Occurrence of deeethylatrazine and deisopropylatrazine in surface and ground water
Conference
·
OSTI ID:369973
- US Geological Survey, Lawrence, KS (United States)
Field-disappearance studies and a regional study of nine rivers in the Midwest show that deethylatrazine (DEA) and deisopropylatrazine (DIA) occur frequently in surface water that has received runoff from two parent triazine herbicides, atrazine and cyanazine. The concentration of DEA and DIA in surface water varies with the hydrologic conditions of the basin and the timing of runoff, with maximum concentrations reaching 5 mg/L (DEA + DIA). Early rainfall followed by a dry summer will result in an early peak concentration of metabolites in surface water. A wet summer will delay the maximum concentrations of metabolites and increase their runoff into surface water, occasionally resulting in a slight separation of the parent atrazine maximum concentrations from the metabolite maximum concentrations giving a {open_quotes}second flush{close_quotes} of triazine metabolites to surface water. Replicated field dissipation studies of atrazine and cyanazine indicate that DIA/DEA ratios will vary from 0.4{plus_minus}0.1 when atrazine is the major triazine present to 0.6{plus_minus}0.1 when significant amounts of cyanazine are present. A comparison of transport time of DEA and DIA from field plots to their appearance in surface water indicates that storage and dilution are occurring in the alluvial aquifers of the basin.
- OSTI ID:
- 369973
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Occurrence of atrazine and degradates as contaminants of subsurface drainage and shallow groundwater
Triazine herbicides in the hydrologic cycle in the Mississippi River basin
Atmospheric transport and deposition, an additional input pathway for triazine herbicides to surface waters
Journal Article
·
Mon Feb 28 23:00:00 EST 1994
· Journal of Environmental Quality
·
OSTI ID:245366
Triazine herbicides in the hydrologic cycle in the Mississippi River basin
Conference
·
Tue Oct 01 00:00:00 EDT 1996
·
OSTI ID:369972
Atmospheric transport and deposition, an additional input pathway for triazine herbicides to surface waters
Conference
·
Tue Oct 01 00:00:00 EDT 1996
·
OSTI ID:369971