Web URL:http://onlinelibrary.wiley.com/doi/10.1111/j.1752-1688.2010.00507.x/abstract
    Last checked: 12/11/2013
    Notes: Abstract only
Keywords:TIC Keywords: Atrazine; Chlorpyrifos; Diazinon; EPTC; Herbicide evaluation; Metolachlor; Organophosphate insecticides; Pesticide usage legislation; Simazine; Trifluralin
Abstract/Contents:"Trends in pesticide concentrations for 15 streams in California, Oregon, Washington, and Idaho were determined for the organophosphate insecticides chlorpyrifos and diazinon and the herbicides atrazine, s-ethyl diproplythiocarbamate (EPTC), metolachlor, simazine, and trifluralin. A parametric regression model was used to account for flow, seasonality, and antecedent hydrologic conditions and thereby estimate trends in pesticide concentrations in streams arising from changes in use amount and application method in their associated catchments. Decreasing trends most often were observed for diazinon, and reflect the shift to alternative pesticides by farmers, commercial applicators, and homeowners because of use restrictions and product cancelation. Consistent trends were observed for several herbicides, including upward trends in simazine at urban-influenced sites from 2000 to 2005, and downward trends in atrazine and EPTC at agricultural sites from the mid-1990s to 2005. The model provided additional information about pesticide occurrence and transport in the modeled streams. Two examples are presented and briefly discussed: (1) timing of peak concentrations for individual compounds varied greatly across this geographic gradient because of different application periods and the effects of local rain patterns, irrigation, and soil drainage and (2) reconstructions of continuous diazinon concentrations at sites in California are used to evaluate compliance with total maximum daily load targets."
Language:English
References:82
Note:Map
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Johnson, H. M., J. L. Domagalski, and D. K. Saleh. 2011. Trends in pesticide concentrations in streams of the Western United States, 1993-2005. Water Resour. Bull. 47(2):p. 265-286.
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DOI: 10.1111/j.1752-1688.2010.00507.x
Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1111/j.1752-1688.2010.00507.x/full
    Last checked: 12/11/2013
    Access conditions: Item is within a limited-access website
http://onlinelibrary.wiley.com/doi/10.1111/j.1752-1688.2010.00507.x/pdf
    Last checked: 12/11/2013
    Requires: PDF Reader
    Access conditions: Item is within a limited access website
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