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Combining

Geographic Information SystemsWith

Hydraulic Models

October 20, 2010

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GOALS FOR TODAY

GIS with Hydraulic Modeling

Project Related Applications

Earn CEUs

Not Get Bored

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Overview

Geographic information systems (GIS)

Hydraulic models

Process

Project examples

Water distribution system - city of Chesapeake

Wastewater model - Fort Monroe

Questions

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Geographic Information Systems

Its a Science (Geographic/Geospacial Information Science)

Software Application

- Autodesk, Bentley, ERDAS Imagine, ESRI, IDRISI, Intergraph,

MapInfo, RegioGraph, Small World

- GRASS, SAGA, Quantum, MapWindow, ILWIS, JUMP

Geographically Referenced Data (for making decisions)

- Garman, TomTom, Magellan

- Urban Planning

- Emergency Management- Disease Control

- Infrastructure Management

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Hydraulic Models

Water - Transmission & Distribution

Wastewater - Collection & Conveyance

Surface Water Natural & Constructed Open Channel Flow

Uses

Hydraulic Analysis, Sediment Transport, Water Quality, Fate

&Transport, System Expansion/Improvements

Software Application

HEC-RAS, SWMM, InfoSWMM, InfoWater, InfoWorks, WaterCAD,SewerCAD, StormCAD, DHI MIKE Urban

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Model Selection

Why MIKE Urban?Hampton Roads Regional Consent Order (September 26, 2007)

Includes 13 localities and Hampton Roads Sanitation District

Requires Hydraulic Performance Assessment

One Regional Model Concept

Data Connectivity

System Familiarity

All in one approach

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Model Engines

EPA Storm Water Management Model (SWMM)

Dynamic rainfall-runoff simulation

Utilizes sub catchment areas

Tracks the quantity and quality of runoff

Comprised of multiple time steps.

EPANET Water Distribution Model

EPA's Water Supply and Water Resources Division

Models Water Distribution Piping Systems

Extended-period simulation

Hydraulics and water quality behavior within pressurized pipe

networks.

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Common Pit Falls

Junk In = Junk Out

The data set must accurately represent the system

- No Errors = Correct Results

- Accuracy = Correct Results

I can input the data therefore I know how to model the system

Understand whats going on behind the curtain

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Population of 220,000+ with over 60,000 meter accounts

Avg consumption = 18 MGD

Water demand provided from four different sources

NWRTP and LGTP produce 11.5 MGD

City of Portsmouth provides 3.0 MGD

City of Norfolk provides 3.5 MGD

Chesapeake Water Model

Background Information

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Chesapeake Water Model

Data & AnalysisIdentify Data Required for Model

Determine Available Data (GIS, Record Dwgs, Operational Info.)

Collect and Review Data for Model

Import GIS data to create data model

Add Demand Data and Geocode

Add Operational Data to physical model elements

Calibration

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Chesapeake Water Model

Data Collection & Review

GIS Data

Pipes Valves

Nodes

Tanks

Pump Stations

Master Meters

Spot Elevations

Master Meter Data

Record Drawings

SCADA Tank Level/Pressure

Plant Discharge/Pressure

Snapshots

Isolation Valves

Valve Intersection Maps

Pump Curves

Chesapeake WaterCAD Model

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Chesapeake Water Model

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Chesapeake Water Model

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Create Model from GIS Data Import/Export Tools

Interpolation and Assignment Tools to assign elevations

Network Connectivity Tools

Manual correction of disconnected pipes and interpolate missing

data

7,000 pipes and nodes, 13 tanks,17 Pumps, 2 WTP, 10 Master

Meters, and 70 valves.

Chesapeake Water Model

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Demand Data

Consumption records of all metered accounts

Geocoded the meter accounts and consumption

Imported demand points with coordinates from GIS

Assign demands to nearest node in the system

Manually placed demand nodes

Apply peaking factors to achieve mass balance.

Chesapeake Water Model

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Chesapeake Water Model

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Fort Monroe

Built between 1819 and 1834 (History of Fortification 1608)

Original mission - Protect the entrance to Hampton Roads

Used extensively during the Civil War through WWII

1973 became home to the Training and Doctrine Command

BRAC 2005 Recommended Closure (September 15, 2011)

Fort Monroe Authority Established as a Political Subdivision of the State

History

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Fort Monroe Wastewater Model

2.1 million gallons per day (MGD) design capacity

1.6 MGD actual capacity 11 major sewersheds

14 pump stations

70,000 linear feet of gravity sewer

19,000 linear feet of force main

244 sewer manholes

Background Information

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Operational Data ModelManual Input

Storage tank / Wet Well characteristics

Initial water level, volume, upper and lower limits from SCADAand Institutional data

Pump curves in Mike Urban and assign to appropriate pumps

within the system.

Operations Staff Input

Valve isolation locations

Standard operating procedures

Service areas / Sewersheds

Fort Monroe Wastewater Model

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Fort Monroe Wastewater Model

Flow Data

Based on the Regional Consent Order

Previous Study performed in 2002

Flow Meters Installed

Water Demand Data

HRSD Master Meter

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Fort Monroe Wastewater Model

Model Calibration Calibration Spreadsheet

Apply global adjustments within each service area

Look for errors (Hard copy QC/QA)

Confirm assumptions/corrections

Operations & Hard Data

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Overall Model Capabilities

Fire Flow scenarios

System Adjustments

Identify problem areas

Capacity Improvements

Development - BEQ, Regimental Complexes

Areas of substandard service

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Questions?

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Thank You!

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