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VALIDATION OF AN ULTRAVALIDATION OF AN ULTRA

HIGH FREQUENCY RADARHIGH FREQUENCY RADAR

(RIVER SONDE) FOR(RIVER SONDE) FOR

CURRENT MAPPING INCURRENT MAPPING IN

THE URBANIZED HUDSONTHE URBANIZED HUDSONRIVER ESTUARYRIVER ESTUARY2010 summer research institute at DHS

-National Center for Secure and

-Resilient Marine CommerceDakota GoldingerDanielle HoldenOmar LopezLenny Llauger

Shankar NilakantanAngelica Sogor

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Overview

What is River Sonde? How River Sonde was used at Stevens

Institute of Technology, summer 2010

Results: Did the River Sonde accuratelymeasure river currents?

Applications of River Sonde

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What is River Sonde?

An Ultra High Frequency Radar: 450 MHzpropagated

3 antennas, uses Doppler Shift to measureriver surface properties.

Signal waves are emitted from the radars

transmitter. After signal waves bounce offsurface gravity water waves, a receiverprocesses the data.

Surface current velocitiesWind Direction

Waves

Significant Wave Height

Wave PeriodPeak Wave Direction

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ummer esearcInstitutePurpose: To determine whether the RiverSonde accurately measured currents.

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Antenna Pattern Measurement -Calibration

Babbio Center

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Comparing River Sonde

Compared with two existing river observation andprediction systems:

1. NYHOPS buoy Wind speeds (knots) versus number of EM waves

received after bouncing off river surface

2. NOAA tidal model and gauges Tidal heights vs. current velocities and intensity

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Radial vector map from 1Riversonde

BABBIO

d i h

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Compared with a NYHOPSbuoy. , , / , .1 measures surface currents water level wind direction speed etc

.2 provided tidal measurements

. :3 used two stations in Manhattan waters for validation

Pier 40 and Castle Point

Vectors

WindVelocity

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GGGGG

GGGGGG

GGgG

NOAA ComparisonDown river

Up river

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Applications of River Sonde

in New York Harbor Estuary 200 miles of PCB contaminated areas in HudsonRiver Construction Storm events

River Sonde network can track and predictWWTPs outflow plumes Any plumes

Strong salinity front and high tidal flow from the

lower Hudson estuary upstream are trackable

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Summary

Student internship deployed andoperated the first River Sonde on the eastcoast during the summer of 2010We compared currents from the RiverSonde to models and other

measurements with good results.Applications for improved transportmonitoring in the Hudson River are nowbeing investigated