Strandmorfologi, stranderosion och stranddeposition, med en fallstudie på Tylösand sandstrand, Halland.

Detta är en Kandidat-uppsats från Lunds universitet/Geologiska institutionen

Sammanfattning: Coastal erosion is a process that characterises many of the world´s coastal areas and is a result of sedimentary fluctuations and the removal of sediments from beaches to other areas and out to sea. Today, the propensity for erosion is determined by looking at different dynamical and morphological properties of the beach and based on these, a value for coastal erosion propensity is set. Documentation of how to study landforms and coastal morphology are in some forms present in Sweden today but very limited. This includes determining whether a beach is accumulating, and there is mostly deposition, or if it is eroding, where there is a greater removal of sediment. Different conditions can be described both morphologically, by looking at waves and landforms, and mathematically. In Tylösand, I have both conducted a study of the landforms and wave morphology and made an assessment of mathematical parameters. Through this, it has been found that during the winter period 2018-2019 there has not been any significant erosion. It has also been established that Tylösand beach is in the morphological stage transverse bar and rip with small waves dominating the area. By looking at the mathematical parameters, it has been found that the shore has both reflective and dissipative properties locally. This report is a basis from which more studies of the beach can be carried out to assess the morphodynamical development, beach cycle and erosion. The report can be used as a starting point for better assessments of beaches and as a basis for a more realistic picture of the erosion situation. It can also be a template for establishing coastal morphologies both mathematically and through observations in both different coastal areas and during different periods on the same coast throughout the country and year.

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