The Hudson River Sustainable Shorelines Project : Engineering

8/11/2019 The Hudson River Sustainable Shorelines Project : Engineering

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The Hudson River Sustainable

Shorelines Project : Engineering

Jon K. Miller, Ph.D. and Andrew Rella

Stevens Institute of Technology

And a cast of thousands including: Betsy Blair, Emilie Hauser, Dan Miller,Stuart Findlay, Dave Strayer, Kristen Marcell, Ona Ferguson, Nickitas

Georgas, and

Cary Institute of Ecosystem Studies, Consensus Building Institute, Hudson RiverNational Estuarine Research Reserve, New York State Department of Environmental

Conservation, Stevens Institute of Technology, and other partners

Major Tasks to Date

Literature Review of Sheltered Shoreline

Stabilization Approaches (2009-2011)

Cost Analysis (2009-2012)

Physical Forces Analysis(2011-2013)

Forensic Analysis (2013-14)


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A Literature Review of Existing Methods for Limiting

Erosion along Sheltered Shorelines

29 Techniques Identified

Traditional Approaches

Bulkheads

Gabions

Groins

Rip-rap Revetments

Hybrid Approaches

Sills

Live Crib Wall

Joint Planting

BiowallsNatural Approaches

Living breakwaters

Coconut Fiber Rolls

http://hrnerr.thewordpressdesigner.com/files/2012/08/RellaMiller2012a_EngineeringLiteratureReview.pdf

Groin/Stream Barb

Green Wall/Bio Wall

Live Crib

Wall

Joint Planting/

Live Stakes
http://hrnerr.thewordpressdesigner.com/files/2012/08/RellaMiller2012a_EngineeringLiteratureReview.pdfhttp://hrnerr.thewordpressdesigner.com/files/2012/08/RellaMiller2012a_EngineeringLiteratureReview.pdf


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Finished Product

Finished Product


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A Comparative Cost Analysis

9 Stabilization Approaches Wood and Steel Bulkheads

Crib Walls

Live Crib Walls

Revetments

Rip-Rap

Joint Planting

Bio Wall

Sill

Vegetative Geogrid

3 sites Poughkeepsie,

Henry Hudson Park (Albany),

Bowline Point Park (Haverstraw)

2 Sea Level Rise Scenarios Current Rate (2.77mm/yr),

Rapid Ice Melt (48 by 2080)

http://hrnerr.thewordpressdesigner.com/files/2012/08/Comparative-Cost-Analysis.pdf

Cost analysis includes: Initial Costs (IC)

Material and labor costs to construct the stabilization measure

Maintenance and Repair Costs (M&R)

Costs associated with routine maintenance and repairs (i.e. not

associated with any given storm)

Damage Costs (DC)

Costs associated with restoring a structure to its original function after a

specific storm causes damage

Replacement Costs (RC)

Costs of replacing a structure once it reaches the end of its serviceable

life. (Typically associated with material decay/degredation)
http://hrnerr.thewordpressdesigner.com/files/2012/08/Comparative-Cost-Analysis.pdfhttp://hrnerr.thewordpressdesigner.com/files/2012/08/Comparative-Cost-Analysis.pdfhttp://hrnerr.thewordpressdesigner.com/files/2012/08/Comparative-Cost-Analysis.pdfhttp://hrnerr.thewordpressdesigner.com/files/2012/08/Comparative-Cost-Analysis.pdfhttp://hrnerr.thewordpressdesigner.com/files/2012/08/Comparative-Cost-Analysis.pdfhttp://hrnerr.thewordpressdesigner.com/files/2012/08/Comparative-Cost-Analysis.pdf


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Designs based on:

Data as originally presented in the Alden & ASA

(2006) report.

Additional information on wind wave climate.

Main features considered so that reasonably

accurate quantities could be developed.

Wakes & Ice considered crudely through application

of rules of thumb as detailed information for eachsite was not available.

Initial Costs

Based on material & labor or bulk costs

Every attempt was made to be consistent

within and across methods

Cost information was obtained from a

combination of research studies and actualrecent construction bids

Significant variability


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M&R costs increased for vegetated (+10%) and wood (+5%) structures

Number of storms likely to be encountered and the damage costs resulting

from them increase with SLR.

Since the rate of SLR increases under the rapid sea level rise scenario, the

70-yr period is discretized into two 25-yr periods and a 20-yr period

Consideration of Sea Level Rise:

Wood Bulkhead Cost Estimate

Initial Cost (IC) $ 171,500

Current Rate of SLR

Period 1 (2012-2037) Period 2 (2037-2062) Period 3 (2062-2082) Total (2012-2082)

Category Storm Tr % IC # Events *Cost # Events *Cost # Events *Cost Extended Cost % Final

Damage Cost (DC) 50 10% 0.56 $ 7,220 0.75 $ 5,566 1.01 $ 4,537 $ 17,323 4.6%

Damage Cost (DC) 25 5% 1.13 $ 7,302 1.53 $ 5,686 2.14 $ 4,789 $ 17,776 4.7%

Replacement Cost (RC) 100% 0.00 $ - 1.00 $ 74,139 1.00 $ 44,825 $ 118,965 31.7%

Maintenance Cost (MC) 20% 1.00 $ 25,935 1.00 $ 14,828 1.00 $ 8,965 $ 49,728 13.3%

Post-Construction Costs (DCs+RC+MC) $ 203,792 54.3%

Initial Cost (IC) $ 171,500 45.7%

*Costs are calculated as the IC x %IC x #Events with inflation and discounting applied mid period Total Cost $ 375,292 100.0%

Rapid Ice Melt Rate of SLR

Period 1 (2012-2037) Period 2 (2037-2062) Period 3 (2062-2082) Total (2012-2082)

Category Storm Tr % IC # Events *Cost # Events *Cost # Events *Cost Extended Cost % Final

Damage Cost (DC) 50 10% 1.35 $ 17,524 9.26 $ 68,648 25.00 $ 112,063 $ 198,234 28.8%

Damage Cost (DC) 25 5% 3.01 $ 19,530 16.67 $ 61,783 25.00 $ 56,031 $ 137,344 20.0%

Replacement Cost (RC) 100% 0.00 $ - 1.00 $ 74,139 1.00 $ 44,825 $ 118,965 17.3%

Maintenance Cost (MC) 25% 1.00 $ 32,419 1 .00 $ 18,535 1.00 $ 11,206 $ 62,160 9.0%

Post-Construction Costs (DCs+RC+MC) $ 516,703 75.1%

Initial Cost (IC) $ 171,500 24.9%

*Costs are calculated as the IC x %IC x #Events with inflation and discounting applied mid period Total Cost $ 688,203 100.0%


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Several alternatives

exist at each site forwhich the costs arerelatively similar.

Alternativesolutions can becost competitivewith traditionalapproaches

(Consistent withNOAAs WeighingYour Options report.)

Finished Product

Physical Forces Characterization

Characterization of the physical environments ofthe Hudson River

Wakes

Ice

Water Levels

Currents

Stresses

Surface wind waves

http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/

http://gis.ny.gov/gisdata/inventories/details.cfm?DSID=1136
http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://gis.ny.gov/gisdata/inventories/details.cfm?DSID=1136http://gis.ny.gov/gisdata/inventories/details.cfm?DSID=1136http://gis.ny.gov/gisdata/inventories/details.cfm?DSID=1136http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/physical-forces-statistics/


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Wakes Analysis Wakes were observed at a

final number of 32 sites over

the course of 4 days

Analytical approach will be

utilized to supplement data

http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/

Ice ReportsIce climatology developed based on Coast Guard reports

1) The 16 ice regions of the tidal Hudson. 2) % of ice season days (December-March) with ice present, by region. 3) Prevalent Ice Type whenice present. 4) Median Ice covered area; % of each region, median of all days with ice reported. 5) Median ice thickness; inches of ice byregion, median of alldays with ice reported. 6) 95th percentile of ice thickness; inches of ice by region, 95% of all days with ice reported hadice thinner than this value. (http://www.hrnerr.org/hudson-river-sustainable-shorelines/shorelines-engineering/ice-conditions/)


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1

1 Year Retrospective Study

Considering;

6 structures

3 Traditional Hard Engineered Structures

3 Ecologically Enhanced Shorelines

3 Storm Events

Tropical Storm Lee (Rainfall Event)

Post Tropical Storm Sandy (Wind and Surge Event)

Tropical Storm Irene (Rainfall, Surge and Wind Event)

Forensic Analysis of Shoreline

Performance During 3 Extreme Storms

Objectives

1) Characterize the conditions of traditional and

non-traditional treatments at 4 6 sites to

understand the determinants of success or

failure during extreme weather events.

2) Characterize the impacts experienced at all 3

sites during each of the three storm events.


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Forensic Analysis

Integration of all available information todetermine the root-causes of the success or

failure

Stabilization History (Pre-Storm)

Initial Characterization (Post Storm)

Engineering Data (Pre-Storm)

Field Data (Post Storm)Storm Hind-Casts (During Storm)

Typical Reasons for Shoreline Failure

Under estimation of the design loads/physical

forces

Improper construction techniques

Material failure

Lack of required maintenance


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Anticipated Products

2 4 page short reports (hard/web)

Description of site

Summary of research and findings

Technical Report detailing methodology

Journal Publication

Outreach Materials

Final Presentations

Questions? For More Info

Jon Miller

Davidson Laboratory

Stevens Institute of Technology

711 Hudson Street, Hoboken, NJ

[email protected] Ph:201-216-8591

Andrew Rella

Davidson Laboratory

Stevens Institute of Technology711 Hudson Street, Hoboken, NJ

[email protected]: 917-415-3182

Visit:

http://www.hrnerr.org/hudson-river-sustainable-

shorelines/
mailto:[email protected]:[email protected]://www.hrnerr.org/hudson-river-sustainable-shorelines/http://www.hrnerr.org/hudson-river-sustainable-shorelines/http://www.hrnerr.org/hudson-river-sustainable-shorelines/http://www.hrnerr.org/hudson-river-sustainable-shorelines/http://www.hrnerr.org/hudson-river-sustainable-shorelines/http://www.hrnerr.org/hudson-river-sustainable-shorelines/http://www.hrnerr.org/hudson-river-sustainable-shorelines/http://www.hrnerr.org/hudson-river-sustainable-shorelines/http://www.hrnerr.org/hudson-river-sustainable-shorelines/mailto:[email protected]:[email protected]

The Hudson River Sustainable Shorelines Project : Engineering

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