Flood Forecast Mapping in AHPS
October 28, 2003
10/28/2003 MARFC/NWS/NOAA
Outline• Definition• Requirements• Processing Tasks
– One-time– Routine
• Test Area• Presentation Methods• What next?
10/28/2003 MARFC/NWS/NOAA
Definition
• Provide areal extent of flooding referenced against well-understood markings (streets, structures, landmarks) for water elevation forecasts
• At multiple locations along river reach
10/28/2003 MARFC/NWS/NOAA
Requirements
• Water Surface Profile– FLDWAV, SHRT, other
• DEM Data
• Processing Tools
• Presentation Methods
10/28/2003 MARFC/NWS/NOAA
Requirements
• Water surface profile– NWS FLDWAV
• Data collection• Calibration• Verification• Routine generation
– deterministic– probabilistic
10/28/2003 MARFC/NWS/NOAA
Requirements
• Digital Elevation Data– High-resolution most effective
• Reference Overlays– Orthophoto (geo-referenced images)– USGS Quad Sheets– TIGER Data– Utility Plans
10/28/2003 MARFC/NWS/NOAA
Requirements
• Processing Tools– Process static data
• Create ground grid
– Process dynamic data• Create water surface grid
• FLDVIEW– Arcview based
10/28/2003 MARFC/NWS/NOAA
Test Area
10/28/2003 MARFC/NWS/NOAA
Test Area
10/28/2003 MARFC/NWS/NOAA
Test Area
10/28/2003 MARFC/NWS/NOAA
Test Area
10/28/2003 MARFC/NWS/NOAA
Processing – Ground Grid
10/28/2003 MARFC/NWS/NOAA
Processing – Ground Grid
10/28/2003 MARFC/NWS/NOAA
Processing – Water Surface Grid
10/28/2003 MARFC/NWS/NOAA
Processing – Water Surface Grid
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Samples (Jan ‘96)
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Samples (Jan ‘96 Zoom)
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Highwater Comparison (‘84)
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Samples (4 layer zoom)
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Presentation
• Water surface profile
• Water surface grid– Shapefile
• Static web images
• Web-based image generation
• Policy issues for new product category
10/28/2003 MARFC/NWS/NOAA
Web-based Image Generation
• Internet map service
• User interaction– User selectable layers– Zoom
• Prototype site:– http://nwshqfld.nws.noaa.gov– Autodesk plug-in required
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Prototype Map Service
10/28/2003 MARFC/NWS/NOAA
Prototype Map Service
10/28/2003 MARFC/NWS/NOAA
Prototype Map Service
10/28/2003 MARFC/NWS/NOAA
Prototype Map Service
10/28/2003 MARFC/NWS/NOAA
Prototype Map Service
10/28/2003 MARFC/NWS/NOAA
Prototype Map Service
10/28/2003 MARFC/NWS/NOAA
Prototype Map Service
10/28/2003 MARFC/NWS/NOAA
Prototype Map Service
10/28/2003 MARFC/NWS/NOAA
Status
• Single location– Lewistown on Juniata River
• Daily Background processing– After routine operations– Cron initiated– FLDWAV on Linux– FLDVIEW on HP WS
10/28/2003 MARFC/NWS/NOAA
Stats
• Space Requirements– On AWIPS, Lewistown - ~1 GB– On FLDIMS - ???
• FLDWAV performance - Linux– Deterministic, entire Susq. – few seconds– Probabilistic, 7 day PQPF – 35+ seconds– Probabilistic, 30 day - ~ 3 minutes
10/28/2003 MARFC/NWS/NOAA
Stats (cont’d)
• FLDVIEW performance – HP WS– Fully automated– 7+ minutes deterministic (one layer)– 35+ minutes, 5 layer probabilistic (5 layers)
• FLDVIEW performance – P3, 1 GHz, 512 MB– ~1’ 10” per layer
10/28/2003 MARFC/NWS/NOAA
Stats (cont’d)
• Automated process– Within Linux scripts
• OFS, PQPF, ESPADP, FLDVIEW, FTP
– MARFC-developed queuing system – MARFC-developed auto-X-Display– Expect-based FTP transfer of modified
shapefiles
10/28/2003 MARFC/NWS/NOAA
What next?• Sequencing
– From peak value to 6 hour values– Animation?
• New location– Coding and structure changes– Other Susq. FLDWAV calibrated reach
• OHD prepared– Resources and methodology for entirely new
location• Data, software, code, training, documentation• In-house vs. AHPS funded
10/28/2003 MARFC/NWS/NOAA
What next? (cont’d)• Simplified Hydraulic Routing Technique
(SHRT)– Mapping for locations without backwater, without
junctions• NWS Policy
– Products• Water surface profiles, shapefiles, images, internet
mapping services• Official communications methods
• PC-based FLDVIEW execution– Currently coded for either HP-UX or PC
10/28/2003 MARFC/NWS/NOAA
What next? (cont’d)• Internet map service selection
• User feedback– Design– Performance– User-friendliness
The End