NOAA’s National Weather Service Flood and Flash Flood Warning Program
NJ Flood Warning Systems Flood Warning Systems.pdf · Stage (water level) ... Provide redundancy...
Transcript of NJ Flood Warning Systems Flood Warning Systems.pdf · Stage (water level) ... Provide redundancy...
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U.S. Department of the InteriorU.S. Geological Survey
New Jersey Flood Warning Systems
United States Geological SurveyNew Jersey Water Science Center
Heidi L. Hoppe, Project ChiefPresented at:
NJ Water Monitoring Council Meeting
May 31, 2006
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Mission of the NJ Flood Warning Systems
Provide real-time hydrologic data to the National Weather Service to aid in the development of timely and accurate flood forecasts, which assist county and municipal agencies in planning and executing efficient flood-preparation and emergency evacuation procedures.
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Major Cooperators
National Weather ServiceU.S. Army Corps of EngineersSomerset CountyBergen CountyBurlington CountyEssex CountyUnion CountyNew Jersey Department of Transportation
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Flood Warning Projects in New Jersey
Passaic Flood Warning System (with NWS)Pascack Flood Warning SystemRahway Flood Warning SystemSomerset County Flood Information SystemNew Jersey Tide Telemetry System
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Flood Warning Projects in New Jersey
Comprised of 5 types of gagesStream gagesPrecipitation gagesTide gagesWeather stationsCrest-stage gages
Transmit Real-time
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Stream Gages
Types of Shelters
Stilling Well
Gun-Safe Style Shelter
Flood-Warning Tube Style
Shelter
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Stream Gages--continued
Stage (water level) is collected at stream gages via:
Float encodersBubbler systemsPressure transducers
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Precipitation Gages
Rainfall is collected at precipitation gages using tipping-bucket rain gages.
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Tide Gages
Tide level is collected using acoustic water-level sensors
Pioneered by the National Ocean Service for the National Water Level Observation ProgramMeasures water level every 2 seconds which are averaged into 6-minute readings
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Weather Stations
The following parameters are collected to National Weather Service standards
PrecipitationAir TemperatureWater TemperatureWind Speed and DirectionBarometric Pressure
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Crest-Stage Gages
Simple, non-mechanical devicesMeasures peak water levelProvide redundancy during primary sensor failure
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Locations of Flood Warning
Gages
HUNTERDON
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NJ Flood Warning Systems
6 stream gages25 stage gages21 precipitation gage8 crest-stage gages28 tide gages33 tidal crest-stage gages5 NWS standard weather stations10 computer base stations
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Real-Time Telemetry
The Flood Warning gages transmit real-time data to a network of computer base stations located throughout the State at critical decision-making centers via:
VHF radioTelephone interrogationGOES satellite
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VHF Radio Telemetry
ALERT protocol(Automatic Local Evaluation in Real Time)
Event-driven transmissionsEvery 0.03 ft change in stageEvery 0.01 to 0.04 inch of rain
Timed transmissions every 12 hoursTide gages transmit every 12 minutes
Data transmitted directly to computer base stations
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Telephone Interrogation
Timed interrogation by computer base stationReceives all data since last interrogation
Synthesized VoiceIncoming calls receive current dataOutgoing calls programmed when thresholds are exceeded
Stream reaches exceeds flood warning and flood stages
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GOES Telemetry
Geostationary Operational Environmental SatelliteOperated by NOAA (National Oceanic and Atmospheric Administration)
ReliableAutomatic switchover during primary failure
Timed transmissions every 1 or 4 hoursRandom transmissions when thresholds are exceeded
Stream reaches exceeds flood stageData transmitted to computer base stations and USGS archival database
Your computer
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Computer Base Station Network
Shared responsibility of the communications infrastructure and the specialized computer software
USGS Flood Warning GroupNational Weather ServiceNew Jersey State Office of Emergency Management
Operate DIADvisor softwareUtilizes a Microsoft Access database for archiving data
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Real-Time Flood Warning Data Available to Public
ALERT dataNational Weather Service Automated FloodWarning System
http://www.afws.net/
GOES dataU.S. Geological Survey New Jersey Water Science Center
http://nj.usgs.gov/National Weather Service HydrometeorologicalAutomated Data System
http://www.nws.noaa.gov/oh/hads/
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Flood Warning Data Available to Public
All data is quality assured and published in the New Jersey Annual Water-Data Report
Available in CD format by mailAvailable in PDF format
Under “Publications” on the New Jersey Water Science center homepage http://nj.usgs.gov/
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Future Plans for the NJ Flood Warning Systems
Improve real-time capabilitiesUpgrade gages to GOES satelittle with 1 hour transmissions
Improve data accessibilityUpgrade radio only gages to radio and satellite
Provide the basic infrastructure for additional sensors
Water-quality sensorsTraffic sensors
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Further Information
Heidi L. Hoppe, Project [email protected]
USGS New Jersey Water Science Center Home Pagehttp://nj.usgs.gov
Data RequestsUSGS NJ Water Science Center810 Bear Tavern Road, Suite 206West Trenton, NJ 08628Attn: Bob Schopp, Surface Water Specialist