Lake erie monitoring
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Lake Erie Monitoring. Justin Chaffin Stone Laboratory and Ohio Sea Grant The Ohio State University. WLEB Leadership Team Meeting June 11, 2014. Groups monitoring the western basin. Fishing Charter Boats. Univ Toledo USGS Ann Arbor OSU Stone Lab. USGS Sandusky ODNR. OEPA Nearshore.

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Lake Erie Monitoring

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Lake erie monitoring

Lake Erie Monitoring

Justin Chaffin

Stone Laboratory and Ohio Sea Grant

The Ohio State University

WLEB Leadership Team Meeting

June 11, 2014


Groups monitoring the western basin

Groups monitoring the western basin

Fishing

Charter

Boats

Univ Toledo

USGS Ann Arbor

OSU Stone Lab

USGS Sandusky

ODNR

OEPA Nearshore

All groups collect water sample to determine water quality of Lake Erie and to gain a better understanding of how the system works.

LAKE BOTTOM OR THERMOCLINE


Water collection methods

Water Collection Methods

Fishing

Charter

Boats

Univ Toledo

USGS Ann Arbor

OSU Stone Lab

USGS Sandusky

ODNR

OEPA Nearshore

(most samples)

1 meter, pooled

Surface to 2 meter

Surface to

2x Secchi depth

Mid depth, pooled

Surface to

1 meter above sediments

(up to 8 meter)

1 meter above

bottom, pooled

LAKE BOTTOM OR THERMOCLINE


Sampling equipment

Sampling equipment

Fishing

Charter

Boats

Integrated Tube Samplers

Van Dorn Sampler

Univ Toledo

USGS Ann Arbor

OSU Stone Lab

USGS Sandusky

ODNR

OEPA Nearshore

LAKE BOTTOM OR THERMOCLINE

Photo Credit: Justin Chaffin


Why the different methods

Why the different methods?

Fishing

Charter

Boats

Univ Toledo

USGS Ann Arbor

OSU Stone Lab

USGS Sandusky

ODNR

OEPA Nearshore

(most samples)

The study of limnology (inland waters) began in late 1800s. The methods used by researchers reflected the needs of certain projects or sampling equipment available. Scientists independently created monitoring projects using their “favorite” water sampling method. Thus, there is no standard method for collecting a water sample.

LAKE BOTTOM OR THERMOCLINE


Sampling methods pros and cons

Sampling methods pros and cons

Fishing

Charter

Boats

Univ Toledo

USGS Ann Arbor

OSU Stone Lab

USGS Sandusky

ODNR

OEPA Nearshore

(most samples)

Pros:

“photic zone”

Cons: Samples differ among sites.

Composition point differs among phytoplankton.

Dependent on sunlight.

Turbid waters result

in a shallow sample.

Pros: Easy

Cons: Over estimates surface scum compared to water column.

Pros: Represents most of the water column.

Easier than tube sampler.

Cons: Misses surface scum.

Need equal volumes of each sample

Pros: Best represents entire water column.

Cons: Bulky samplers in deep water.

Scums diluted.

LAKE BOTTOM OR THERMOCLINE


Sampling frequency

Sampling Frequency

Fishing

Charter

Boats

Univ Toledo

USGS Ann Arbor

OSU Stone Lab

USGS Sandusky

ODNR

OEPA Nearshore

Every-other week

Event-based

Every-other week

Event-based

One a month

Every-other week

Grid sample Jun& Sept

LAKE BOTTOM OR THERMOCLINE


Water quality analyzes

Water Quality Analyzes

Fishing

Charter

Boats

Univ Toledo

USGS Ann Arbor

OSU Stone Lab

USGS Sandusky

ODNR

OEPA Nearshore

TP,

Chlorophyll a

DRP (SRP),

TDP,

Nitrate,

Nitrite,

Silicate,

Ammonium,

Total Kjeldahl N,

Microcystin**,

Phytoplankton,

Microcystis biovolume

TP,

Chlorophyll a

DRP (SRP),

Nitrate,

Microcystin,

Phytoplankton

TP,

Chlorophyll a

Phytoplankton

TP,

Chlorophyll a

DRP (SRP),

Nitrate,

Microcystin,

Phytoplankton

Total Phosphorus (TP) a measure of lake productivity potential.

Chlorophyll a is a surrogate of phytoplankton biomass

*Different analysis methods

** UT does not regularly measure Microcystin

LAKE BOTTOM OR THERMOCLINE


Water quality analyzes1

Water Quality Analyzes

Fishing

Charter

Boats

Univ Toledo

USGS Ann Arbor

OSU Stone Lab

USGS Sandusky

ODNR

OEPA Nearshore

TP,

Chlorophyll a*

DRP (SRP),

TDP,

Nitrate,

Nitrite,

Urea, TDN,

Ammonium,

Total Kjeldahl N,

Silicate,

Total SS, NVSS,

Microcystin,

Phytoplankton,

Microcystis biovolume

TP,

Chlorophyll a*

DRP (SRP),

Nitrate,

Microcystin,

Phytoplankton

TP,

Chlorophyll a*

Phytoplankton

TP,

Chlorophyll a*

DRP (SRP),

Nitrate,

Microcystin,

Phytoplankton

*Different analysis methods

LAKE BOTTOM OR THERMOCLINE


Lake erie monitoring

A Bayesian Hierarchical Modeling Approach for Comparing Water Quality Measurements from Different Sources

  • Song Qian and Thomas Bridgeman

    • University of Toledo

  • Other team members:

    • OSU Stone Lab, USGS, Univ. Michigan, Ohio EPA, Ohio DNR, Heidelberg University

  • Funded by University of Michigan Water Center, Graham Sustainability Institute

  • Ohio EPA provided funding in 2013 & 2014

  • Ohio Sea Grant/ Stone Lab REU program


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