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Escherichia coli and Suspended Sediment in Berger Ditch at Maumee Bay State Park, Oregon, Ohio, 2006

U.S. Geological Survey Open-File Report 20071244

By Amie M.G. Brady


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Abstract

Berger Ditch discharges to the marina at Maumee Bay State Park (MBSP), just east of the MBSP bathing beach. Recent studies by U.S. Geological Survey (USGS) and University of Toledo researchers have identified the ditch as a source of Escherichia coli (E. coli), an indicator bacterium that is used to assess recreational water quality. An automatic sampler was installed at a USGS streamgage on Berger Ditch. Samples were collected as a function of streamflow, including negative flow conditions. Instantaneous discharges of E. coli and suspended sediment from Berger Ditch were calculated. When samples were collected, streamflow ranged from -21 to 227 cubic feet per second (ft3/s) and over the entire time period, streamflow ranged from -23 to 243 ft3/s. Discharges of E. coli ranged from 2.5 108 to greater than 2.6 1010 colony-forming units per second (cfu/s), and suspended-sediment discharges ranged from 0.01 to 2.2 kilograms per second (kg/s). One sample was collected during negative flow conditions, and discharges of E. coli and suspended sediment in this sample were -4.3 108 cfu/s and -0.015 kg/s, respectively.

Contents

Abstract

Introduction

Methods

Site Information

Sample Analysis

Results

Streamflow, Escherichia coli, and Suspended Sediment

Berger Ditch Streamflow

Escherichia coli Concentrations and Discharges

Suspended-Sediment Concentrations and Discharges

Correlation Analyses

Acknowledgments

References Cited

Figures

1.–6. Graphs showing:
  1. Instantaneous streamflow, Escherichia coli concentrations, and suspended-sediment concentrations near the mouth of Berger Ditch, Oregon, Ohio, July and August 2006.
  2. Instantaneous streamflow and Escherichia coli concentrations near the mouth of Berger Ditch, Oregon, Ohio, July and August 2006.
  3. Instantaneous discharges of Escherichia coli near the mouth of Berger Ditch, Oregon, Ohio, July 2006.
  4. Instantaneous streamflow and suspended-sediment concentrations near the mouth of Berger Ditch, Oregon, Ohio, July and August 2006.
  5. Relation between Escherichia coli and streamflow 40 minutes prior to sampling in Berger Ditch, Oregon, Ohio, July 2006.
  6. Relation between suspended sediment and streamflow in Berger Ditch, Oregon, Ohio, July–August 2006.

 


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Suggested Citation:

Brady, A.M.G., 2007, Escherichia coli and suspended sediment in Berger Ditch at Maumee Bay State Park, Oregon, Ohio, 2006: U.S. Geological Survey Open-File Report 20071244, 6 p.




For more information about activities of the USGS Ohio Water Science Center, see http://oh.water.usgs.gov/.



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