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composed of sand, coastal erosion creates little problem for the beach because it uses this sand to Chapter 9 Beach Erosion and Loss 3 sustain the environment. After all, sand is the lifeblood of beaches. However, migrating upward and landward through space and time does create a huge problem for buildings and roads built too close to the shoreline. And therein lies the rub â protecting the land with a seawall will lead to beach loss.
Dear EarthTalk: Iâve noticed a lot of beach erosion along the eastern U.S. coast. Beaches are virtually nonexistent in places. Is this a usual cycle that will self-correct, or are these beaches permanently gone from sea level rise or other environmental causes? -- Jan Jesse, Morristown, TN. Unfortunately for beach lovers and owners of high-priced beach-front homes, coastal erosion in any form is usually a one-way trip. Man-made techniques such as beach nourishmentâwhereby sand is dredged from off-shore sources and deposited along otherwise vanishing beachesâmay slow the process, but nothing short of global cooling or some other major geomorphic change will stop it altogether.