Presented to the

Innovyze Santa Barbara User MeetingPresented by:

Jeroen OlthofWater Systems Consulting, Inc.

August 22, 2018

Agenda Hydraulic Model Development

Infrastructure Dry weather flows Wet weather flows Calibration

System Evaluation On-Going Uses

Review new transportation infrastructure projects Evaluate proposed new developments Support condition assessment and rehabilitation programs

Use as Part of Coordinated Toolset Cartegraph OMS for maintenance history POSM for CCTV inspection results Future InfoMaster

Slide 2

System Statistics Service area population approximately 92,000 Approximately 6,000 manholes Approximately 250 miles of pipe 7 pump stations

Slide 3

Collection System Infrastructure Previous model focused on larger pipes; contained about 71 miles of pipe,

or roughly 25% of the system For this update, objective was an all-pipes model Initial model construction

GIS database was primary data source Nodes (manholes and cleanouts) identified using City’s atlas map

numbering system, e.g. MH-D07-010 Connectivity generally good Some missing rim elevations – populated using ground topography Many missing invert elevations – populated using pipe slopes, record

drawings, and typical depths (sources noted) Previous model used as reference

Slide 4

Model Network

Slide 5

Tributary Areas Based on Flow Monitoring Approximately 50 basins were defined based on previous work and were

refined for each flow monitor point Used tools in InfoSewer to generate Theissen polygons around each

manhole to generate sub-basins at each manhole Flow parameters (such as diurnal flow patterns and rainfall response

factors) that applied to a basin were applied to the sub-basins within that basin

Tributary Areas Based on Flow Monitoring

Slide 7

Tributary Areas

Slide 8

Flow Assignment: Water Use Data

Slide 9

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2

4

6

8

10

12

14

16

18

Mon

thly

Ave

rage

Wat

er U

se (m

gd)

Dry Weather Flow Assignment Water consumption data available at each meter “Water to Sewer” factors developed for different land uses

Slide 10

Consolidated Category

Wastewater Flow : Winter Water

Demand

Assigned Cap for Wastewater

Production (gpd)Single Family Residential

95% 300

Multiple Family Residential

95% N/A

Commercial 90% N/AIndustrial 95% N/AInstitutional 90% N/AOpen Space 10% N/A

Load Points for sanitary flow based on winter water use

Slide 11

Dry Weather Calibration (Steady State)

Slide 12

Dry Weather Diurnal Patterns

Slide 13

Dry Weather Calibration

Slide 14

0.00

2.00

4.00

6.00

8.00

10.00

12.00

14.00

0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00

Flow

(mgd

)

Time

WWTP Modeled Dry Weather Flow Average June 2014 Effluent (mgd) Average June 2014 Confluent (mgd)

Wet Weather Flow Assignment Storm events Contributing area and

response factors for each basin

Slide 15

Wet Weather Calibration at El Estero WWTP

Slide 16

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5

10

15

20

25

30

35

3/19/11 0:00 3/19/11 12:00 3/20/11 0:00 3/20/11 12:00 3/21/11 0:00 3/21/11 12:00 3/22/11 0:00

March 2011 Confluent (mgd) March 2011 Effluent (mgd) WWTP Modeled March 2011 Event

Parcels with Additional Flow due to future development (or septic conversion)

Slide 17

Initial System Evaluation: Potential Constraints under Design Conditions

Slide 18

0

5

10

15

20

25

30

35

40

0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00

Flow

(mgd

)

2014 Dry Weather Flow (mgd) 2014 Design Storm Wet Weather Flow (mgd)

2050 Dry Weather Flow (mgd) 2050 Design Storm Wet Weather Flow (mgd)

Predicted Surcharging

Slide 19

Proposed System Improvements

Slide 20

Continuing Use of Model Identify areas for follow-up flow monitoring or real-time monitors

Evaluate new transportation infrastructure projects Sizing for new inverted siphons

Evaluate new developments Add flow, route downstream

Evaluate operational changes Influent gate closure

Support planning for rehabilitation projects

Incorporation of model results into InfoMaster

Slide 21

Route flows downstream from new development or new bridge

Slide 22

Downstream profile

Slide 23

Gate Closure

Slide 24

Gate Closure

Slide 25

-10

-8

-6

-4

-2

0

2

4

6

8

10

- 100,000 200,000 300,000 400,000 500,000 600,000 700,000 800,000 900,000 1,000,000

Wat

er S

urfa

ce E

leva

tion

Volume in Model Pipes Below Water Surface (gallons)

Estimated System Storage

Gate Closure

Slide 26

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200,000

400,000

600,000

800,000

1,000,000

1,200,000

1,400,000

1,600,000

1,800,000

2,000,000

0

2

4

6

8

10

12

14

0:00 1:3

0

3:00

4:30

6:00

7:30

9:00

10:3

0

12:0

0

13:3

0

15:0

0

16:3

0

18:0

0

19:3

0

21:0

0

22:3

0

0:00

Acc

umul

ated

Vol

ume

(gal

lons

)

Flow

(mgd

)

Flow (mgd) Accumulated Volume (gallons)

Questions and Discussion

Slide 27