• Home
  • About Us
  • Coastal Topics
  • More
    • Home
    • About Us
    • Coastal Topics
  • Home
  • About Us
  • Coastal Topics

Beach Replenishment

What is Beach Replenishment

Beach Replenishment is when sand is added to an eroded part of a beach to create a buffer against storms. Read below to learn more about beach replenishment and how it affects our coastlines.

The Benefits of Beach Replenishment

Long Beach Island April 2013

Long Beach Island September 2013

Long Beach Island September 2013

Prior to beach replenishment, the beach has a small volume of sand. The coastline is susceptible to further storm damage. In addition to storm damage, eroded beaches can hurt tourism and recreational value of the coastline. 


Image Source: Google Images

Long Beach Island September 2013

Long Beach Island September 2013

Long Beach Island September 2013

After beach replenishment is done, the size of the beach is greatly increased. A larger beach profile provides greater protection against storms. Wider beach profiles save coastal areas money by preventing flood and storm damage.


Image Source: Google Images 

How Beach Replenishment Protects Coasts

Beach Width and Flood Protection

What Does Erosion at a Beach Look Like?

Erosion at high tide line along Delaware Bay beach (Image Source: Rory Hogan)

Severe beach erosion following Hurricane Sandy (Image Source: Stockton University)

Erosion of Delaware Bay Beach (Image Source: Rory Hogan)

Erosion of dune system along Atlantic Coastline (Image Source: Stockton University)

Erosion of dune system along Atlantic Coastline (Image Source: Stockton University)

How Often is Beach Replenishment Done?

In total:

Since 1936 New Jersey has been conducting beach replenishment projects. Most of those projects occurred in Cape May County (146 total projects). Cape may is followed by Monmouth County (86 projects) and then Ocean County (74 projects). For more data on beach replenishment projects in New Jersey click the button below:

PSDS Database

What time of year are projects done:

Typically replenishment projects are done in the spring. If done in the winter, there is a risk that placed sand will be eroded by higher wave activity. 

How often are projects done:

Beach replenishment projects are done every few years at a location. Time between projects can vary based on rates of erosion at the location. However, for a project to be done, it must pass a cost benefit analysis. In a cost benefit analysis, the benefits provided by completing a project must surpass the cost of conducting the project.

How Much Does Beach Replenishment Cost?

New Jersey has spent $2.98 billion on beach replenishment projects since 1936


New Jersey Spotlight News

Who pays for this?

For Federal beach replenishment projects the cost is divided three ways among the federal, state, and local governments. The federal government will pay 65% of the projects costs. Of the remaining 35% the state will pay 75% and the local government will pay the remaining 25%. 

How is Beach Replenishment Done?

Sourcing Sediment

Post Project Monitoring

Sediment Compatibility

Sand used for beach replenishment is usually dredge material but can also be sourced from inland sources. To see how dredged material makes its way to project sites, watch the video below

WAVY TV 10

Sediment Compatibility

Post Project Monitoring

Sediment Compatibility

For projects to be successful, the placed sand has to be compatible with the native beach. Sediment compatibility is based on a lot of factors including grain size, sediment sorting, and sand color. For more information on coastal sediments and how beach compatibility is calculated, check the USACE Coastal Engineering Manual Part 3 

USACE Coastal Engineering Manual

Post Project Monitoring

Post Project Monitoring

Post Project Monitoring

After beach replenishment has been done, it is important to monitor beaches for future erosion. Stockton University's Coastal Research Center helps communities along New Jersey's coast monitor their shoreline for erosion. For more information click below to view annual reports for coastal municipalities.

Stockton University Annual Reports

Additional Resources

Beach Replenishment Project Photos National Beach Nourishment DatabseDredging Sand for Beach Replenishment

References


  • New Jersey Department of Environmental Protection. 2024. Federal project partnerships. NJDEP. [Accessed 20 April 2024.] NJDEP| Watershed & Land Management | Federal Project Partnerships
  • New Jersey Spotlight News. 2023. $3B.[Accessed 20 April 2024]. Almost $3B has been spent on NJ beach replenishment since 1936 | NJ Spotlight News
  • United States Army Corps. of Engineers. 2024. Beach nourishment. USACE. [Accessed 20 April 2024]. Beach Nourishment (army.mil)
  • West Carolina University. 2024. Program for the study of developed shorelines. [Accessed 20 April 2024]. Program for the Study of Developed Shorelines | (wcu.edu)

Copyright © 2024 sucri.org - All Rights Reserved.

Powered by GoDaddy

This website uses cookies.

We use cookies to analyze website traffic and optimize your website experience. By accepting our use of cookies, your data will be aggregated with all other user data.

Accept