Wl Network Wdnr Lakes Team Feb4 2010
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Transcript of Wl Network Wdnr Lakes Team Feb4 2010
The Need for a Statewide Lake Water-Level Monitoring Network
Paul F. Juckem, Dale M. Robertson,and William J. Rose
Lakes Partnership Team Meetings.Feb. 3-4, 2010Westin, WI
Clear Lake, Rock County, November 26, 2008
Shell Lake
Fish Lake
Anvil Lake
Historical Water Levels
Historical Water Levels
Are the fluctuations natural or anthropogenic?
Anvil Lake
Shell Lake
Fish Lake
3 billion gallon diversion
Historical Water Levels
Are the fluctuations natural or anthropogenic?
Anvil Lake
Shell Lake
Fish Lake
3 billion gallon diversion
How has lake water quality responded to fluctuations?
What are the best management options (diversion, alum, septic pumping)?
Statewide Lake Water-Level Monitoring Network:
Objectives:• Establish a long-term lake-level monitoring network to
evaluate trends/cycles in various regions of the state. Emphasis will be on relatively natural seepage lakes, which are most responsive and can give indications of regional changes in climate and hydrology.
• Establish baseline conditions for environmental studies and comparison with short-term results.
• Provide information to increase the understanding of different lake hydrologic systems and how they respond to climatic drivers.
• Provide a framework and protocols for facilitating lake water level monitoring by citizen volunteers through the Citizen Lake Monitoring Network (CLMN) program.
Requirements of a proper monitoring station:
Coordination and Consistency:• Water levels must be read in a consistent manor
throughout the year.• Levels must be run from the gauge to an immovable
datum, so levels remain consistent from year to year.• Reference points must be established in case the datum
is destroyed.• A history must be maintained of how a new datum
relates to a prior datum.
Challenges to Water Level Monitoring:
• Anticipating annual trends….
Challenges to Water Level Monitoring:
• Keeping track of a datum….
Challenges to Water Level Monitoring:
• Keeping track of a datum….
Challenges to Water Level Monitoring:
• Keeping track of a datum….
Which Water Level is Correct?W
ater
Lev
el (1
–fo
ot in
terv
al)
Anvil Lake Datum History:
Which Water Level is Correct?W
ater
Lev
el (1
–fo
ot in
terv
al)
Statewide Lake Water-Level Monitoring Network:
Next steps:• Choose a core set of lakes:
– Historical data– Natural hydrologic drivers– Representative distribution across the state
Shell
Anvil
DevilsFish
Lake TypeSeepage LakeDrainage LakeAltered (diversion, augmentation)
Lakes with early water level records in the USGS databaseLong
Beaver Pine
Bear
Emily
Cedar
De Neveu
Fish
Ripley
Long
LittleGreen
Morgan
Pickerel
Pine Wheeler
Silver
Turtle
Amnicon
Big
Bone
Browns
Connors
EagleKoshkonong
North
Mendota &Monona
McKenzie
Rib
Winnebago
Yellow
Boot
Irogami
Anvil
Lake TypeSeepage Lake
Lakes with early water level records in the USGS database
Long
Beaver Pine
Bear
Emily
Cedar
De Neveu
FishLong
LittleGreen
Morgan
Pickerel
Pine Wheeler
Silver
North
Boot
Irogami
Statewide Lake Water-Level Monitoring Network:
• Next steps:• Choose a core set of lakes.• Identify local observers.• Establish datums / verify historical datums.• Install and survey water level gauges.• Develop a protocol for data collection, reporting
and data archiving
Phase Two:• Link these index lakes to Citizen Lake
Monitoring lakes
Water Level Plot
Questions?
Little St.Germain
Whitefish
Shell
SilverKirby
Lac du Flambeau
Delavan
Geneva
Pike
RedCedarLake St. Croix
Muskellunge
McCook
Devils
Clara
Dead PikeLittle RockLac Courte
Oreilles
FishCrystal
Graber
Powers
Green
Whitewater,Rice
Lauderdale
Primary Areas of StudyNutrient Budgets / EutrophicationWater Level / EutrophicationAeration / EutrophicationPesticides / Trace MetalsHydrologyGroundwater
Balsam
Fowler
Wind
Detailed Lake Studies Conducted by the U.S Geological Survey
Cedar
Cedar
MinocquaLTER
Mercer
E. EightmileRound
Tracking a Datum History:The first lake stage
Datum height = 100ft
Staff reading = 0.10ft
Official lake stage = 95.10 ft
Offset = -5.00ft
Tracking a Datum History:The WL & Staff Gauge Move
Datum height = 100ft
Staff reading = 0.24ft
Official lake stage = 94.24ft
Offset = -6.00ft
Tracking a Datum History:The Original Datum is Lost
How to tie the new and historical stages?Need to measure the offset betweenthe old datum and new datum beforethe original datum is lost.