The lake cell drainage structure was operated to create a synthetic runoff event into the wetland cell on June 20, 2007 simulating a one-hour 1.27 cm rainfall event from a 16 ha agricultural field. A mixture of three agricultural pesticides (pesticides, atrazine, metolachlor, and fipronil) were added to the water as it entered the wetland. Water samples (1 L) were collected hourly within the first 24 h and again on days 2, 5, 7, 15, 21, 28, and 56 post-injection at both upstream and downstream ends of the wetland for pesticide analysis.

Results
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