Images showing an eroded beach with signs that beach is closed
Dale Gerhard, Press of Atlantic City/AP Images (Beach); Julio Cortez/AP Images (Closed)

How to Save a Beach

Can people stop shorelines from being washed out to sea?

By Mara Grunbaum
From the May/June 2024 Issue

Learning Objective: Students will observe and explain how erosion can change a beach.

Lexile: 850L; 590L
Other Focus Areas: Engineering, Geometry
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Garrett Renton grew up near the seashore in Howell, New Jersey. He spent many summer days swimming in the ocean and relaxing on the sand. To Garrett, the beach had always been there, and it always would be.

Now Garrett sees this isn’t the case. The beach he loves is changing, like many others around the world. Climate change is causing sea levels to rise. The higher waters sweep away sand from beaches.

“The beach used to be so much bigger,” he says. “Now the water has crept up so much there’s hardly any space.” For the past three years, Garrett has been trying to do something about this problem. He’s one of many people working to protect the beaches they love against the rising waters.

Garrett Renton grew up near the seashore. He lived in Howell, New Jersey. He spent summer days swimming in the ocean. He also relaxed on the sand. To Garrett, the beach had always been there. And it always would be.

Now Garrett sees this isn’t the case. The beach he loves is changing. So are many others around the world. Climate change is causing sea levels to rise. The higher waters sweep away sand from beaches.

“The beach used to be so much bigger,” says Garrett. “Now the water has crept up so much there’s hardly any space.” He’s been trying to fix this problem for the past three years. He and others are working to protect the beaches they love from rising waters.


Washed Away

LOU RENTON

Garrett Renton, 17, volunteers to restore the beach near his home. 

Garrett is now 17 and a senior in high school. He’s also a volunteer with the American Littoral Society (ALS). Littoral means having to do with the seashore. The organization works to repair beaches along the Atlantic Coast.

Waves constantly crash onshore and rush back out to sea. The waves pick up tiny bits of sand and carry them away. This process is called erosion (see Vocab Lab). Some erosion on beaches is natural, explains Alex Modjeski. He works at the ALS on restoring coastal habitats.

Natural features like oyster reefs and sand dunes can help combat erosion (see Beach Protectors). They slow down the waves, making them less powerful. Slower, weaker waves sweep away less sand.

Garrett is now 17. He’s a senior in high school. He’s also a volunteer with the American Littoral Society (ALS). Littoral means having to do with the seashore. The group works along the Atlantic Coast. Members repair beaches.

Waves crash onshore and rush back out to sea. The waves pick up tiny bits of sand. The water carries them away. This is called erosion (see Vocab Lab). Some erosion on beaches is natural, says Alex Modjeski. He works at the ALS.

Natural features can help combat erosion (see Beach Protectors). They include oyster reefs and sand dunes. They slow down the waves. That makes them less powerful. Slower, weaker waves sweep away less sand.

People have long tried to hold back the sea and protect the land. But their attempts have had unintended effects. For centuries, people have built hard structures, such as seawalls, in the water along the shoreline. Seawalls are designed to protect land behind them from flooding during major storms, such as hurricanes. But when big waves hit the wall, they bounce off instead of slowing down. As they rush back out to sea, they drag extra sand with them, destroying the beach over time.

Between rising sea levels and erosion due to human development, beaches are in big trouble. And a shrinking shoreline isn’t just bad news for beachgoers. Many different animals, including birds, crabs, and sea turtles, need the sand to survive. Fortunately, experts like Modjeski have a plan.

People have long tried to hold back the sea. But their attempts have had drawbacks. People have built hard structures along shorelines for centuries. For example, they built seawalls in the water. Seawalls are made to protect land behind them. They keep the land from flooding during major storms like hurricanes. Big waves hit the wall. They bounce off but don’t slow down. The waves rush back out to sea. They drag extra sand with them. That destroys the beach over time.

Because of rising sea levels and erosion, beaches are in big trouble. And a shrinking shoreline isn’t just bad news for beachgoers. Many animals need the sand to survive. They include birds, crabs, and sea turtles. Luckily, experts like Modjeski have a plan.

Beach Rescue

Modjeski tries to re-create the natural features that reduce erosion. “Human-made structures can create more damage,” he says. “But nature knows how to handle these things.”

In 2022, ALS and volunteers like Garrett began work on a beach in the coastal town of Neptune, New Jersey. Years of storms and rising sea levels had worn down the shore to a narrow strip.

Workers first delivered 150 truckloads of sand to replace what had washed away. Next, the team placed nets filled with rocks and shells in the water along the shore. The nets work like an oyster reef to slow down waves. Workers also piled sand into new dunes. They planted native grasses on them. Their roots hold the sand in place.

This past summer, Garrett visited the beach again. He noticed the beach had survived the previous year’s storms with less erosion.

“I felt accomplished,” says Garrett. “Clearly it’s working, and you can already see the result.”

Modjeski tries to rebuild natural features on beaches. They reduce erosion. “Human-made structures can create more damage,” he says. “But nature knows how to handle these things.”

ALS and volunteers like Garrett began work on a beach in 2022. It was in the coastal town of Neptune, New Jersey. Years of storms and rising sea levels had worn down the shore. All that was left was a narrow strip.

Workers brought in 150 truckloads of sand. It would replace what had washed away. Then the team filled nets with rocks and shells. They placed them in the water along the shore. The nets work like an oyster reef to slow down waves. Workers also piled sand into new dunes. They planted native grasses on them. Their roots hold the sand in place.

Garrett visited the beach again this past summer. He saw that it had survived the previous year’s storms. There was less erosion.

“I felt accomplished,” says Garrett. “Clearly it’s working, and you can already see the result.”

video (1)
Activities (3) Download Answer Key
Quizzes (1)
Step-by-Step Lesson Plan

1. PREPARE TO READ (10 minutes)
Watch a video about erosion.

  • Play the first part of the “Let’s Stop Erosion!” video, pausing at 1:17. Discuss places where you and students have seen erosion, such as in a yard or park after a heavy rain. Ask: Do you think the places that experience the most erosion are likely to have plants growing on them—or are they more often bare sand or soil? (bare sand or soil) Why do you think that is? (Plant roots can help hold soil in place.)
  • Watch the rest of the video and ask students to tell what solutions to erosion they found most interesting and why. 

2. READ AND EvaluatE (20 minutes)
Read the article and support an expert’s claim with evidence.

  • Tell students they’re going to learn about solutions to beach erosion. Share the article and give students time to examine the photos on its first two pages for evidence of erosion. Discuss how the beach might have looked before so much sand had eroded. (For example, the sand wouldn’t have a steep drop into the water, and there would be a larger area of sand before the water begins.)
  • Read the article, pausing after each section to discuss the section’s main ideas. Point out that littoral is pronounced the same as literal—they are homophones, like right and write.
  • After reading, ask students to use evidence from the article to support this statement by Alex Modjeski: “Human-made structures can create more damage. But nature knows how to handle these things.” (Seawalls are a human-made structure that didn’t stop erosion. Laying bags of rocks and shells and planting native grasses are successful solutions that make use of nature.)
  • Have student pairs work together to cement their knowledge with the Quick Quiz or the My Vocab Lab activity.

3. RESPOND TO READING (30 minutes)
Investigate erosion with a hands-on activity.

  • Note: Save class time by setting up the bottles for this activity in advance. If you don’t have a funnel, you can create a cone out of paper. This activity works well as a center activity if you have limited materials.
  • Preview the Beach Bottle Erosion activity. Use the prepared bottle to demonstrate steps 2-3. Discuss how to find and measure the “beach measurement” (step 4) and then compare the descriptions of gentle waves (step 5) with strong waves (step 8). Allow students to work in pairs or groups. Reconvene to analyze their results.

Text-to-Speech