Ann D Hirekatur Project Manager State of Lake Wisconsin Meeting July 13, 2013 Wisconsin River Basin...
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Transcript of Ann D Hirekatur Project Manager State of Lake Wisconsin Meeting July 13, 2013 Wisconsin River Basin...
Ann D HirekaturProject Manager
State of Lake Wisconsin MeetingJuly 13, 2013
Wisconsin River Basin Water Quality Improvement Project
Part I. Project Overview• Geographic Extent• Water quality concerns• History/Current Status• Framework• Goals
Part II. Total Maximum Daily Load (TMDL) • What is it?• Development• Implementation• Timeline/Next Steps
Wisconsin River Basin Water Quality Improvement Project
PROJECT OVERVIEWPart I
Wisconsin River Basin Water Quality Improvement Project
The Wisconsin River Basin (WRB) Water Quality Improvement Project
The Wisconsin River Basin (WRB) Water Quality Improvement Project
Water Quality Concerns within the WRB
Petenwell and Castle Rock FlowagesFish Kills in Big Eau Pleine ReservoirDells of the Eau Claire
Runoff in the Baraboo
The WRB – A managed system
http://www.lakenokomiscc.org
How did we get a Water Quality Project in the WRB?
1995 2000 2005 2010 2015
1996Petenwell
Castle RockComprehensive
Management Plan
2001WDNR/USACE develop joint TMDL
monitoring proposal for $1.5 million. Proposal not funded
2004WDNR proposal to USEPA for river
water quality monitoring. Proposal not funded
2008First Pontoons and
Politics at Petenwell Castle Rock
2010WNDR receives Section 22 Planning
Assistance from USACE
2009 – 2013Wisconsin River TMDL
Monitoring
2009State legislature appropriates $750,000 ($150,000/yr. for 5 years) for monitoring
upstream of Castle Rock
Wisconsin RiverTMDL
Project Framework = Total Maximum Daily Load
A TMDL answers the following questions:• How much is the existing
pollutant load?
• What is the contribution from each pollution source?
• How much does pollution need to be reduced in order for waterway to achieve water quality standards and designated uses?
• How will the pollutant load reductions be achieved?
TMDL
The Framework for Wisconsin River Basin Water Quality Improvement Project
How will the TMDL help Lake Wisconsin?
- Fish & Aquatic Life
- Recreation
- Phosphorus - Nuisance Algae
Blooms
TOTAL MAXIMUM DAILY LOAD(TMDL)
Part II
Wisconsin River Basin Water Quality Improvement Project
Part I. Project Overview• Geographic Extent• Water quality concerns• History/Current Status• Framework• Goals
Part II. Total Maximum Daily Load (TMDL) • What is it?• Development• Implementation• Timeline/Next Steps
Wisconsin River Basin Water Quality Improvement Project
Why develop a TMDL?
Does not meet water
quality standards
Baseline Pollutant
Load
Total Maximum Daily Load
Meets water quality standards
Designated Uses - Fish & Aquatic Life - Public Health - Recreation
Water quality criteria - Numeric - Narrative
What are water quality standards?
Why develop a TMDL?
Does not meet water
quality standards
Baseline Pollutant
Load
Total Maximum Daily Load
Meets water quality standards
Baseline Pollutant
Load
Developing a TMDL
What is the magnitude of theTotal Maximum Daily Load ?
TMDL Load
?
What is the TMDL for each water body?
Developing a TMDL
How will the TMDL be apportioned among loading sources?
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?
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Baseline Pollutant
Load
WRB Total Maximum Daily Load (TMDL)
Waste Load Allocation• Municipal Wastewater• Industrial Wastewater• Stormwater (MS4s)
Load Allocation• Runoff from the landscape
Background Load• Naturally occurring from
wetlands, forests
Load Allocation
Waste LoadAllocation
Margin of Safety
TMDL
+ +
Each subwatershed is assessed for:
TMDL Development - Monitoring (2009-2013)
What are the measured flows, and pollutant concentration/loads:
Entering from tributaries? On the main stem of the river?
What are the measured reservoir conditions in response to loads/flows?
TMDL Development – Monitoring (2009-2013)
Tributary Watershed Loads19 stations with daily discharge & bi-monthly water quality
Main stem Loads13 stations with daily discharge & bi-monthly water quality
Reservoirs5 major reservoirsBig Eau Pleine, Lake Dubay, Petenwell, Castle Rock & Lake Wisconsin
Phosphorus Evaluation Sites98 stations with monthly P samples
TMDL Development – Conceptualization (2013-2014)
What’s going on in the watershed?• Land use/management• Climate• Soils, topography, slope• Hydrography
What’s going on in the reservoir system?• Size, shape, depth, volume• Hydrologic budget (rain,
evaporation, inflow, outflow)• Pollutant concentration• Chemical conditions
TMDL Development – Modeling (2013-2015)
Watershed Modeling• What is the existing/baseline load?• How much of the load is coming
from each source?
Reservoir Modeling• How does system respond to current
conditions? • What load reduction is needed to
meet water quality standards?
Baseline Pollutant
Load?
TMDL Development - Modeling
Watershed Modeling• What is the existing/baseline load?• How much of the load is coming
from each source?
Reservoir Modeling• How does system respond to current
conditions? • What load reduction is needed to
meet water quality standards?
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?
? ?
TMDL Development – Modeling (2013-2015)
Watershed Modeling• What is the existing/baseline load?• How much of the load is coming
from each source?
Reservoir Modeling• How does system respond to
current conditions? • What load reduction is needed to
meet water quality standards?
TMDL Development – Modeling (2013-2015)
Watershed Modeling• What is the existing/baseline load?• How much of the load is coming
from each source?
Reservoir Modeling• How does system respond to current
conditions? • What load reduction is needed to
meet water quality standards?
Baseline Pollutant
Load
TMDL
EXAMPLE
Integrating Monitoring & Modeling
Proportional Allocation Method
• Proportional allocation method is developed from baseline conditions
• Baseline Conditions reflect current regulatory requirements.
• The TMDL load for each reach is divided proportionally according to each source’s baseline load contribution
TMDL Development – Allocations (2016-2017)
Baseline
TMDL
TMDL Project Implementation (2017 Onwards)
TMDL load allocations are incorporated in permit limits• Industrial Wastewater• Municipal Wastewater• Municipal Stormwater
Work with county staff and other partners implement agricultural land management practices to achieve nonpoint TMDL load allocations
TMDL Development Timeline
2009-2013 Monitoring
2013 - 2014
Watershed Concept/
Modeling
2015-2016
Allocations(Dividing the
pie)
2016 Draft TMDL
2017 Final
TMDL
2017 – Implement-
ation
WDNR Goal
Ann D HirekaturProject Manager
State of Lake Wisconsin MeetingJuly 13, 2013
Wisconsin River Basin Water Quality Improvement Project
Questions?