Year: 2009
Type: dissertation
Abstract: Groins are old and intuitive means of reducing erosion and are found along the coast worldwide, although according to CEM (Coastal Engineering Manual 2003), “they are probably the most misused and improperly designed of all coastal structures”. The original purpose of groins was to reduce local erosion, that is, to hold the width of beach in their vicinities. Despite the simplicity of groins, their interaction with the beach is complex, and existing functional design guidance is limited. On the other hand, over the past decade there have been significant advances in understanding of coastal sediment processes, predictive modeling capability, and field measurements. Therefore, with the existing numerical tools the current study will be conducted in order to achieve better insight into this specific topic, to find some design criteria for normal groins and T-shape groins. The first step in this research is to do a wide literature review to find some reliable data regarding wave height and current velocities in a groin field. An irregular wave field must be studied, since regular wave fields concentrate energy around a single frequency, so they produce exaggerated offshore bar and strong rip currents (Hulsbergen et al 1978). On the other hand, the abilities of Delft3D numerical model must be validated for modeling currents and morphological interaction of littoral zone and structures for the case. Once we comprehend the current models are capable of modeling different phenomena, a sensitivity analysis will be carried out to find some design rules for these structures.
Author: S. Eslami Arab
Language: English
Topic: Coastal and Marine Dynamics
Subfield: Earth-Surface Processes
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: green
Funder: Australian Research Council
OpenAlex ID: W32225319