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Sources and Dynamics of Fecal Coliform Bacteria in University Lake

During the period between July 2  5 and July 2  6 field and lab   examinations were conducted to define the sources and dynamics of   Fecal Coliform (FC) bacteria in University Lake. The goal of the   project was to provide site-specific recommendations towards the   restoration of acceptable water quality in University Lake.   University Lake is located on the Chester Creek waterway in   Anchorage Alaska. It is a water body that has been defined as water   quality limited by the Alaska Department of Environmental  Conservation, being in violation of the drinking water quality   standard of FC. During the biweekly water quality sampling events at   the inlet (UL-1), outlet (UL-2) and storm drain (UL-s) outfall of   University Lake we found that FC loading is highest at the inlet   versus the outlet. Both average and maximum FC values were higher at   UL-1 than UL-2. We found that FC concentration decreased on average   68% from the UL-1 to UL-2 over a 7 day period that also corresponded   to the determined average lake residence time. We also determined   University Lake is more effective in removing FC load during ice   covered conditions, (85% FC load removed) than during ice free   condition (35% load removed). We did not find a positive correlation  between flow and FC concentration at the inlet, suggesting that the   re-suspension theory does explain FC input. We also determined that   Chester Creek is the dominant source of FC to University Lake.   Secondary contributors include intermittent high overland input,   direct water fowl input and extended survivability of FC in Lake   water and sediments. We therefore recommend source tracking to   determine specific source of FCs to Chester Creek and University   Lake. In order to improve the water quality in University Lake, the  load of FC at the inlet must be significantly lowered. Possible   management practices may include increased street sweeping,   restoration of riparian areas, increased education and increased   sediment removal from sedimentation basins.    (microbial source tracking); (MST); (bacterial source tracking);   (BST)

Status
In progress
Type
Project
Start Date
End Date
Researchers
William SchusterPrincipal Investigator
Associated with 3 projects
Khrys DuddlestonResearcher
Associated with 4 projects
David NymanResearcher
Associated with 1 projects
Adinda DemskeResearcher
Associated with 1 projects
Lucas GambleResearcher
Associated with 1 projects
Graham StahnkeResearcher
Associated with 1 projects
Agencies

Funding 2 projects for a total of $130,022.00
Scope of Study
Field Investigation
Laboratory Investigation
Scale of Phenomena
Cellular
Resource Being Monitored
Human Health
Beneficial Use Impairment Assessments
Restrictions on Drinking Water Consumption or Taste and Odour Problems

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Great Lakes - St. Lawrence Region.