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Location of Repository Running head: THE EFFECT OF URBAN RUNOFF 1 The Effect of Urban Runoff on the Dew Drop Pond and the Potential for Restoration

By Kaitlyn J. Nielson and Kaitlyn Nielson


The Dew Drop pond, located on the St. Catherine University campus in St. Paul, Minnesota has two functions: (a) to be a beautiful area to the campus for students ’ enjoyment and (b) the filtration and removal of nutrients and sediment from runoff before it is transferred to the Mississippi River. This study was conducted to evaluate the effect of runoff from the St. Catherine University campus has on the pond, which is filling in and experiencing summer algal blooms. Sediment cores were collected from varying areas of the pond (west buffer (n=4), east buffer (n=3), no buffer (n=3), east island (n=2), west island (n=2)) and segmented into two or three layers based on visual distinction of texture and color in the sediment. Samples were extracted using 2M KCl and 0.5M NaHCO3, shaken 1 hour, and filtered using Whatman 42 filter paper. Extracts were analyzed for ammonium (NH4-N), nitrate (NO3-N), soluble reactive phosphorus (SRP), dissolved organic carbon (DOC), and total dissolved nitrogen (TDN). Following statistical analyses of one-way ANOVA, results show significantly higher concentrations of NH4-N and TDN in the east island region (29404.71mg/kg (p<0.01), 32248.15mg/kg (p<0.05

Year: 2013
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