With sea levels rising fast, beaches are slowly disappearing as coastal erosion increases due to climate change.
Casuarina Coastal Reserve erosion. Geoff Whalan. CC BY-NC-ND 2.0
As global warming increases and sea levels continue to rise, coastal erosion is becoming more and more of a problem. There are plenty of environmental issues that stem from this problem, like disappearing beaches and natural habitats. Coastal erosion is when rocks, soil, and sand are swept away and disappear because of rising sea levels and strong waves. The erosion of natural features like rocks is a normal part of nature, but global warming and coastal erosion is accelerating that process.
Every country with a coast is already facing this problem, and one country that is really struggling is Australia. Many homes are close enough to the beach, beyond just the people who have second homes there. There are around 700,000 Australians who live either within three kilometers (1.86 miles) of the coast or less than five meters (196.85 inches) above sea level. The country itself has over 30,000 kilometers (18,641 miles) of coastline, and all of it is being affected by this problem. With coastal erosion, the land is being eroded away by the ocean. It can be hard to measure exactly how much land is disappearing, especially since it varies from area to area, but the loss of land can only have negative consequences.
The impact of coastal erosion on human society goes beyond just destroying homes. It could affect the housing market, especially those near the coast. Millions of dollars could be lost from this as people are forced to relocate more inland in order to avoid the rising sea levels. Currently, there are still many people either willing to take the risk of losing their homes to coastal erosion or unaware of the problem, because there are still plenty of people who want to buy a seaside house.
Maslin Beach, Australia. Rene Kisselbach. CC BY-NC-ND 2.0.
The most common solution is to simply replace the sand disappearing beneath the water. The disappearing sand often gets collected nearby, and it is typically the cheapest option to just add more sand to the vanishing beach. However, this is only a temporary solution as replacing the sand doesn’t fix the problem. The rising sea levels will continue to eat away at the coastlines, regardless of whether or not the sand gets replaced. Additionally, it can be harmful to the environment from which the sand was taken. Rock walls are another possible solution, one that is more of a long term solution than replacing sand. These are designed to contain the sand and stop it from being washed away. They act as a buffer against erosion and can reduce the impact from waves, but they can be very dangerous for people. Wet rock is, of course, incredibly slippery and hazardous for the public, and since the rocks have to be of a specific quality and size, it can be more expensive than replacing sand, as well as detrimental to the environment the rocks came from. The third method to prevent coastal erosion is the use of containers known as geotextile sand containers. Essentially, these are sand bags and placing them beneath the sand on beaches can help in a similar manner as building a rock wall. There is no perfect solution to coastal erosion other than preventing global warming and rising sea levels altogether, but Australia has been taking preventative measures and reducing the impact as much as they can.
Katherine Lim
Katherine Lim is an undergraduate student at Vassar College studying English literature and Italian. She loves both reading and writing, and she hopes to pursue both in the future. With a passion for travel and nature, she wants to experience more of the world and everything it has to offer.