Hudson river watershed sediment transport following tropical storms irene and lee
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Hudson River Watershed Sediment Transport following Tropical Storms Irene and Lee. Gary R. Wall and Timothy F. Hoffman U.S. Geological Survey New York Water Science Center. In cooperation with:. Mohawk River @ Cohoes 8/29/11 101,000 ft 3 /sec 2,200 mg/L. Upper Hudson.

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Hudson river watershed sediment transport following tropical storms irene and lee

Hudson River Watershed Sediment Transport following Tropical Storms Irene and Lee

Gary R. Wall and Timothy F. Hoffman

U.S. Geological Survey

New York Water Science Center

In cooperation with:

Mohawk River @ Cohoes 8/29/11 101,000 ft3/sec

2,200 mg/L


Upper Hudson Storms Irene and Lee

USGS Suspended-Sediment Monitoring Stations

Mohawk

Normanskill

Kinderhook

Catskill

RoJan

Rondout

Poughkeepsie


Upper Hudson Storms Irene and Lee

USGS Suspended-Sediment Monitoring Stations

Mohawk

Normanskill

Kinderhook

Catskill

RoJan

Esopus

Rondout

Poughkeepsie


Methodology
Methodology Storms Irene and Lee

  • River Discharge x Sediment Concentration = Mass of sediment per unit time (Tons/day)

  • Need a continuous record of both

    • USGS stream gages provide continuous discharge

    • High frequency sampling or a continuous surrogate provide sediment concentration


Methodology1
Methodology Storms Irene and Lee

  • High-frequency sampling


Methodology2
Methodology Storms Irene and Lee

  • Surrogate

Catskill

Rondout

Log10 Suspended Sediment Concentration

Kinderhook

Roeliff Jansen

Log10 Turbidity


Head of tide results
Head-of-Tide Results Storms Irene and Lee

Schoharie Creek

Mohawk River


Head of tide results1
Head-of-Tide Results Storms Irene and Lee


How much is 1 75 million tons of sediment
How much is 1.75 million tons of sediment? Storms Irene and Lee

This truck can carry 400 tons…


Cary Institute Storms Irene and Lee

4,375 trucks

Bumper-to-bumper

Both directions


Lower hudson tributary results
Lower Hudson Tributary Results Storms Irene and Lee

Catskill Creek near Catskill 9/7/11 – 29,000 ft3/sec ~1,700 mg/L


Lower hudson tributary loads
Lower Hudson Tributary Loads Storms Irene and Lee

* Irene only


Tributary yields
Tributary Yields Storms Irene and Lee

* Irene only


Upper Hudson Storms Irene and Lee

Mohawk

Normanskill

Kinderhook

Catskill

National Weather Service Radar-Based Precipitation Estimates for TS Irene

RoJan

Esopus

Rondout

Poughkeepsie Gage


Poughkeepsie results
Poughkeepsie Results Storms Irene and Lee


Institute Storms Irene and Lee


Poughkeepsie results1
Poughkeepsie Results Storms Irene and Lee

Concentration x Discharge = 1 million tons of suspended sediment through mid-October 2011


Green Island Dam Storms Irene and Lee

1.75 million

tons

West-of-Hudson

tributaries

95,000 tons

~1.75 million

tons trapped

900,000 tons

East-of-Hudson

tributaries

Poughkeepsie

1 million

tons


Hudson River near Poughkeepsie 8/30/11 Storms Irene and Lee

Net Discharge = 170,000 ft3/sec , 248mg/L

Acknowledgements:

  • DEC Hudson River Estuary Program and Div. of Water

  • EPA Harbor Estuary Program

  • NEIWPCC

  • Stuart Findlay – Cary Institute

  • Randy Alstadt – City of Poughkeepsie

  • Hudson River Foundation

  • HRECOS

  • National Weather Service


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