CWMSOverview ACF Basin Real Time Inudation

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					Corps Water Management System




             USACE Hydrologic Engineering Center
                         Davis, CA

                        Hydrologic Engineering Center
Objectives

• Overview and Concept of CWMS
• Scope for ACF Basin CWMS
  Deployment
• ACT/ACF Emergency Action Plan
    Water Control Mission

•   Real-Time Decision
    Support for Water
    Management

•   700+ Multipurpose
    Reservoirs and
    Flow Control
    Structures,
    Thousands of Miles
    of Levees

•   Expanded
    Corporate Web-
    Based Information
  CWMS
An integrated
system of
hardware,
software, and
communication
resources
supporting Corps’
real-time water
control mission
                             History                    2009
Manual data            Harris systems gone, PCs,                CWMS deployed
collection, storage,   workstations take over mainframe         Corps-wide
analysis,              functions, some real-time modeling,      development of
interpretation,        and data handling, corporate             forecast models for
modeling historic      WCDS modernization plan evolves          all major
data begins            and work on modernized system            watersheds.
                       begins



                1975            1985             1995        2000


     Automated data systems, satellite
      broadcast of data, modeling tools      CWMS integrated suite of
      develop, deployment of Harris          hydrologic, operations and impact
     computer systems.                       analysis models available,
  CWMS Software Integrates the Processing
  from Data to Water Management Decisions
                                         SERVERS
                                                              Weather
                                      Data Processing         Forecast
                                       Data Storage
Observed                                Modeling
Data
                                                        Public and
               Field Office                             Cooperators


                              Instructions



                                                        Water Control
                                                        Management
                                                        Decisions
CWMS - Major Components
• Database
  – Stores hydromet data in Oracle DBMS
  – Manages retrieval and display of same

• Data Acquisition (Observations)
  – Collects real-time data from data streams
  – Decodes, validates, and transforms the raw data

• Modeling (Forecasts)
  – Manages model configurations for watersheds
  – Runs models for operational forecasts
User Control and Visualization
Simulation Modeling
CWMS Components

       Data                     Data Base
     Collection




                   Modeling
       Data                    Information
   Visualization              dissemination
Data Acquisition
   Collect:
          Static data: physical data for model
           development
          Real-time data: observed stream
           flow, precipitation, temperature,
           water quality, gate settings, reservoir
           levels, etc.
   Decode
   Validate
   Transform
Data Visualization
                                      Model Results




Time of Forecast   Time of Forecast
                           Tabular Information
             Stage
 Impact Area   (ft)                        Impact                                      Action                                                 Time
                                                                                                                        Initial Forecast          Modified Releases
Cottage Area       556.0   Flood Warning Stage                       Initiate reconnaissance and alert appropriate personnel.22Mar2002 0600         22Mar2002 0600
                   558.0   Flood Stage                               Full alert, warn of potential evacuation.               22Mar2002 0700         22Mar2002 0700
                   560.0                                             has begun.
                           Damage to infrastructure, landscape, etc. Close life lines & roads to everyone but local traffic. 22Mar2002 0900         22Mar2002 0900
                   561.0   Egress begins to be a problem.            Evacuate residences & perform surveillance.             22Mar2002 1000         22Mar2002 1000

                                                                                                                       Max Flood Stage -          Max Flood Stage -
                                                                                                                    25Mar2002, 07:00 562.63 ft 25Mar2002, 07:00 562.63 ft

Lock Haven         535.2   Zero stage reading                                                                             19Mar2002 1000             19Mar2002 1300
                   540.1   Flap gates of interior drains under water Check drains to ensure operation                     21Mar2002 2300             21Mar2002 2300
                   543.2   Elevation of Grant Street Dam                                                                  22Mar2002 0100             22Mar2002 0100
                   545.0                                             Remove
                           Handrails at Summer Beach nearing inundation handrails & close Grant Street Dam platform22Mar2002 0200                    22Mar2002 0200
                   549.0   Grant Street Dam platform elevation                                                            22Mar2002 0400             22Mar2002 0400
                   553.0   Flood Warning Stage                       Begin levee patrol                                   22Mar2002 0600             22Mar2002 0500
                   556.2   Flood Stage                               River overtops bank                                  22Mar2002 0900             22Mar2002 0700
                   556.3   Bath house floor elevation                Close bath house                                     22Mar2002 0900             22Mar2002 0700
                   557.2                                             Prepare to close Closure Structure No. 3             22Mar2002 1000             22Mar2002 0700
                   559.1                                             Close Closure Structure No. 3                        22Mar2002 0800             22Mar2002 0800
                   559.2                                                                                                  22Mar2002 0800             22Mar2002 0800
                                                                     Prepare to close Closure Structure No. 2, notify Penn DOT and County communications
                   561.0                                             Close Closure Structure No. 2                        22Mar2002 1000             22Mar2002 1000
                                                                                                                                                    Max Flood Stage
                                                                                                                        Max Flood Stage -       - 25Mar2002, 07:00 562.07
                                                                                                                     25Mar2002, 07:00 562.07 ft            ft

Sayers Lake Area   586.0   Streambed                                 None                                                 19Mar2002 1300            19Mar2002 1300
                   590.0   Gate Sill                                 None                                                 19Mar2002 1300            19Mar2002 1300
                   610.0   Late Winter Conservation Pool             None                                                 19Mar2002 1300            19Mar2002 1300
                   625.0   Mid winter Conservation Pool              None                                                 22Mar2002 1000            22Mar2002 1000
                   630.0   Summer Recreation Pool                    None                                                 22Mar2002 1600            22Mar2002 1600
Data Dissemination
Real-Time Simulation Modeling
for Decision Support

          I see a hurricane
           in your future.
            Watershed Modeling

Modeling     Data                              Data Base
           Collection
                    (Hydrology)    (Storage)

                      HMS           ResSim

                        FIA           RAS
                          Modeling
                      (Damages) (Hydraulics)
         Data                             Information
     Visualization                       dissemination
The Modeling Process
          1) Check status & currency of real-
             time data
          2) Select a forecast time
          3) Adjust model parameters
          4) Perform model computations
          5) View results
          6) Modify model parameters as
             necessary
          7) Re-compute simulation
Precipitation Analysis
   • Precipitation processed on a grid
       basis.
   •   Observed data from NEXRAD or
       interpolated from gages.
   •   Future Precipitation Scenarios:
       – NWS Quantitative Precipitation
         Forecasts (QPF)
       – Multiples of the QPF
       – Manual-entry or standard scenarios
         (What if?)
           • Timing
           • Location (watershed “zones”)
   HEC-ResSim
    Reservoir Simulation System
Simulates reservoir regulation using inflow
  hydrographs & project characteristics
                                                                                                                                                                                          River Hydraulics
                                                                                                                                                                                          HEC-RAS
                                                                                                                                                                              • Analyzes river hydraulics to compute
                                                                                                                                                                                              water depth, velocity, & inundation
                                                                                                                                                                                              boundaries
                                                                                                                                                                              •               Computes water surface profiles and
                                    Bald Eagle Cr. for the WCDS Project                     Plan:   1) 10inforec             2) 2inforec
                                                                                                                                                                                              stage hydrographs from HEC-ResSim
                                                                                                                                                                                              hydrographs
                                                                                                                                                                           Legend

                                                                                                                                                                  WS Peak Flows - 10inf orec
                 620                                                                                                                                              WS Peak Flows - 2inf orec




                                                                                                                                                                              •               Steady-flow or unsteady-flow analysis.
                                                                                                                                                                           Ground




                                                                                                                                                                              •               Channel friction adjusted through
                 600




                 580
                                                                                                                                                                                              CWMS interface
                                                                                                                                                                              •               Used in conjunction with Arc,
Elevation (ft)




                 560



                                                                                                                                                                                              inundation boundaries and depth
                 540
                                                                                                                                                                                              maps are computed then viewed with
                 520
                                                                                                                                                                                              CorpsView, an extension to Arc
                                                                                                          Beech Ck Sta
                                                                             Cottage Area
                       Lock Haven




                                              Fishing Ck




                                                                                                                                                      Blanchard
                                                                                                                                           Marsh Ck




                 500
                            0         20000                              40000                                       60000                            80000

                                                           Main C hannel Dis tance (f t)
River Profile Modeling
             Bald Eagle Cr. for the WCDS Project   Plan: Unsteady with Bridges and Dam
                                                                                              Legend

                                                                                         WS 19Feb1999 0200
                                                                                              Ground

                                                                                             Bank Sta

                                                                                               Levee
                                                                                  Ineff
                                                          Bald Eagle Cr. for the WCDS Project                          Plan: Unsteady with Bridges and Dam
                                                                                                             Loc Hav
                   680
                                                                                                                                                                      Legend

                                                                                                                                                                 WS 19Feb1999 0200
                                                                                                                                                                      Ground
                   660




                   640




                   620
Elevation (ft)




                   600




                   580




                   560




                   540




                   520
                          0                        20000                      40000                60000               80000       100000        120000      140000

                                                                                                  Main Channel Distance (ft)
                                                               Economic / Impact
                                                               Analysis (HEC-FIA)

                                                               • Computes agricultural and
                                                                   urban damages and project
                                                                   benefits by “impact area”
                                                               •   Computes damages and
             26
                                                                   benefits between different
                                                                   scenarios, and with and
                                                                   without project conditions
             25
River
Level


                                                               •
     24

                                                                   “Action tables” provide a list
STAGE (FT)




             23


             22
                                                                   and time of actions to take
             21
                                                                   during an event, based on
                  0   100    200   300     400     500   600
                                                                   forecasted stages
                            DAMAGES      ($1000)
    CWMS
    Model Linking
• HEC-HMS computes forecasted flows from
     – Observed precipitation from
       NEXRAD and rain gages
     – Future precipitation forecasts
       and scenarios
     – Observed flow
• ResSim simulates reservoir operations and
    downstream flows from HEC-HMS flows.
•   HEC-RAS computes stages and inundation
    areas from ResSim flows.
•   FIA computes damages and impacts from
    HEC-RAS stages or ResSim flows.
•   Inundation areas and depths are displayed
    in CorpsView, an extension to ARC.
 CWMS Summary
• Comprehensive, integrated
  system for real-time water
  control decision support
• Complete data retrieval /
  verification / database system
• Full range of hydrologic /
  hydraulic modeling software to
  evaluate operational decisions
  and compare the impact of
  various “what if?” scenarios
• Client / Server architecture,
  with full set of visualization
  tools to evaluate data and
  model results
ACF Basin CWMS Deployment
• The ACF basin is selected in the SAD
  region.
• Funded by the U.S. Army Corps of
  Engineers’ Hydrologic Engineering Center
  (HEC)
• Being conducted by WEST Consultants,
  Inc., HEC’s BPA contractor
• Timeline: October 2009 – September 2010
Major Tasks
• HEC-HMS rainfall-
    runoff simulation
•   For the entire
    watershed
•   Use information from
    existing hydrologic
    models as much as
    possible
•   Based on gridded
    precipitation
•   Extensive model
    calibration/validation
Major Tasks
•   HEC-ResSim reservoir simulation
•   Hourly time-step
•   Including all Corps’ and GPC projects
•   Convert from the daily model currently
    being developed by the SAM and HEC
•   Inflow to HEC-ResSim comes from HEC-
    HMS and/or NWS
•   Output from the NWS model will be saved
    as HEC-DSS files and automatically
    uploaded to the SAM CWMS database
Major Tasks
• HEC-RAS Unsteady Flow
  Simulation
• One-dimensional unsteady flow model
• The geometry is georeferenced
• Inflow to HEC-RAS comes from HEC-
  HMS/HEC-ResSim and/or NWS/USGS
• Extensive model calibration/validation
Major Tasks
• HEC-RAS Unsteady
    Flow Simulation
•   Three reaches
    – Chattahoochee River from
      Lake Lanier to Norcross
      (approximately 20 miles)
    – Chattahoochee River from
      West Point to Langdale
      Dam (approximately 7 to 9
      miles)
    – Apalachicola River from
      Jim Woodruff Dam to
      Apalachicola Bay
Major Tasks
• HEC-RAS Unsteady
    Flow Simulation
•   Inundation mapping
    is not part of this
    CWMS deployment
    effort.
•   It can be done using
    the CWMS model
    results since the HEC-
    RAS models are
    georeferenced.
    Major Tasks
• HEC-FIA Flood
    Impact Analysis
•   Compute flood
    damage and benefit
•   Two reaches
    – Chattahoochee River
      from Lake Lanier to
      Norcross
      (approximately 20
      miles)
    – Chattahoochee River
      from West Point to
      Langdale Dam
      (approximately 7 to 9
      miles)
    Major Tasks
• CWMS
    Integration
•   Link all model
    components
    together
•   Test the CWMS
    system for
    selected events
•   Stress test for
    real-time
    operational
    forecast
ACT/ACF Emergency Action Plan

• Dam failure analysis
• Inundation Mapping Support
• Stimulus Funded
Purpose
• Documents actions to be taken by project
    personnel should a distress indicator be
    identified
•   Emergency Notification Plan which identifies the
    notification procedures for rapid dissemination of
    emergency actions
    – Time available for corrective action is most critical
       • Instantaneous failure – few minutes to 2 days
       • Time of travel of flood wave from origin to areas
What’s required?– Dam Break Analysis

• Time available for corrective action is most
  critical
  – Instantaneous failure – few minutes to 2 days

• Time of travel of flood wave from origin to areas
  downstream

• Inundation maps which indicate the areas which
  would be flooded as a result of a hypothesized
  dam failure
Projects
• ACT           • ACF
  – Allatoona     – Buford
  – Carters       – West Point
Products
• HEC-GeoRAS and HEC-RAS models to simulate
  the flows from the tributary areas and from the
  dam in a breached and non-breached condition
  1.   Spillway design discharge, without dam failure
  2.   Spillway design discharge, with dam failure
  3.   Dam failure at normal high pool level
  4.   Discharge at normal high pool, without dam failure
Analysis
• The A/E will apply the models and route the resulting
  flows downstream to a point where there is less than a 2
  foot increase in stage between the dam failure and non
  failure cases

• No bridge or culvert data will be used in developing the
  HEC-RAS model. It is assumed that the effects of a dam
  or culvert would be minor in comparison to the
  magnitude of the flows resulting from dam failure.

• Summary tables of peak flows, stages, flood wave arrival
  time, and velocities by station
Data Collection

• To perform the dam failure analyses and
 inundation mapping
  – Available 10m DEMs from the USGS National
    Elevation Dataset
  – Current Water Control Manuals (WCM)
Questions?

				
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