000004929 001__ 4929
000004929 005__ 20141119144605.0
000004929 04107 $$aeng
000004929 046__ $$k2002-06-02
000004929 100__ $$aGoetchius, Kristin M.
000004929 24500 $$aMODELING THE FATE AND TRANSPORT OF ATRAZINE IN THE UPPER CHESAPEAKE BAY

000004929 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004929 260__ $$bColumbia University in the City of New York
000004929 506__ $$arestricted
000004929 520__ $$2eng$$aThe fate and transport of atrazine, including effects of photodegradation and a potential reaction with polysulfides, in the Upper Chesapeake Bay is investigated. A hydrodynamic model that includes all relevant physical and chemical processes is used to show that atrazine is transported vertically down the water column to the sediment water interface where it may react with naturally occurring polysulfides. Limited field data supports these results. Based on reaction rates reported in the literature, model results show that neither photolysis nor the reaction with polysulfides decrease the concentration of atrazine in the Upper Bay in any significant amount. Our modeling study shows that the minimum reaction rate required to decrease the concentration of atrazine in the bottom layer is 1012 M-1s-1. The wide range of reaction rates used to obtain these preliminary results suggests that a potential reaction between an herbicide or pesticide and polysulfides is not a significant removal mechanism for agrochemicals in the Upper Chesapeake Bay.

000004929 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004929 653__ $$aChesapeake Bay, hydrodynamic model, atrazine, photolysis, polysulfides

000004929 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004929 720__ $$aGoetchius, Kristin M.$$iSalmun, Haydee
000004929 8560_ $$ffischerc@itam.cas.cz
000004929 8564_ $$s800360$$uhttp://invenio.itam.cas.cz/record/4929/files/568.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004929 962__ $$r4594
000004929 980__ $$aPAPER