Evolution of Gis Impact on Sustainable Hydraulic Modeling

8/9/2019 Evolution of Gis Impact on Sustainable Hydraulic Modeling

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www.idmodeling.com 1

The Evolution of GIS and its Impact on

Sustainable Hydraulic Modeling

Dave Harrington // IDModeling, Inc.

September 15, 2009

Bentley eSeminarwww.idmodeling.com

[email protected]


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Acknowledgments

Industry Colleagues

Cities & Utilities

Fellow Consultants

IDModeling Colleagues

Mr. Paul Hauffen Mr. Brian Powell, P.E.

Mr. Rajan Ray

Mr. Patrick Moore, P.E.


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Agenda

Overview of the Evolution of GIS

Evolution of Hydraulic Modeling

Impact of the Evolution of GIS

on Sustainable (1:1) Models Process and Considerations for

Building Sustainable Models


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Overview of the Evolution of GIS


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Evolution of Hydraulic Modeling

Identify cri tical valves

IDSE Modeling

Flushing planning

Operator training

Finding closed valves

Surge Analysis

Fire sprinkler systems

Raw water pumping

Leakage analysis

Irrigation systemsPipe Replacement Plan

Pump Scheduling

QA/QC of GIS/CAD data

Size pipes

Master planningNon-revenue water analysis

Subdivision design

System extension

System rehab

Fire flow analysis

Troubleshooting

Pump selection

Tank sizing/location

Sensor Location

Management

Online Results Viewer

PRV setting identification

Pressure zone setup

Capital Cost Analysis

Operational changes

Chlorine Analysis

Pump energy usage

Water quality tracking

Water age analysis

Water quality impact of storage

Contamination analysis

Hydraulic ModelingWhats my pressure here?


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Benefits of Sustainable Models

Easier to build and update accurately

Stay consistent with data in GIS

Do not require skeletonization

Enables more detailed, flexible demand allocation Calibration is streamlined

Opens the door for advanced applications such as

IDSE, UDF, water quality, valve criticality, energyusage, operational modeling, etc.


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Planning for a Sustainable Model

A sustainable 1:1 model is now a realistic option

More widespread use of geometric networks and better-defined networkrules are enabling easier model creation and updating

Recommended business process steps

Review GIS structure, attributes, connectivity, rules

Verify that IDs are fully populated, unique, and stable

Identify your modeling requirements

List all the steps in the proposed model creation / update process

Identify ways to track future updates (additions, deletions, modifications)

List any changes desired in the source GIS

Discuss the proposed changes with GIS group in detail

Get consensus on the changes up front and document everything

Test the process


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Steps for Building a

Sustainable Model 2

Model Components

Pump curves Demands

Controls C-factors

Patterns Scenarios

Questions Etc.

Changes/EditsNew features Pipe length

Aband. features Pipe diameter

Pipe splits Elevations


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Important Points for Sustainability - 1

How elements are connected together

(i.e., their network topology) is crucial for models Many topological issues are difficult to find by eye

Topological accuracy in the source data is critical

for an accurate model

Geometric Networks can resolve many typical issues observed Unfortunately problems, can still arise!!

Inspect the GIS, identify and correct any topology issues

before the model is constructed use the software tools

to help you


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Watch out for identity theft

Modeling requires a unique ID for each element

The GIS attribute OBJECTID may not be unique

throughout the entire GIS, and is not necessarily a

stable field not a good choice for your model ID Consider creating a stable attribute field called

MODEL_ID. Create rules in your geodatabase to

ensure this attribute is unique throughout the

entire geodb, fully populated, and stable


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Facilities in GIS may not include much detail

Why? You typically dont need that level of detail!

Some facilities require special work to prepare

them for export from GIS to model

Some detail may have to be removed Multiple connected reservoirs

Some detail may have to be added

Point-type PRV vaults need to represent valves in parallel

Point-type booster stations need to represent pumps in parallel

versus


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Process GIS Data to

Prepare for Modeling

Translation from GIS to model

Make the base GIS 1:1 with model topology

(typically not achievable)

OR

Use a translation utility

Home-made - custom scripting, or

Off-the-shelf


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Visual Workflow of Processing

GIS Data to Prepare for Modeling


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Track what has changed

What has been added?

What has been removed/abandoned?

Which attributes have been modified?

Track when it changed To enable future incremental model updates


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Updates involve more than just preserving or

updating features and geometry

Model demands

Base and customized demands

Extended attributes

Diurnal patterns, pump curves, controls, etc.

Scenarios

Data sets, facility sets

L f B ild f


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Lessons for Builders of

Sustainable Models

The best process is one that is customized for

your data and your business needs

Theres no substitute for project momentum

Rules, consistency, and documentation are just

as vital to a sustainable hydraulic model as theyare to a sustainable GIS


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Summary on Sustainable Modeling

The evolution of GIS is helping the development

of sustainable models

Review the topology of your GIS in detail and iterate to

identify and resolve connectivity issues

Review all proposed GIS changes in detail with GIS group

and get their input and buy-off

There are software tools available to help build sustainable

models, but you still need good data, and a solid,

well-documented process

Successfully building a sustainable model is a balancingact, keeping in mind the details and the overall process


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Additional Resources

Book

Best Practices for Sustainable GIS andHydraulic Model Integration To be published in 2010, ESRI Press

IDModeling, Black & Veatch, and ESRI

White Paper

A Guide for Water Utilities of All Sizes Presenting Best Practices for Sustainable GIS and Hydraulic Model Integration

To be published in early 2010, ESRI Press

IDModeling and Black & Veatch

AWWA M32 Manual New Edition

Includes updates specific to GIS+Modeling

Discussion forums

Blogs and forums on www.hydraulicmodel.com

Bentleys Water and Wastewater Network Analysis and Design Forum


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The Evolution of GIS and its Impact on

Sustainable Hydraulic Modeling

Dave Harrington // IDModeling, Inc.

September 15, 2009

Bentley eSeminarwww.idmodeling.com

[email protected]

Documents

Evolution of Gis Impact on Sustainable Hydraulic Modeling