July 14, The Beaches Conference Greg Berman (WHOI Sea Grant & Cape Cod Cooperative Extension)
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1 July 14, 2017 The Beaches Conference 2017 Greg Berman (WHOI Sea Grant & Cape Cod Cooperative Extension)
2 Annual downscaled global tropical cyclones, averaged over the six models. Uses data from IPCC Fifth Assessment Report (2013). K. Emanuel., PNAS, 20 January 2013 The Risk Is Increasing December 2013 SLR Global Massachusetts Storms robust increase in the frequency of North Atlantic tropical cyclones.
3 Coastal Adaptation On Cape Cod we manage at parcel scale
4 What is Erosion?
5 The Erosion Problem: Education Perspectives It s all sediment transport! What is Erosion???... just more leaving than coming in Accretion Static Equilibrium Erosion
6 Parallel Transport.Blocked LST +3 /yr +4 /yr +5 /yr +8 /yr -2 /yr -2 /yr -1 /yr 0 /yr Direction of Longshore Current Direction of Longshore Current Deposition Erosion Coastal Structure Downdrift Source: MORIS: CZM s Online Mapping Tool
7 Perpendicular Transport.Blocked input 1.3mi
8 Shoreline Stabilization
9 1. Will system recover by itself? 2. How far is the structure from the water? Photo Credit: Ann McNichol
10 Plant Natives: Root systems stabilize. Take up water. Break the impact of raindrops or wave-splash. Slow down runoff Remove Invasive
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12 Horizontal V E R T I C A L
13 = Fill of a CRA Photo Credit: Ted Keon Sacrificial Cobble (Mixed) Photo Credit: CZM
14 Popponesset Beach South Cape Beach Before After Repair Before Repair After
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19 Diameter 12-20
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21 Coir Envelopes
22 Coir Envelopes Photo Credit: 2Fathom
23 Coir Envelopes
24 Coir Envelopes C E S WPA: Coastal engineering structure means, but is not limited to, any breakwater, bulkhead, groin, jetty, revetment, seawall, weir, riprap or any other structure that is designed to alter wave, tidal or sediment transport processes in order to protect inland or upland structures from the effects of such processes.
25 The Spectrum of Coastal Erosion Control Methods Coir Envelopes C E S Groin notch Direction of Longshore Current Direction of Longshore Current Deposition Erosion Coastal Structure Downdrift
26 The Spectrum of Coastal Erosion Control Methods Coir Envelopes C E S Groin Source: MORIS: CZM s Online Mapping Tool +3 /yr +4 /yr +5 /yr +8 /yr -2 /yr -2 /yr -1 /yr 0 /yr Jetty
27 Coir Envelopes C E S Groin Sand Bags Jetty
28 Gabion (10-20 yrs) Coir Envelopes C E S Groin Sand Bags Gabion Jetty
29 Coir Envelopes C E S Groin Sand Bags Gabion Breakwater / Sill Jetty
30 Coir Envelopes C E S Groin Sand Bags Gabion Breakwater / Sill Revetment 1.3mi Jetty
31 Beach loss eventually occurs in front of a seawall for a beach experiencing net longterm retreat. A beach undergoing net longterm retreat will maintain its natural width. Images adapted from Natural Hazard Considerations for Purchasing Coastal Real Estate in Hawaii - A Practical Guide of Common Questions and Answers, by University of Hawaii Sea Grant College Program, 2006.
32 Coir Envelopes C E S Groin Sand Bags Gabion Breakwater / Sill Revetment Jetty Seawall
33 Coir Envelopes C E S Groin Sand Bags Gabion Breakwater / Sill Revetment Jetty Seawall
34 Coir Envelopes C E S Groin Sand Bags Gabion Breakwater / Sill Revetment Jetty Seawall
35 Coir Envelopes C E S Groin Sand Bags Gabion Breakwater / Sill Revetment Jetty Seawall Bulkhead
36 The Spectrum of Coastal Erosion Control Methods Coir Envelopes C E S Groin Jetty Sand Bags Gabion Breakwater / Sill Revetment Seawall Bulkhead How the Spectrum could be used: Notice of Intent (NOI) Alternative Analysis start at top and move down, explaining why each one isn t suitable.
37 The Spectrum of Coastal Erosion Control Methods Coir Envelopes C E S Groin Jetty Sand Bags Gabion Breakwater / Sill Revetment Seawall Bulkhead Not a complete list (and methods are being invented/modified)
38 The Spectrum of Coastal Erosion Control Methods Coir Envelopes C E S Groin Jetty Sand Bags Gabion Breakwater / Sill Revetment Seawall Bulkhead Not a complete list (and methods are being invented/modified) Very few projects only employ 1 method, and when we are determining if it s a CES we need to use the hardest aspect of the project.
39 Combination Coir Envelopes C E S Groin Sand Bags Gabion Breakwater / Sill Revetment Jetty Seawall Bulkhead
40 Combination Coir Envelopes C E S Groin Sand Bags Gabion Breakwater / Sill Revetment Jetty Seawall Bulkhead
41 Coir Envelopes C E S Groin Sand Bags Gabion Breakwater / Sill Revetment Jetty Seawall Bulkhead Combination
42 Combination Coir Envelopes C E S Groin Sand Bags Gabion Breakwater / Sill Revetment Jetty Seawall Bulkhead
43 Resilience Natural Systems Questions?
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