Baker Road WWTP PPCP & MSP Update Maintenance and … · 2020. 2. 25. · GM BluePlan Baker Road...

1

Baker Road WWTP PPCP & MSP UpdateTM#3 Review

February 20th, 2020

10:30 am – 12:00 pm

GM BluePlan Baker Road WWTP PPCP & MSP Update – Meeting #4 February 20th, 2020

2GM BluePlan Baker Road WWTP PPCP & MSP Update – Meeting #4 February 20th, 2020

Agenda

1. Meeting Objectives

2. Model Scope

3. Existing Model

4. Model Update Approach and Data Review

5. Data Gap Analysis

6. Next Steps


MEETING OBJECTIVES


Discussion

• The primary focus of today is to

– understand model methodology and how data will be

used

– Discuss Key Data Gaps

• Discussion on

– Methodology

– Sources of data

– Gaps


MODEL UPDATE APPROACH


Model Scope

• All-pipes

• Dynamic dry and wet weather

• Calibrated to observed data

• Facility process controls and CSOs accurately

represented


Existing Models

Municipality Model Use in PPCP

Region 2016 MSP Model Trunk and facilities

Lincoln All-pipes model Local network

Grimsby Roberts Road sub-model Network and wet

weather RTK

parameters

West Lincoln No model


Approach Summary

1. Network Update

2. Facilities Update

3. Catchment Delineation and Flow Loading

4. Calibration

5. Validation


Model Update Process

Flow Monitoring

Program

Flow Analysis

Baseline Dry

Weather Flows

Baseline Wet

Weather Flows

Model Update

& Calibration

WWF –

RTK Parameters

WWF –

Validation Data

Validated WW

Model

Full Pipe Network

Update

Updated WW

Model

Region MSP

+Lincoln

Model

Grimsby and

West Lincoln

GIS


Network Review

Ownership% Pipes

Missing Diameter

% Pipes

Missing Inverts

% Pipes

Missing From MH

% Pipes

Missing To MH

Grimsby 1% 13.8% 100% 100%

Lincoln 0% 0% 0% 0%

West Lincoln 3% 10% 0% 0%

Ownership% MHs Missing Rim

Elevation

Grimsby 28.7%

Lincoln 0%

West Lincoln 14.4%


Network Update

• Cross-Reference Existing Model Network against:– GIS infrastructure*

– Existing Local models*

• Identify Discrepancies & Missing Network

• Update Discrepancies to Reflect Current Network– Connectivity

– Diameter

– Material

• Extend Model Network*

Not in Model

No Discrepancy

Attribute Discrepancy


Facilities Review

WWTP

•Secondary bypass logic needs clarity

•>120 MLD?

SPS

•Pump curves where available

•Missing drawdown testing

CSOs

•Configuration

•Key elevations need confirmation


CSO Review - Examples

Grimsby- Murray & Lakeside Drive - CSO

Map Data © 2020 Google

Appendix C in TM#3

MSP model

• Overflow invert elevation 78.89 m

• Diameter = 375 mm

• No “outfall” in model


Baker Road WWTP - CSO

Map Data © 2020 Google

MSP model

• Side flow weir from

Lake Street, 1050 mm

pipe to Baker Road

outfall

• Also effluent pipe in

model?

• MH invert 77.69 m

• Weir height = 1.2 m

Need to review

overflow

configuration!Weir GIS invert 77.69 m

Outfall

elevation

66.961 m


Wastewater Modelling Approach – Facilities Update

Review Key Facilities and Identify New/Modifications

• Existing models

• ECAs

• Facility drawings

Existing Facilities

• Confirm existing model → with ECAs

• Review if discrepancies (see new/upgrade)

• Update facility configuration, pump curves, geometry, etc. as required

Consolidate Available Facility Control Data

• Existing models

• SCADA

Model Review Workshop

• Staff feedback

• Meeting #6 - June 2020


Flow Monitoring- TM #2 Implementation

In addition to historic

Town/Region monitoring


• Region rain gauges

• RGs ideally 5km

radius for event

calibration

accuracy

• Lincoln Rain gauge

for Vineland,

Campden and

Jordan Station?

Rain Gauges


Precipitation Analysis

• Will also discuss in LOS

workshop

• Need consensus on IDF

curve to use for design

storm scenarios


Dry Weather Flow

• Dry Weather Flow (DWF) is the normal (in a typical dry day) amount of flow through a sanitary sewer during periods with no rainfall or snow melt including groundwater infiltration (GWI).– Base sanitary flow (BSF): Sewage

generated from domestic, commercial, and industrial uses.

– Groundwater infiltration (GWI): Groundwater that enters the wastewater system and is a “constant” flow source


Dry Weather Flow Loading

• Develop pipe sewershed

– Parcels allocated to closed sewer

– Limit to parcels fronting sewers

– Limit area to 100m buffer

• Validate

– Identify billed parcels not allocated & verify

– Manual review major water users

• Allocated Base Sanitary Flows Based on Billing

– Base Sanitary Flows – 90% of water billing


Dry Weather Flow Loading

• Confirm Actual Demands – Monitoring Catchment

– PS & FM

• Groundwater Infiltration

– Applied globally by catchments – L/s/ha

– Adjusted to match observed dry weather flow by monitoring catchment

– Allow for seasonal adjustments – Support F-5-5 analysis

• Develop Catchment Based Diurnal Curve


Wet Weather Flow

• Wet-Weather Flow (WWF): Wet-weather flow is

comprised of two parts base flow and rainfall

derived inflow and infiltration (RDII)

– Rainfall inflow: Flow that enters the wastewater system

from service connections such as downspouts, storm and

combined sewers, surface runoff, etc.

– Rainfall infiltration: Flow that enters the sanitary sewer

through sewer defects such as cracks or joint failures

(infiltration includes groundwater seepage through

sanitary sewer pipes, manholes and services).


Wet weather - Unit Hydrograph (RTK) Method

• Unit hydrograph represented by

three triangles

– Slow Response

• groundwater or slow infiltration

– Medium Response

• infiltration with medium time

response

– Fast Response:

• direct inflow and rapid infiltration

• Apply unique RTK hydrographs

for each monitoring catchment R

T T*K


Model Calibration

• Dry Weather Flow Calibration –Pump Station Catchment– Match average/peak dry weather flows

• Adjust diurnal pattern

• Adjust %billing and GWI ratio

– ± 5 -10% accuracy

• Wet Weather Flow Calibration –Pump Station Catchment (Dynamic)– Identify wet weather flow events

• Minimum total depth of 15 mm

• Minimum intensity of 5 mm/hr

– Match peak/total wet weather flows

• Adjust RTK hydrograph parameters

– +15% to -10% accuracy

0

2

4

6

8

10

12

14

16

18

200

50

100

150

200

250

300

350

400

450

500

12:00 AM12:00 PM12:00 AM12:00 PM12:00 AM12:00 PM12:00 AM12:00 PM12:00 AM12:00 PM

Pre

cip

ita

tio

n (

mm

)

Flo

w (

Ls)

Total Flow Model Flows Rain

CE1 CE2

Peak Flow (L/s) Monitor 31.5 29.9

Model 29.7 30.0

Variation

(nominal)

-1.7 0.1

Variation (%) -5% 0%

Total Volume (m3) Monitor 3,727 3,116

Model 3,865 3,213

Variation (%) 4% 3%


Calibration Example


Wet Weather Calibration Example


Model Validation

• Matching Observed Overflows

– At CSO

– WWTP secondary bypassing

• Replication Basement flooding events

– Sewer surcharging in flooding area

– Needs historic records

• Daily total plant influent flows – F-5-5


WWTP Flow Validation (example)

Modelled 2016 Observed- WWTP FM WWTP Records

MonthsSum of Volume 2016

[ML]

Average Flow

[L/s]Sum of Volume 2016 [ML] Average Flow [L/s] Sum of Volume 2016 [ML]

Apr 648.700* 395.380* 1,222.000 471.451 1,212.706

May 796.320 297.312 830.855 310.206 828.009

Jun 643.195 248.146 643.413 248.230 638.699

Jul 710.800 265.382 644.944 240.795 640.299

Aug 708.793 264.633 656.441 245.087 652.650

Sep 773.418 298.386 696.181 268.588 691.159

Oct 819.586 305.998 824.168 307.709 818.144

Total 4,452.113 279.976 4,296.002 298.867 4,268.960


GAP ANALYSIS


Action Items

Category Data Missing Remedial Action Who and When

Network GIS sewer (diameter

greater than 200 mm)

and manhole elements

will be imported into the

model.

Automated spatial scripts and interpolation of

missing data will be used in areas where less than 3

consecutive inverts or diameters are missing

GMBP

Field work/drawings needed for inverts in Grimsby Grimsby

End of March

Facilities WWTP Region to confirm secondary bypassing trigger.

Based on received data, flows exceeding 120 MLD

bypass secondary treatment.

Region

End of March

SPS Our understanding is Region is conducting current

drawdown testing for all stations, including stations

with historic drawdown data, and will have results

prior to model calibration, by April 2020.

Region

End of April

ECA capacities will be used for ideal state. Where

pump curves are not available, the ECA capacity

will be assumed.

Region

End of April

CSOs, CSO Tanks, and

By-Passes

Review and approve CSO configurations, key

element elevations and bypass operational

triggers found in Appendix B.

Region and LAMs

End of March


Action Items

Category Data Missing Remedial Action Who and When

Flow and

Loading Data

Flow Monitoring data

inadequate in West

Lincoln and Grimsby

The flow monitoring program recommended in

Tech Memo #2 will be implemented.

Region has approved

FM program. GMBP to

implement in March

Rain Gauge Locations Lincoln to confirm and provide data for Vineland,

Campden, Jordan Station

Lincoln

End of March

Validation Data

Sewage Water Quality Characterization of untreated sewage water

quality required for F-5-5. Region to provide by

April 2020.

Region

End of April

Basement Flooding LAMs to provide basement flooding shapefiles,

tables with address points, or figures with known

basement flooding. Event date with basement

flooding incident is preferable. By end of April

LAMs

End of April


NEXT STEPS


Next Steps

• Flow Monitoring Program

• Growth Information and

Scenarios

• Policy and Level of Service

• Model Development

Tech MemoTechnical Memorandum #: Growth Scenario

21-Feb

Meeting #4/TCS#3Review of flow Monitoring Program (kick off)Planning Scenario Review

2-Mar

Meeting #5 / TSC #4Policy ReviewLevels of Service

11-May

Tech MemoTechnical Memorandum #5A: Hydraulic Modelling Development

29-May

Meeting #6 / TSC #5Operations workshop #2

Flow analysis summaryModel calibration review

8-Jun

Baker Road WWTP PPCP & MSP Update Maintenance and … · 2020. 2. 25. · GM BluePlan Baker Road...

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Transcript of Baker Road WWTP PPCP & MSP Update Maintenance and … · 2020. 2. 25. · GM BluePlan Baker Road...