national weather service water predictions for life decisions hydraulics group reggina cabrera...
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National Weather Service
Water PredictionsforLife Decisions
Hydraulics Group
Reggina CabreraOffice of Hydrologic Development
Hydrologic Science and Modeling BranchHydraulics Group Leader
Cecile AschwandenAlbert MomoSanja Perica
July 2006
National Weather Service
Water PredictionsforLife Decisions
Outline
Past, present, and future of Hydraulics
Incorporation of Coastal Models
Inundation Maps (?)
Evaluation of Hydraulic Models
Dambreak
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Water PredictionsforLife Decisions
Past
Status of Hydraulics
Present
Future
OHD
Field Offices
?
National Weather Service
Water PredictionsforLife Decisions
Status of Hydraulics
Present
Field Offices
OHD
Where are we?
???
???
???
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Setting the start…
Field Office Feedback
OHD statusPlanPeopleSoftwareTraining
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Water PredictionsforLife Decisions
Software
FLDWAV
*AT series
DamAT
FldAT
SHRT
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Water PredictionsforLife Decisions
Recommendations of Models suitable for NWSRFS
Selection of Hydraulic Model(s)Technical RECOMMENDATIONS
FLDWAV DELFT HEC-RAS MIKE-11, 21
Operational Tests
Technical EvaluationSeveral data sets
Feedback
from
RFCs
MAPS
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Water PredictionsforLife Decisions
Hydrologic Model
Hydraulic Model
Tidal Model
Coastal Model
Precipitation Model
MappingMappingandand
Server (sServer (s))
Models
WQ
OHD Joint Projects
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Water PredictionsforLife Decisions
Difficulties
Hydrologic setting and calibrationhydraulic setting and calibrationcross-section informationwater levels data (gages, tide, etc.)
flow data (all conditions)man-made structures
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Water PredictionsforLife Decisions
Link to Coastal Models
NOS
SLOSH
ADCIRC
NCEP
OTHERS
Coastal Models
Hydraulic Models
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Water PredictionsforLife Decisions
HIGH Visibility
Will we run them in the future?
1-D 2-D or 3-D needed?
What is the interaction between models?
Most of the time Flow Forecasts
What means to Hydraulics Group? Select a hydraulic option to satisfy this
future possibility ?
Several Models in use, we don’t control them.
Coastal/Estuarine Models Details
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Water PredictionsforLife Decisions
WS Profiles Forecast
Hydraulic Model
MAPS
GISFLDVIEW
WEB
Inundation Maps
Hydrologic Model
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Water PredictionsforLife Decisions
1 Number of map scenarios
1 48.4 -77.599 40.577 447.99
1 47.625 0 0 445.91
1 46.85 0 0 443.83
1 46.84 0 0 443.83
1 46.5 0 0 443.83
1 46.2467 0 0 442.9417
1 45.9933 0 0 442.0533
1 45.74 0 0 441.165
1 45.4867 0 0 440.2766
1 45.2333 0 0 439.3883
1 44.98 -77.5558 40.5798 438.5
0 44.4538 0 0 437.2308
0 43.9277 0 0 435.9615
0 43.4015 0 0 434.6923
0 42.8754 0 0 433.4231
0 42.3492 0 0 432.1538
Map River Mile Latitude Longitude Thalweg
1984 Name of flood forecast map
48.4 475.5223 1692.8296 -999
47.625 473.3482 1574.3484 -999
46.85 470.442 1392.6216 -999
46.84 470.3957 1388.8903 -999
46.5 469.0605 10884.0742 -999
46.2467 468.1956 9105.6992 -999
45.9933 467.4252 7542.4292 -999
45.74 466.7634 6171.0713 -999
45.4867 466.199 4956.2461 -999
45.2333 465.7229 3867.4519 -999
44.98 465.323 2877.6511 -999
44.4538 464.5272 938.4684 -999
43.9277 463.7095 916.4625 -999
43.4015 462.8641 893.1454 -999
42.8754 461.9841 868.4618 -999
42.3492 461.0663 842.4289 -999
River Mile WSEL Top width WSEL (town)
FLDVIEW Input FilesFLDVIEW Input Files..xy filexy file .fcs file.fcs file
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Water PredictionsforLife Decisions
Map library and
inundation maps
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Water PredictionsforLife Decisions
Internet Mapping Server
FLDIMS
ArcIMS
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Water PredictionsforLife Decisions
Suggested for verification of inundation
High water marks…. Surveys
Photographs
Satellite Images
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Water PredictionsforLife Decisions
Questions to answer
Should we map?
GIS system?
Static vs Dynamic Maps
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Water PredictionsforLife Decisions
Verify flood maps using photographySt. Johns River, Florida.
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Water PredictionsforLife Decisions
MODIS sequence of 2006 Winter Flooding on the Red River of the North
Utility of Inundation Sensing for Discharge Estimation
3/28/2006 C/M ratio:
1.015 Estimated
Discharge: 5,510 ft3/sec
Measured Discharge:
6,610 ft3/sec
4/3/2006 C/M ratio:
1.114 Estimated
Discharge: 25,285
ft3/secMeasured
Discharge: 28,700
ft3/sec
4/4/2006 C/M ratio:
1.146 Estimated
Discharge: 29,443
ft3/secMeasured
Discharge: 33,200
ft3/sec
4/7/2006 C/M ratio:
1.341 Estimated
Discharge: 69,989
ft3/secMeasured
Discharge: 59,500
ft3/sec
4/13/2006 C/M ratio:
1.329 Estimated
Discharge: 61,436
ft3/secMeasured
Discharge: 68,300
ft3/sec
4/26/2006 C/M ratio:
1.185 Estimated
Discharge: 32,478
ft3/secMeasured
Discharge: 28,400
ft3/sec
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Water PredictionsforLife Decisions
Team Evaluation of Hydraulic Models
Mission: Evaluate selected hydraulic models to determine their capabilities and limitations in the technical area. The models will be tested for different data sets, providing a range of hydraulic conditions and different degrees of complexity. They will be reviewed against criteria to determine technical suitability.
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Water PredictionsforLife Decisions
Evaluation of Hydraulic Models of Hydraulic Models
Provide a focused direction for the hydraulic software NWS could use in the future
June 1st, 2006 to June 1st, 2007
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Water PredictionsforLife Decisions
Ed Capone
Lori SchultzBrian Astifan
Mike Shultz
John Halquist
Thea Minsk
Don Laurine
Janet McCormick OHD
Sanja PericaReggina Cabrera
National Weather Service
Water PredictionsforLife Decisions
OHDFLDWAV
USACE HECHEC-RAS
DELFTSobek
DHIMIKE-11, 21
Technical Evaluation Criteria
Several data sets
Software to be tested
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Water PredictionsforLife Decisions
DELFT
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Water PredictionsforLife Decisions
HEC-RAS
GUI
Fortran Programs
Dambreak
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Water PredictionsforLife Decisions
HEC-RAS
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Water PredictionsforLife Decisions
Suite of Models from HECSuite of Models from HEC
HMS
RES-SIM RAS
Inundation Maps
FIADAMBREAK
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Water PredictionsforLife Decisions
Suite of Models from NWSSuite of Models from NWS
NWSRFSHYDRO
RES-SNGLRES-J
FLDWAV
Inundation Maps
Forecast Warnings
DAMBREAK
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Water PredictionsforLife Decisions
MIKE-11 and MIKE-21
NCRFC and Red River
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Water PredictionsforLife Decisions
Status of work:
Conference calls
LOTS of support
MANY ideas
Lead and organize their ideas to keep going….
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Water PredictionsforLife Decisions
DamAT : Needwood DamDamAT : Needwood Dam
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Water PredictionsforLife Decisions
Needwood Dam, June 29,2006
I heard the news (6 AM, MDT) about a dam in MD while I was in Boulder making a presentation at COMET
I called OHD, HYD group, asked for a DamAT run at 8:30 AM and requested the results by phone
It was 10:30 AM and I had no results. I called from the airport and found out:
The name of the dam was not the correct one
The location needed to be checked
The DRGs were not available (1 : 24000)
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Water PredictionsforLife Decisions
Needwood Dam, June 29,2006
At 11:30 am before boarding I was told results were about to be ready ( the same I requested at 8:30 am)
At 5:00 pm I arrived in Washington and went to visit the dam to take pictures and decided on using this case to test our ‘MOST” advertised DamAT.
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Water PredictionsforLife Decisions
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Water PredictionsforLife Decisions
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Water PredictionsforLife Decisions
Actions Taken
Requested run at OHD with new data
Visited the site daily until the warning expired
Coordinated with WFO at Sterling
Coordinated with MARFC
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Water PredictionsforLife Decisions
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Water PredictionsforLife Decisions
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Water PredictionsforLife Decisions
Lake Needwood: Lessons LearnedTIME to compute results was UNACCEPTABLE
RESULTS were Questionable
DOCUMENTATION was NOT READILY FOUND
Field offices have not been trained and do not trust dam data
What is the bottom line?FACT: We are not close to be ready for DAMBREAK.
SOLUTION: We need to set a strategy to approach DAMBREAK
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Water PredictionsforLife Decisions
Technical Evaluation Criteria
1. Functionality and Capabilities of the model
2. Easy of Use
2.1 Setting
2.2 Calibration
2.3 Operations
3. Implementation and Integration of the model
4. Training, documentation and Support
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Water PredictionsforLife Decisions
FutureField Offices
OHDHydraulic Model(s)
Main Plan
Dambreak
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Water PredictionsforLife Decisions
Future and Dambreak
NEED RFCs/WFO COOPERATION
Started reviewing assumptionsof current tool(s) before continue using them (i.e. DamAT)
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Water PredictionsforLife Decisions
First meeting on September 18-22
Training • DELFT• HEC-RAS• MIKE-11 and MIKE-21Setting of models using selected data sets
Two more meetings in FY-2007
CONTINUE the EVALUATION OF Hydraulic Models
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Water PredictionsforLife Decisions
Ensemble Streamflow Prediction
Linked to Hydraulic Models
Probabilities and
Inundation Maps
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Water PredictionsforLife Decisions
Mapping withouta hydraulic model?
SHRT
(Simple Hydraulic Routing Technique)
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Water PredictionsforLife Decisions
QUESTIONS?
THANK YOU!THANK YOU!
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Water PredictionsforLife Decisions
You want to compare HEC-RAS
And
FLDWAV
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Water PredictionsforLife Decisions
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Water PredictionsforLife Decisions
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Water PredictionsforLife Decisions
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Water PredictionsforLife Decisions
InputInput
FLDATHEC-RAS
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Water PredictionsforLife Decisions
OutputOutput
Graphical :Graphical :High water profiles along channelStage and discharge hydrographs at all or selected locations“Poor man’s” animation3-D Plots Plots of input hydraulic parameters
Tabular :Tabular :Tables of hydraulic information at each computational time step
Database :Database :Data may be written to HEC-DSS or FLDDB database
Flood Mapping :Flood Mapping :HEC-GEO-RAS or FLDVIEW
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Output: 3-DOutput: 3-DHEC-RAS
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Output: Cross SectionsOutput: Cross Sections
HEC-RASFLDAT
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Output: Channel ProfilesOutput: Channel Profiles
HEC-RASFLDAT
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Water PredictionsforLife Decisions
Applicability to DAMCATApplicability to DAMCATWhy not use HEC-RAS instead of DAMCAT?Why not use HEC-RAS instead of DAMCAT?
DAMCAT uses a simplified DAMBRK model (SMPDBK
No equivalent exists in the HEC-RAS family, so a full blown UNET model must be built and run.
This introduces all of the complexities of an unsteady model, the avoidance of which is why SMPDBK was developed.
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Water PredictionsforLife Decisions
IN SUMMARYIN SUMMARY
- The HEC-RAS steady flow component is simpler to use than FLDWAV and is well suited to hydraulic structure design.
- The HEC-RAS steady flow component is not applicable to unsteady flow computations such as NWS river and flood forecasting.
- The HEC-RAS unsteady flow component (UNET) has most of the capabilities of FLDWAV and all of the complexities inherent to unsteady flow modeling.
- HEC-RAS does not possess a simplified dam failure analysis procedure.
- HEC-RAS is not an NWSRFS operation.
- HEC-RAS is a windows-only application.
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Water PredictionsforLife Decisions
Types of flow in open channelsTypes of flow in open channels
DEPTH and VELOCITY at a given location
Steady Flow: No variation with time
Unsteady Flow: Varies with time
DEPTH and VELOCITY along the channel
Uniform Flow: Constant
Varied Flow: Varies
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Gradually and Rapidly VariedGradually and Rapidly Varied
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Classification of FlowsClassification of Flows
Froude Number:
Fr = V/√gD
Fr < 1 Flow is Sub-critical
Fr = 1 Flow is Critical
Fr > 1 Flow is Super-critical
Disturbance at the downstream end of a Channel …. Popagation of the wave
Sub-critical Flow : wave propagates upstream
Super-critical Flow : wave can’t propagate upstream.
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Water PredictionsforLife Decisions
Manning’s EquationManning’s Equation
Q= [1.486 /n ][A x R2/3 x S1/2]
Q= K x S1/2
K is conveyance and affects the answer of the model.
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Water PredictionsforLife Decisions
Why HEC-RAS ?Why HEC-RAS ?
Documentation
Troubleshooting
Training
Stable
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Water PredictionsforLife Decisions
LIMITATIONS for HEC-RASLIMITATIONS for HEC-RAS
Assumptions
Uses 1-D energy Equation
Eqs. Solved for gradually varied flow
Dominant forces are in the x direction
Channel slopes should be less than 1:10
Steady versus unsteady
One dimensional flow vs 2 or 3-D
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Water PredictionsforLife Decisions
HEC-RAS and NWS HEC-RAS and NWS OperationsOperations
Steady vs Unsteady HEC-RAS
Operational Data Ingestion
Execution Time
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Water PredictionsforLife Decisions
Setting of the ModelSetting of the Model
Developing the River System Schematic
•
Cross Section Data
•
Stream Junctions
•
Bridges and Culverts
•
Multiple Bridge and/or Culvert Openings
•
Inline Structures (Weirs and Gated Spillways)
•
Lateral Structures (Weirs, Gated Spillways, Culverts, and Rating Curves)
•
Storage Areas
•
Storage Area Connections
•
Pump Stations
•
Cross Section Interpolation
•
River Ice
•
Viewing and Editing Data Through Tables
•
Importing Geometric Data
•
Geometric Data Tools
•
Attaching and Viewing Pictures
•
Saving the Geometric Data
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Water PredictionsforLife Decisions
Show the GUI and CapabilitiesShow the GUI and Capabilities
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Water PredictionsforLife Decisions
Graphics and TablesGraphics and Tables
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Water PredictionsforLife Decisions
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Water PredictionsforLife Decisions
Examples for types of flowExamples for types of flow
Dambreak
Flood wave
Hydropower releases
Chanel with constant discharge
Flash flooding
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Water PredictionsforLife Decisions
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Water PredictionsforLife Decisions
Gradually and Rapidly VariedGradually and Rapidly Varied
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Water PredictionsforLife Decisions
Classification of FlowsClassification of Flows
Froude Number:
Fr = V/√gD
Fr < 1 Flow is Sub-critical
Fr = 1 Flow is Critical
Fr > 1 Flow is Super-critical
National Weather Service
Water PredictionsforLife Decisions
Manning’s EquationManning’s Equation
Q= [1.486 /n ][A x R2/3 x S1/2]
Q= K x S1/2
K is conveyance and affects the answer of the model.
National Weather Service
Water PredictionsforLife Decisions
Why HEC-RAS ?Why HEC-RAS ?
Documentation ?
Troubleshooting ?
Training ?
Stable ?
Dimensions ?
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Water PredictionsforLife Decisions
LIMITATIONS for HEC-RASLIMITATIONS for HEC-RAS
Assumptions
Uses 1-D energy Equation
Eqs. Solved for gradually varied flow
Dominant forces are in the x direction
Channel slopes should be less than 1:10
Steady versus unsteady
One dimensional flow vs 2 or 3-D
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Water PredictionsforLife Decisions
HEC-RAS and NWS HEC-RAS and NWS OperationsOperations
Steady vs Unsteady HEC-RAS
Operational Data Ingestion
Execution Time
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Water PredictionsforLife Decisions
Setting of the ModelSetting of the Model
Developing the River System Schematic
•
Cross Section Data
•
Stream Junctions
•
Bridges and Culverts
•
Multiple Bridge and/or Culvert Openings
•
Inline Structures (Weirs and Gated Spillways)
•
Lateral Structures (Weirs, Gated Spillways, Culverts, and Rating Curves)
•
Storage Areas
•
Storage Area Connections
•
Pump Stations
•
Cross Section Interpolation
•
River Ice
•
Viewing and Editing Data Through Tables
•
Importing Geometric Data
•
Geometric Data Tools
•
Attaching and Viewing Pictures
•
Saving the Geometric Data
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Water PredictionsforLife Decisions
Show the GUI and CapabilitiesShow the GUI and Capabilities
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Water PredictionsforLife Decisions
Graphics and TablesGraphics and Tables
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Water PredictionsforLife Decisions
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Water PredictionsforLife Decisions
Examples for types of flowExamples for types of flow
Dambreak
Flood wave
Hydropower releases
Chanel with constant discharge
Flash flooding
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Water PredictionsforLife Decisions
HEC-RAS and modeling flowHEC-RAS and modeling flowSub-critical
Super-critical
Mixed
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