real time savings: transforming real time hydraulic data into actionable information luis...

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Real Time Savings: Transforming Real Time

Hydraulic Data into Actionable Information

Luis Montestruque, Ph.D.President

EmNet, LLC

Patrick Henthorn, P.E.Assistant City Engineer

City of South Bend

Agenda

The Problem

Defining Goals and Objectives

Real Time Monitoring System

From Data to Information

Real Time Decision Support System

Results

3

Case Study: City of South Bend, IN

4

City of South Bend, IN

Population: 107,000 WWTP: 77 MGD 500 miles of sewer lines Combined Sewer System

20 square miles 36 CSO discharge points

Separate Sewer System 20 square miles

LTCP Tunnel, separation, WWTP expansion

LTCP Cost: $450M East Race Environmental

Sensitive Area

South Bend Goals and Objectives

Eliminate dry weather overflows

Prevent basement backups

Better understand system hydraulic performance

Maximize flows to WWTP and explore RTC

Calibrate model

5

6

Data Originators Options

Area Velocity Flow Meters Different vendors/ different applications More detailed data (flow, level, velocity) More expensive

Level Transducers Standard (ultrasonics, sonar, pressure) Data: level (calculations needed) Inexpensive

TRADEOFF

CSS SCADA Points: 17RT-DSSPoints: 110

SCADA System: Rockwell – RSViewSCADA Monitored locations: 17 (mostly lift stations)Additional Monitoring: Based on Objectives

CSO outfalls: 36 sites Interceptor: 27 sites Trunk lines: 42 sites Retention basins: 5 sites Cost: $3M

Dense Monitoring System

8

Design to Fit

Objectives: Easy deployment Battery operated Data every 5 minutes Low maintenance

Development: University of Notre Dame Purdue University

Results: Mixed 900Mhz/Cellular Deployed mid winter 2008 Deployment time 1 month

Immediate Objectives

Focus on CSOs & Interceptor

First priority – organize data and learn how the system behaves during wet and dry weather Un-learn what is “normal”

Second priority – revise maintenance schedules Initial stage - Increase number of inspections Add calibration checks Focus on CSO service area cleaning Second stage – Reduce cleaning frequency

Revise staff duties9

10

Deviations from Model

Weir Elevation Water Level

Trunk line

Throttle line

Overflow line

11

Deviations from Model

This is normal!

Small blockage forms CSO is

vactored

12

Deviations from Model

Weir Elevation

Average Dry Weather Flow

Increased O&M Benefits Use of vactor trucks 50

additional days annually = $133K

Clean 2000 additional catchbasins annually = $40K

Increase number of sewer inspections at non-routine locations by 175% = $29K

All this with Same Staff Total Dynamic

Maintenance Value

= $202,000 13

“It’s like hiring more personnel, but without the cost.”

Gary Gilot, Director of Public Works,City of South Bend, IN

Real Time Data

14

110 Monitoring Sites30,000 Data Points Per Day

Real Time Decision Support Systems

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Data

Information+ Organization+ Context+ Analysis

SCADA Integration

SCADA Integration

17

1818

Using GIS

Dry Weather Overflow Elimination

97% DWO reduction from 2008 to 2010 2008 = $797,500 fines 2009 = $275,000 in 2009 fines 2010 = $27,500

Operations Optimization

20

Optimization In South Bend, IN

Reduce CSO volume by balancing flows to WWTP

Increase inline storage opportunities

Increase storage ability in retention basins by up to 150%

Optimize CIP saving $120 Million

Annual Overflow VolumeExisting System (MG)

Annual Overflow Volume CSOnet System (MG)

Percentage Reduction (%)

918.2 702.8 23%

Summary

Advances in information processing lead to new ways of performing maintenance, operations, and design

Integration of real time data, model, and visualization tools provides new insight

Future systems will further enhance capabilities by providing forecasting of hydraulic conditions before they happen