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The Corps Water Management System (CWMS)

An overview

Adam SchneiderDavid Ford Consulting Engineers, Inc.

WAFSCM - October 30, 2014

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What is CWMS?

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A USACE-developed decision support systemcapable of real-time:• Data acquisition• Data visualization• Hydrological forecasting

CAVI = Control and Visualization Interface

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Where has CWMS been deployed?

• Big push in 2009 as a result of ARRA.• Current push with funding coming from the

USACE Modeling, Mapping, and Consequences (MMC) center.

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2009 CWMS deployment sites

Is CWMS available for non-USACE users?

• No, but a similar package is available: • Hydrologic Engineering Center Real-Time

Simulation Program (HEC-RTS)

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What is CWMS?

3 overarching capabilities:• Data acquisition• Data visualization• Hydrological forecasting

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Data acquisition

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CWMSCAVI

CWMS server

Database

Decoding

Transformation & Validation

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CAVI data acquisition module

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Time series icons

Data quality color bars

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Data status summary report

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Can modify list to include only critical data

What is CWMS?

3 overarching capabilities:• Data acquisition• Data visualization• Hydrological forecasting

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CAVI data visualization module

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Real-time plots can be generated for each icon

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Can also view gridded data

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NEXRAD rainfall data

What is CWMS?

3 overarching capabilities:• Data acquisition• Data visualization• Hydrological forecasting

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The big idea…

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Want to predict stage/flow here

ReservoirFirst need runoff hydrographs!

Simulation window

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Lookback period

Forecastperiod

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Forecasting workflow

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CWMS utilizes familiar and widely used modeling software

Step 1: Meteorological forecast preprocessor (MFP)

• Need to start by specifying meteorology• Lookback period: NEXRAD data• Forecast period: User specified or NWS

quantitative precipitation forecasts (QPFs)

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Step 2: Hydrologic modeling system (HEC-HMS)

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• Given precipitation, compute runoff

Precipitation inputs from MFP

Flows computed by HEC-HMS

Step 3: Reservoir simulation (HEC-ResSim)• Given runoff (incl. reservoir inflows), compute

reservoir releases

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Reservoir inflows computed by HEC-HMS

Reservoir releases computed by HEC-ResSim

Simulated reservoir pool elevations

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Step 4: Channel simulation (HEC-RAS)

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• Given reservoir releases, compute downstream:• Stage/flow.• Inundation.

Reservoir releases from HEC-ResSim

Intervening local flows from HEC-HMS

Stages and flows at all cross sections from HEC-ResSim

Step 4: Channel simulation (HEC-RAS)

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Output available for all cross sections

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Step 4: Channel simulation (HEC-RAS)

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Sample inundation map

Step 5: Consequences (HEC-FIA)

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• Given stages/inundation, compute impacts and required response

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Viewing forecast results

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In Summary, CWMS:

• Is easily adaptable• Can do as little or as much as you want it to do• Allows users to access lots of information and

data from a single interface• Improves operational decision making

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Contributors

• Ben Zoeller, AMEC Nashville• USACE Norfolk District

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Real-time forecasting

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Step 5: Consequences (HEC-FIA)

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Model alternatives

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Forecast alternatives

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Forecast runs

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