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Stone jetty, Cape Cod National Seashore, 2015.

Groins and jetties are shore-perpendicular structures built along a shoreline to hold sand in place. Groins are smaller structures built to trap sand and stabilize a sandy beach, typically made of steel, timber or stone. Jetties are large structures typcally used to stabilize inlet channels. Both structures interrupt longshore sand transport and accrete sand on their updrift side while erosion occurs on their downdrift side.

U.S. National Park Service

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Cape Cod National Seashore, Code: CACO

National Park Service Facebook Photos

Title: Cape Cod National Seashore
URL: https://www.facebook.com/CapeCodNPS/?fref=ts

20141222

12/22/2014

Public Can View

Organization: Cape Cod National Seashore
Address: 99 Marconi Site Road, Wellfleet, MA 02667

Friday, December 9, 2016 1:50:00 PM

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