Lake Simcoe and Lake Couchiching Source Water Protection Studies

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Lake Simcoe and Lake CouchichingSource Water
Protection Studies

• Presentation to SPC

27 Mar 2008
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Source Water Technical Studies
MODULE 1 WATERSHED CHARACTERIZATION
MODULE 4 SURFACE WATER VULNERABILITY ANALYSIS
MODULE 2 LONG TERM MUNICIPAL SUPPLY STRATEGY
MODULE 3 GROUND WATER VULNERABILITY ANALYSIS
MODULE 5 ISSUES EVALUATION AND THREATS INVENTORY
MODULE 7 WATER BUDGET/WATER QUANTITY RISK
ASSESSMENT
MODULE 6 WATER QUALITY RISK ASSESSMENT
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MODULE 4 SURFACE WATER VULNERABILITY ANALYSIS
INTAKE CHARACTERIZATION
DELINEATE INTAKE PROTECTION ZONES
MODULE 5 ISSUES EVALUATION AND THREATS INVENTORY
Refine IPZs
EVALUATE PREFERENTIAL PATHWAYS
by LSRCA
VULNERABILITY SCORING
UNCERTAINTY ANALYSIS
MODULE 6 WATER QUALITY RISK ASSESSMENT
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Intake Locations
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Intake Characterization

• Technical Characteristics (length, depth)
• Operator Interview
• Response Time
• Hydrodynamic Conditions
• Sediment Characteristics
• Shoreline Development
• Raw Water Quality

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Data Input to Intake Characterization

• Treatment Facility
• Engineers Reports, Drawings, C of A
• Interview Operator
• Raw Water Quality
• Surrounding Land Use
• Physical Characteristics of Lake
• Bathymetric Features
• Local Hydrodynamic Conditions
• Lakebed Sediment

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Delineate Intake Protection Zones

• IPZ-1
• IPZ-2
• TWCA (IPZ-3)
• Currently under review for modification by MOE

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Delineate Intake Protection Zones

• IPZ-1
• Area closest to the source water intake
• Set 1 km radius
• IPZ-2
• area upstream
• Based on Operator defined shut-down time and
• Current velocities

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Numerical Model used to Define Currents

• DHI MIKE-3
• 3-D
• Hydrodynamic Model

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Why is a 3D model necessary?

• Currents are very complex.
• They vary spatially.
• They also vary with depth.

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Data Required for Model

• Intake Locations
• Bathymetry data
• Wind Data
• Currents (ADCP)
• Stream Gauge Data (HYDAT)
• Water Levels

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Bathymetry
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Wind Data
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Currents

• ADCP Data
• Used to calibrate model

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Reverse Particle Tracking used to Delineate IPZ-2s
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First lets look at Forward Particle Tracking.
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Reverse Particle Tracking used to Delineate IPZ-2s
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Intake Protection Zones and Vulnerability Scores

• IPZ-1
• IPZ-2
• IPZ-3

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Innisfil
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Innisfil
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Innisfil
Travel time contours.
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Innisfil
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Innisfil

• Summary of Vulnerability Scores

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Georgina
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Georgina

• Summary of Vulnerability Scores

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Keswick
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Keswick

• Summary of Vulnerability Scores

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Beaverton
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Beaverton

• Summary of Vulnerability Scores

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South Ramara
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South Ramara

• Summary of Vulnerability Scores

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Lagoon City
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Lagoon City

• Summary of Vulnerability Scores

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Orillia
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Orillia

• Summary of Vulnerability Scores

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Mnjikaning
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Mnjikaning

• Summary of Vulnerability Scores

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West Shore
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West Shore

• Summary of Vulnerability Scores

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Washago
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Washago
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Washago

• Summary of Vulnerability Scores

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Sand Castle Estates
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Sand Castle Estates

• Summary of Vulnerability Scores

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Source Water Technical Studies
MODULE 1 WATERSHED CHARACTERIZATION
MODULE 4 SURFACE WATER VULNERABILITY ANALYSIS
MODULE 2 LONG TERM MUNICIPAL SUPPLY STRATEGY
MODULE 3 GROUND WATER VULNERABILITY ANALYSIS
MODULE 5 ISSUES EVALUATION AND THREATS INVENTORY
MODULE 7 WATER BUDGET/WATER QUANTITY RISK
ASSESSMENT
MODULE 6 WATER QUALITY RISK ASSESSMENT
Next Steps
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Questions/Discussion
March 27, 2008