Shoreline Armoring

Massive sand bags View Shoreline Armoring Gallery

This refers to the construction of seawalls, jetties, offshore breakwaters and groins intended to hold shorelines in place. Although it is well understood by scientists that armoring beaches destroys beaches on a decadal time scale, this fact is still widely unrecognized by the general public or ignored by coastal developers and engineers. The demand for armoring will become even more widespread as the rate of sea-level rise and shoreline retreat increases. A few political entities (North Carolina, USA, North Sea Coast of Holland) have outlawed armoring (with moderate success) and more should be urged to do so. There are large numbers of salesmen with “unique” types of seawalls and groins (Holmberg Device) that need to be refuted.

Definitions of Shoreline Armoring Terms

Accretion
The addition of sand to a beach allowing it to widen and build out seaward.
Groin
Groin is a structure built perpendicular to the shoreline usually of rock or metal designed to trap sand that moves in the long shore current
Hardened beach structures
A general term referring to groins, jetties, offshore breakwaters, sea walls, tombolos, or any other engineered
Jetty
A jetty is a hardened structure built at an inlet usually made of rock or metal designed to keep navigation channels from filling in with sediment
Longshore drift
Long shore drift carries sand and sediment parallel to the shore and serves as the sand source for many beaches. On the east coast of the US, the long shore current is from the north to the south.
Offshore breakwaters
An engineered structure placed offshore and parallel to the beach. Breakwaters mimic sandbars to cause waves to break, lessening erosion on the beach behind the breakwater, but interrupting the longshore drift.
Shoreline armoring
The use of groins, jetties, offshore breakwaters, sea walls, tombolos or other hardened beach structures on the shore
Sea wall
A sea wall is designed to protect the land from erosion particularly during storms and usually made of metal, wood, or rock. One of the most famous seawalls is the Galveston seawall in Galveston, TX built after the 1900 hurricane killed 6,000 people on the island.
Tombolos
Tombolos are a special type of groin built perpendicular to the shore to trap sand, but with an end parallel to the shore designed to reduce wave energy.

Surfing in / Shoreline Armoring

Florida without its beaches: Seawall dooms state oceanfronts, By Robert Young

The Florida Department of Environmental Protection issued an emergency authorization last week that will allow individual property owners in a portion of St. Johns County to build new seawalls without the typical engineering and scientific analysis. This is a terrible mistake for the communities impacted. It is poor coastal management.

Comments Off on Florida without its beaches: Seawall dooms state oceanfronts, By Robert Young

Seawalls: Ecological effects of coastal armoring in soft sediment environments

For nearly a century, America’s coasts — particularly those with large urban populations — have been armored with human made structures such as seawalls. These structures essentially draw a line in the sand that constrains the ability of the shoreline to respond to changes in sea level and other dynamic coastal processes.

Comments Off on Seawalls: Ecological effects of coastal armoring in soft sediment environments

Australia: Erosion rate rise along Victoria’s Great Ocean Road prompts effort to bolster beach sand dunes

More than 16,000 cubic metres of sand is being moved along beaches at Apollo Bay to protect the Great Ocean Road from coastal erosion.

Comments Off on Australia: Erosion rate rise along Victoria’s Great Ocean Road prompts effort to bolster beach sand dunes

Inventory Tracks ‘Armoring’ of Beaches, Inlets

The “Beach and Tidal Habitat Inventories,” covers the East Coast from Maine to the North Carolina-South Carolina border, and is based on Google Earth data that show changes in the beaches and inlets from Hurricane Sandy, and by man, from 2012 through 2015.

Comments Off on Inventory Tracks ‘Armoring’ of Beaches, Inlets

Bills would ease rules on sandbags, pumping sand from shoals; NC

The Senate and House are finalizing another set of enviromental regulations, including one that loosens rules on sandbag walls and another that would allow using sand from Diamond Shoals for beach nourishment without testing it first.

Comments Off on Bills would ease rules on sandbags, pumping sand from shoals; NC

Let’s end war with ocean, Op-Ed by Orrin H. Pilkey

The immediate future most certainly holds more miles of sandbags, resulting in more narrowed and ugly beaches.But this trend can be halted and reversed. Now is the time to make peace with the ocean.The time is now to stop sandbagging, both physically with no more shore-hardening structures, and politically with no more exceptions to the intent of the rules, no more undermining existing legislation, and a return to enforcement.

Comments Off on Let’s end war with ocean, Op-Ed by Orrin H. Pilkey

Goleta Beach vs. Winter Swells, CA

This is the third winter in four years that Goleta Beach Park has taken a beating in the winter swells. Even behind the boulders- dropped along 950 feet of beach at a cost of $275,000 – the park bluff is retreating, unprotected by a ripped out $350,000 barrier of plastic mesh, that had been stacked against the bluffs last spring.

Comments Off on Goleta Beach vs. Winter Swells, CA

Sandbags remain hard problem to solve along N.C. coast

Make an earnest effort to remove the sandbags from your beach. Under state law, sandbags are only supposed to stay on the beach for a two- to five-year window.

Comments Off on Sandbags remain hard problem to solve along N.C. coast

Shifting sands: Santa Cruz, scientists, Boardwalk fighting battle against erosion

Millions of people come to the Santa Cruz Boardwalk each year to body surf, enjoy the rides or simply soak up the California sun. But few of them notice the dramatic, relentless changes in the city’s coastline that are wreaking havoc on the beloved amusement park.

Comments Off on Shifting sands: Santa Cruz, scientists, Boardwalk fighting battle against erosion

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  • Recent / Shoreline Armoring

    Florida without its beaches: Seawall dooms state oceanfronts, By Robert Young

    September 25th, 2017

    The Florida Department of Environmental Protection issued an emergency authorization last week that will allow individual property owners in a portion of St. Johns County to build new seawalls without the typical engineering and scientific analysis. This is a terrible mistake for the communities impacted. It is poor coastal management.

    Read More

    Seawalls: Ecological effects of coastal armoring in soft sediment environments

    July 27th, 2017

    For nearly a century, America’s coasts — particularly those with large urban populations — have been armored with human made structures such as seawalls. These structures essentially draw a line in the sand that constrains the ability of the shoreline to respond to changes in sea level and other dynamic coastal processes.

    Read More

    Australia: Erosion rate rise along Victoria’s Great Ocean Road prompts effort to bolster beach sand dunes

    May 23rd, 2017

    More than 16,000 cubic metres of sand is being moved along beaches at Apollo Bay to protect the Great Ocean Road from coastal erosion.

    Read More

    Inventory Tracks ‘Armoring’ of Beaches, Inlets

    April 17th, 2017

    The “Beach and Tidal Habitat Inventories,” covers the East Coast from Maine to the North Carolina-South Carolina border, and is based on Google Earth data that show changes in the beaches and inlets from Hurricane Sandy, and by man, from 2012 through 2015.

    Read More

    Bills would ease rules on sandbags, pumping sand from shoals; NC

    April 8th, 2017

    The Senate and House are finalizing another set of enviromental regulations, including one that loosens rules on sandbag walls and another that would allow using sand from Diamond Shoals for beach nourishment without testing it first.

    Read More

    Let’s end war with ocean, Op-Ed by Orrin H. Pilkey

    April 5th, 2017

    The immediate future most certainly holds more miles of sandbags, resulting in more narrowed and ugly beaches.But this trend can be halted and reversed. Now is the time to make peace with the ocean.The time is now to stop sandbagging, both physically with no more shore-hardening structures, and politically with no more exceptions to the intent of the rules, no more undermining existing legislation, and a return to enforcement.

    Read More

    Goleta Beach vs. Winter Swells, CA

    March 11th, 2017

    This is the third winter in four years that Goleta Beach Park has taken a beating in the winter swells. Even behind the boulders- dropped along 950 feet of beach at a cost of $275,000 – the park bluff is retreating, unprotected by a ripped out $350,000 barrier of plastic mesh, that had been stacked against the bluffs last spring.

    Read More

    Sandbags remain hard problem to solve along N.C. coast

    February 10th, 2017

    Make an earnest effort to remove the sandbags from your beach. Under state law, sandbags are only supposed to stay on the beach for a two- to five-year window.

    Read More

    Shifting sands: Santa Cruz, scientists, Boardwalk fighting battle against erosion

    January 22nd, 2017

    Millions of people come to the Santa Cruz Boardwalk each year to body surf, enjoy the rides or simply soak up the California sun. But few of them notice the dramatic, relentless changes in the city’s coastline that are wreaking havoc on the beloved amusement park.

    Read More

    Vietnam battles erosion of beaches – and of tourism

    December 10th, 2016

    Walking along Cua Dai is like visiting a beach-restoration technology exhibition, with efforts ranging from stone seawalls to fiber-and-sand wave breakers.

    Read More