SWMM Update - Onondaga County Save the Rain

SWMM Update Onondaga County Save the Rain Program Joanne M. Mahoney, County Executive

ACJ Quarterly Meeting February 26, 2013

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Outline 1. Model Development p 2. Calibration Plan 3. Next Steps Next Steps

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Outline 1 Model Development 1.

M d lD l t

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Model Network

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Subcatchment Changes

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Boundary Condition Changes

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EBSS Operation

2. Calibration Plan 3. Next Steps

1.

Model Development

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Original Model Network - 2011 • 2 separate models with free outfalls

Onondaga Lake

• HBIS: 3 pump stations (PS) • MIS: 1 PS, 1 RTF and EBSS gates • Not geo‐referenced • Used SWMM default Used SWMM default infiltration parameters • Imperviousness obtained by visual interpretation of aerial photos h

HBIS

• Simplified wet weather operation controls

MIS

• Model network vs Model network vs GIS trunk GIS trunk sewer alignments (shown as background)

1.

•Updated p Model Network - 2012 Onondaga Lake

Model Development

5 • One combined model with One combined model with refined boundary conditions (Metro Headworks) • 1,807 vs. 503 nodes; 1,909 vs.

577 conduits; and 456 vs. 94 subcatchments • HBIS: 3 pump stations (PS) • MIS: 4 PS, 2 RTFs and modified MIS: 4 PS 2 RTFs and modified EBSS gates • Geo‐referenced • Used USDA soil survey data

HBIS

• Imperviousness based on Syracuse aerial survey GIS land cover and supplemented with Landsat imagery imagery

MIS

• Improved wet weather operation controls • Calibrated Creek/Brook tailwater conditions based on USGS stream gauges

1.

Subcatchment Delineation • LIDAR DEM (Light Detection (Light Detection And Ranging Digital Elevation Model) Model) provides base for ArcHydro delineation

Onondaga Lake

Model Development

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1.

Subcatchment Delineation • LIDAR DEM provides base id b for ArcHydro delineation • Incorporate sewers into DEM

Onondaga O d Lake

Model Development

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1.

Subcatchment Delineation • LIDAR DEM provides base for id b f ArcHydro delineation • Burn sewers into i DEM • ArcHydro Subcatchment Delineation • Manual modifications based on sewer network and aerial imagery

Onondaga Lake

Model Development

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1.

Model Development

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Subcatchment - Imperviousness p • Detailed d li delineation ti • Landsat reflectivity fl i i classification

1.

Subcatchment - Infiltration • USDA WSS ( b il (Web Soil Survey) data • Subcatchment boundaries intersected by soil data soil data • Infiltration parameters found by area‐ weighted average

Onondaga Lake

Model Development

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1.

Subcatchment - Infiltration • Green‐Ampt Infiltration Parameters

Model Development

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1.

Subcatchment - Flow Routing g

impervious

pervious

Model Development

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Manhole to combined sewer

impervious

ML_Impcov_v2 Feature Driveway Flat Rooftop Non-Flat Rooftop Parking Area Roadway Roadway Median Sidewalk

1.

Model Development

Receiving g Water Boundary y Conditions

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• Original model: no boundary condition • Updated model: Updated model:

South of West Seneca Turnpike

▫ Water surface and bank elevation obtained from LIDAR DEM ▫ River depth based on USGS stream River depth based on USGS stream gauge depth

Lake

Receiving g Water Boundary y Conditions

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• Harbor Brook Profile

Velasko Road Flood Control Gate

Covered Culvert

Open Channel

Lake

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Model Development

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METRO Boundary y Conditions Liverpool PS

Ley Creek PS

Original Model: • Simplified METRO boundary conditions • MIS and HBIS were modeled as free outfalls Updated Model: Updated Model: • Added Force Main flows from Ley Creek PS, Westside PS and Liverpool PS

Onondaga Lake

• Refined Headworks setup • Added hydraulic structures

Westside PS

• Incorporated wet weather Incorporated wet weather operation as real time controls METRO

1.

Model Development

Force Main Flow Calibration-Liverpool p PS

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1.

Model Development

Force Main Flow Calibration-Ley Creek PS

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1.

Force Main Flow Calibration-Westside PS

Model Development

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1.

Model Development

Wet Weather Operations-EBSS

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Original Model: Original Model: no gate #1 with simplified Real Time Control (RTC) rules t #1 ith i lifi d R l Ti C t l (RTC) l Updated Model: added gate #1 and RTC rules based on wet weather operation procedures

Gate #1 Weir TOW 384.2 ft

Onondaga Creek

Gate #1

Gate #4 Weir 080D Weir 401.04 ft TOW 399.6 ft Gate #3 Weir TOW 394.09 ft

080H Weir 409.5 ft 080G Weir 407.2 ft

080E Weir 080E Weir 398.79 ft

080B Weir 398.22 ft 080C Weir 395.63 ft

Gate #4

080A Weir 385.38 ft

Gate #3 Gate #3 Gate #2

080F Weir 409.07 ft

EBSS Starts St t east of Beech Street

1.

Model Development

Wet Weather Operations-EBSS During Small Storms

No overflows from 080 regulators No overflows from 080 regulators Gate status: Gates 1, 3 and 4: Open Gate 2: Closed Gate #1 Weir TOW 384.2 ft

Onondaga Creek

Gate #1

Gate #3 Weir TOW 394.09 ft

080H Weir 409.5 ft 080G Weir 407.2 ft

080E Weir 080E Weir 398.79 ft

080B Weir 398.22 ft 080C Weir 395.63 ft

Gate #4

080A Weir 385.38 ft

Gate #3 Gate #3 Gate #2

Gate #4 Weir 080D Weir 401.04 ft TOW 399.6 ft

080F Weir 409.07 ft

EBSS Starts St t east of Beech Street

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1.

Model Development

Wet Weather Operations-EBSS During Large Storms

Overflows from 080 regulators Overflows from 080 regulators Gate status during storage mode Gate status during storage mode:: Gates 1, 3 and 4: Closed Gate 2: Open/Closed based on MIS water level Gate #1 Weir TOW 384.2 ft

Onondaga Creek

Gate #1

Gate #3 Weir TOW 394.09 ft

080H Weir 409.5 ft 080G Weir 407.2 ft

080E Weir 080E Weir 398.79 ft

080B Weir 398.22 ft 080C Weir 395.63 ft

Gate #4

080A Weir 385.38 ft

Gate #3 Gate #3 Gate #2

Gate #4 Weir 080D Weir 401.04 ft TOW 399.6 ft

080F Weir 409.07 ft

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EBSS Starts St t east of Beech Street

1.

Model Development

Wet Weather Operations-EBSS After Storms

No overflows from 080 regulators Gate status during drain mode: Gate 1: Closed Gates 3 & 4: Open/Closed based on water level Gate 2: Open/Closed based on MIS water level p Gate #1 Weir TOW 384.2 ft

Onondaga Creek

Gate #1

Gate #3 Weir TOW 394.09 ft

080F Weir 409.07 ft

080H Weir 409.5 ft 080G Weir 407.2 ft

080E Weir 080E Weir 398.79 ft

080B Weir 398.22 ft 080C Weir 395.63 ft

Gate #4

080A Weir 385.38 ft

Gate #3 Gate #3 Gate #2

Gate #4 Weir 080D Weir 401.04 ft TOW 399.6 ft

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EBSS Starts St t east of Beech Street

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Outline 1 Model Development 1.

M d lD l t 2. Calibration Plan (2009 Baseline)

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Dry Weather Flow

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Wet Weather Flow

3. Next Steps

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Flow Meter (FM) Locations (2004 & 2009)

Calibration

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2.

Calibration

Dry y Weather Flow (DWF) ( ) Calibration Original Model‐2011 DWF to 101 nodes

Updated Model‐2012 DWF to 379 nodes

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Dry Weather Flow Calibration Charts

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2.

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Rain Gauge g Locations 2004 ‐ 1 RG (Metro)

Calibration

2009 ‐ 3 RGs

2.

Calibration

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Harbor Harbor Brook S Sewershed h d Flow Meter Locations

2.

Calibration

Clinton Sewershed Flow Meter Locations

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2.

Calibration

Midland Sewershed Flow Meter Locations

CSO 077 is located p of CSO 060 upstream and does not have a separate discharge to a receiving water body.

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2.

Calibration Graphs: 030 Overflow

Calibration

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Outline 1 Model 1.

M d l Development Model Development D l t 2. Calibration Plan 3. Next Steps

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Next Steps 1.

2009 Annual Capture Baseline

▫ ▫ ▫ 2.

▫ ▫ ▫ ▫ 3.

Incorporate 2013 weir survey elevation data Finalize results for 4/1/2013 ACJ Report rd d party review with CDM Coordinate 3 di i ih 2012 Annual Capture Update Estimate Incorporate 2013 weir survey elevation data Incorporate 2013 weir survey elevation data Incorporate 2010‐‐2012 green infrastructure projects Incorporate 2010 Validate Validate model using 2012 flow monitoring data model using 2012 flow monitoring data Identify priority GI project areas for 2013 focus 2013 Annual Capture Goal: 89.5% 12/31/2013 (4/1/2014 ACJ R Report) )

Questions?