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Attacking the Big Data Challenge: Integrating Collection System Flow Monitoring and Modeling into Financial Billing
2017 Michigan Section AWWA Annual Conference
Mel Meng, Black & VeatchChuck Schroeder, City of Grand Rapids, MI
Ben Whitehead, Black & Veatch
Agenda
• Annual Sewer Rate Update
• Customer Satisfaction
• Improve Billing Accuracy
• Challenges and Lessons
• Conclusions
• 1ST week of November distributed for customer
communities review
• Revise based on feedback
• Effective January 1st the following year
3
City of Grand Rapids Annual Sewer Rate Update
Wholesale Communities:• City of East Grand Rapids• Ada Township• Caledonia Township• Gaines Charter Township
Retail customers:• City of Grand Rapids• City of Walker• City of Kentwood• Cascade Charter Township• Grand Rapids Charter Township• Tallmadge Charter Township• Wright Township
• Matching cost record
• 151 Flow Segments
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S-9
S-3
S-1
S-6
S-4
S-5
S-7
S-8
S-2
S-60
S-44
S-43
S-94
S-17
S-11
S-77
S-52
S-21
S-22
S-81S-73
S-49
S-50S-35
S-23
S-9A
S-38
S-34
S-76
S-36
S-14S-13
S-45
S-27
S-95
S-59
S-37
S-71
S-97
S-15
S-44
S-66
S-25
S-41
S-12
S-54
S-74
S-40
S-26
S-89S-86
S-85
S-10
S-53
S-90
S-91
S-61
S-79
S-24
S-51S-58
S-18
S-33
S-46
S-55
S-19
S-56
S-16
S-20
S-47
S-63
S-88
S-72S-68
S-39
S-93
S-32
S-64
S-108S-126
S-12A
S-118
S-20A
S-101
S-135
S-129
S-133
S-112
S-128
S-134
S-106
S-111
S-125S-115
S-107
S-40A
S-13A
S-132
S-100
S-55B
S-120
S-105
S-22A
S-130
S-121
S-136
S-113
S-103
S-122
S-131
S-109
S-127
S-110
S-11A
S-108A
City of Grand Rapids
City of Walker
Cascade Township
Ada Township
City of Kentwood
Grand Rapids Township
Tallmadge Township
East Grand Rapids
Wright Township
City of Grand Rapids
ZonegatingFlow Segment: S-1Customer A: xx mgdCustomer B: xx mgdCustomer C: xx mgd…..
4
Zonegating Flow Segments Update
5
City of Grand Rapids Annual Sewer Rate Update
Annual Sewer Rate Update
Allocate cost based on Actual use of the pipes
Use = annual average flow
Total Spending: $100A: $100*25% = $25B: $100*75% = $75
Customer BAvg. Flow: 0.3 mgd
Customer AAvg. Flow: 0.1mgd
Total Spending: $100A: $100*100%=$100B: 0
Total Spending: $100A: 0B: $100*100%=$100
6
Customer loadings
haven’t been updated since
2003
• Customer loadings needed to be developed at 151 Flow Segments
• 37 Flow meters in 2003
7
Annual Sewer Rate Update
2016 Update
More than 100 Meters
Real-time Flow Monitoring Data
Since 2013
Augment Flow Data
All-pipe model calibrated under 2014 condition
developed in 2015
8
Why has my sewer rate increased more than my neighbors?
Concerned Customer
“
”
9
•What has changed from last year?
• It doesn’t look right:
• Is the service area correct?
•Did you use the best available data?
• Is the calculation correct?
10
What Matters to a Customer?
Customer Comments
We found things we overlooked in previous study
The City of Grand Rapids Wastewater Collection System • 127 mi2 Service Area• 11 Customer Communities
Monitoring Network• 5 wholesale meters • 101 permanent flow meters • 7 SCADA runtime data feed
13
All-pipe InfoSWMM Model• Incorporated latest GIS• Calibrated using 2014 Flow
Data
> 24,000 Pipes
14
151 Flow Segments Vs
100 Flow Meters
The Problem
16
Dry Weather Hydrology
Metered BSF Flow: 0.32 mgdWater Bill: 0.1 + 0.3 = 0.4 mgd80% of water returning to sewer
Manhole BWater Bill: 0.3 mgd
Manhole AWater Bill: 0.1 mgd
A
B
Meter
Sewer Loadings: A: 0.1 x 80% = 0.08 mgdB: 0.3 x 80% = 0.24 mgd
17
Dry Weather Hydrology
Metered Flow: 0.32 mgdSimulated Flow: 0.1 + 0.3 = 0.4 mgd2016 Loading is 80% simulated loading
Manhole BSimulated Loading: 0.3 mgd
Manhole ASimulated Loading: 0.1 mgd
A
B
2016Meter
2016 Sewer Loadings: A: 0.1 x 80% = 0.08 mgdB: 0.3 x 80% = 0.24 mgd
18
Estimate 2016 Loadings
SWMM5 Zonegating Model• 254 junctions• 6 dividers• 264 conduits
Water Quality Module Enables Tracing of Flow Sources
19
Routing the Flow – 2016 SWMM Method
Challenges and
Lessons
• Data Quality• Big Data
20
Simulated Flow
Flow Meters
High Accuracy
Meters
• High accuracy flow meters
• At WWTP and MAPS
• High accuracy
• Permanent flow meter data
• Available at 100 locations
• Accurate under normal condition
• All-pipe model simulated flow
• Available at manhole level
• Least accurate
21
Data Quality Issues
• Explore more problems
• Focus on automation
• Stick with simple models
Veeramachaneni, K;2016;Why you are not getting value from your data Science, Harvard Business Review. 2016, Dec. 07, 2016
22
Big Data Principles
• 2016 Zonegating update greatly improved accuracy of the results by augmenting flow data with model simulation results
• Customer communities are satisfied with the results which are considered more accurate and transparent
• The significant improvement of the process directly benefited from the city’s continued investments in a modern digital asset
23
Conclusions
Learn more at bv.com
Mel Meng| Planning [email protected]
Chuck Schroeder| Assistant ESD [email protected]
24
Ben Whitehead| Project [email protected]
Contact Us
GIS
> 10 years effort
Flow Data
Since 2013
Model
2015
25
Leadership – Digital Asset Investment
2017 Michigan Section AWWA Annual Conference
Mel Meng, Black & VeatchChuck Schroeder, City of Grand Rapids, MIBen Whitehead, Black & Veatch
Attacking the Big Data Challenge: Integrating Collection System Flow Monitoring and Modeling into Financial Billing