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Evaluate the following physical forces along the Hudsons shores:
GROUP A
CurrentsWaves
GROUP B
IceWakes
Numerical Modeling
Empirical Data
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Depth, mHudson region of the 7-state-wide,
Stevens NYHOPS OFS.
A great forecast model
used by the NWS,USCG SAR, NOAA HAZMAT,
Hudson River Pilots, among others.
The NYHOPS OFS grid includes the
whole tidal Hudson up to Troy.
But the computational grid is
somewhat coarse.
2,444 boxes used to describe the
Hudson from Battery to Troy.
www.stevens.edu/NYHOPSThe Battery
Poughkeepsie
Poughkeepsie
Troy
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Depth, mBased on the NYHOPS hydrodynamic
model, we built an ultra-high
resolution grid.
And then coupled the forces that
move the water to it, in a more
accurate and distributed manner.
E.g. Better shoreline definition,tributary networks, etc.
2,444 boxes in NYHOPS OFS ->
77,452 boxes up to NYSDEC coastline
-> 114,464 boxes up to +10m NAVD88
contour.
Almost two orders of magnitude
increase in generated information.
The Battery
Poughkeepsie
Poughkeepsie
Troy
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Anticipated products from the numerical model
Basic (mean and standard deviation)
and probability statistics (percentiles) for:
Water Level
Depth-averaged Current Components (u, v)
Depth-averaged SpeedSignificant Wave Height
Peak Wave Period
Vertical Water Level Datum
Based on a 365 day simulation on the ultra res grid.
Time series extracted at each cell on or near the NYSDEC shoreline.
Geo-referenced information (GIS layers).
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Windspeed
m/s
SignificantWaveheigh
t
m
The Battery
GWB
West Point
Poughkeepsie
Albany
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Windspeed
m/s
WaterLevel
m
The Battery
GWB
West Point
Poughkeepsie
Albany
RMS=0.3(0.2%)
RMS=4.3 (3.4%)
RMS=3.6 (3.8%)
RMS=4.4 (4.7%)
RMS=7.0 (5.0%)
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The Battery
GWB
West Point
Poughkeepsie
Albany
Hastings
Pier 40
RMS=0.3 (0.4%)
RMS=2.0 (3.4%)
RMS=3.4 (6.3%)
RMS=3.3 (6.6%)
RMS=2.7 (4.0%)
RMS=2.2 (3.9%)
RMS=1.7 (2.5%)
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Windspeed
m/s
AlongshoreCurrent
m/s
West Point
Poughkeepsie
Albany
MohawkatCo
hoes
m3/s
The river that flows both ways
though not always
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Ultra high resolution model
Computationally expensive
Had to scale floodplain back to the NYSDEC shoreline
Presently on its 5th
month in 2D mode, and counting.
3D takes much longer (a day for a day).
But seems to be creating somewhat better results.
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Hudson River Ice Climatology
A GIS layer of ice probabilities along the Hudson River
Will serve as example for other products:
* Wake Study* Modeling study (waves, currents, water levels)
So lets review in detail
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GWB
Troy
West Pt
Norrie Pt
Catskill
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Ice Season: December to March each year
U.S.C.G. files daily ice reports
Available to us since 2005.
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GWB
Troy
West Pt
Norrie Pt
Catskill
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1 2 3 4 5 6
1. Ice regions. 2. Ice occurrence (% of ice season). 3. Prevalent ice type. 4. Median ice covered area, % of region (*).5. Median ice thickness, inches (*). 6. 95th percentile ice thickness, inches (*). (*) When ice present.
POC: Nickitas Georgas ([email protected])
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Journal of Physical Oceanography 2011
Decrease in tidal range
Increase in range
Increase in mean water level setup
Decrease in tidal current range
Only ebb at Albany!
Flood
Ebb
Increase in tidalcurrent range
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Complete floodplain grid to +10m NAVD88 Ice climatology
mailto:[email protected]