Hydrologic Feasibility of Storm Surge Barriers to Protect the - - PowerPoint PPT Presentation

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Hydrologic Feasibility of Storm Surge Barriers to Protect the - - PowerPoint PPT Presentation

Jul 17, 2023 173 likes •413 views

Hydrologic Feasibility of Storm Surge Barriers to Protect the Metropolitan NY/NJ Region Malcolm J. Bowman, PhD Roger D. Flood, PhD Douglas Hill, EngScD, PE Robert E. Wilson, PhD Marine Sciences Research Center, State University of New York,

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Hydrologic Feasibility of Storm Surge Barriers to Protect the Metropolitan NY/NJ Region

Malcolm J. Bowman, PhD Roger D. Flood, PhD Douglas Hill, EngScD, PE Robert E. Wilson, PhD

Marine Sciences Research Center, State University of New York, Stony Brook, NY

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SLIDE 2

The Threat

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SLIDE 3
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New York City Flooding

Source: Metro New York Hurricane Transportation Study, 1995

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Hurricane Storm Surge

21-22 September 1938 hurricane Source: N.A. Pore and C.S. Barrientos, Storm Surge, 1976

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Nor’easter Storm Surge

5-8 March 1962 storm Source: N.A. Pore and C.S Barrientos, Storm Surge, 1976.

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1992 Nor’easter Flooding

Source: Metro New York Hurricane Transportation Study, 1995

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100-Year Flood (Now)

Source: V.M. Gornitz, Metropolitan East Coast Assessment, 2000

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NYC Rise in Sea Level

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Mean Sea Level (m.)

1850 1900 1950 2000 2050 2100

Time (yrs.) Source: Robert J. Nicholls Observations Projection

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Flood Height vs. Return Period

(by 2090s)

Source: V.M. Gornitz, Metropolitan East Coast Assessment, 2000

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SLIDE 11

Flood Height vs. Return Period

(2020s, 2050s, 2080s)

Source: V.M. Gornitz, Metropolitan East Coast Assessment, 2000

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River Flooding

  • Tidal flow 10 to 100 times river flow
  • >50% of Hudson flow in April & May
  • Flooding usually in upstate NY and NJ
  • 29.6 ft above flood level in Troy, NY, 1996
  • NJ flood-diversion tunnel into Newark Bay
  • Climate change possibilities
  • More precipitation extremes
  • Change in snow melt
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The Concept

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Location of Barriers

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Thames River Tidal Barrage

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Hollandsche Ijssel, The Netherlands

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Eastern Scheldt, The Netherlands

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Venice Lagoon Design

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East River Tide Gates (1)

~$0.5 billion Parsons Brinckerhoff Quade & Douglas (1993)

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East River Tide Gates (2)

~$1 billion TAMS Consultants, Inc. (1993)

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Scenario Analysis

  • Type of storm (Nor’easter or hurricane)
  • Severity of storm
  • Sea level
  • Location of barriers
  • Combination of barriers closed
  • Sequence of barrier operations
  • (Possibly) barrier height & bottom changes
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Deliverables

  • Conclusion: Would storm surge barriers

work?

  • Maps showing flooding inside and outside

barriers in various scenarios

  • Strategies for barrier operations
  • Identification of trade-offs in flooding

inside and outside barriers

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