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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.
Exploring Erosion, Sediments and Jetties. 2.1 based on 18 ratings. Ocean waves erode the coastline. The sand they remove is shifted to another location. This paradoxical effect can strip beaches in one location and create them in another. We'll observe this effect by creating a model of the shoreline. Problem: In this experiment, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.