Earth Sciences 1022A/B Lecture Notes - Lecture 11: Beach Nourishment, Baymouth Bar, Wave-Cut Platform
7 Mar 2018
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Earth sciences 1022b lecture brief 22 mar 16. Waves: from wind blowing over the ocean; a surface waveform of energy moves through the water whose molecules move side to side and up and down. Sand movement on the beach: waves bend as they approach an irregular shoreline (wave refraction) so that erosion focuses on headlands, deposition occurs in bays. Many coastlines start out with an irregular shape as a series of headlands and bays but continued cliff retreat and sand deposition tend to straighten out the shoreline. Stabilizing the shoreline: erosion can be fast, damaging during storms . Beach nourishment can be attempted but requires a lot of sand, very expensive, only lasts several years and requires continual maintenance and more sand and money.
