Investigation of the effects of tide on inlet's coastal processes
2013
Karami Khaniki, Ali
Inlet is an area that fresh water is mixing with ocean salty water and it is a navigation path in coastal zones. So it is important to have enough information about currents patterns and sand transport in this area. Sand transport at inlets is determined with waves, longshore currents and tidal currents. So because of importance of determining sand transport at inlets, in this research effect of tide on sand transport at inlets is investigated. It was done by numerical and physical modelling. In the first procedures, a typical inlet was subjected to different states of tide and simulated in MIKE21 environment. According to the results of the tests, due to radiation of tidal waves to the inlet, two vortexes appeared before inlet entrance and two vortexes appeared after inlet. These vortexes trap sands at the inlet entrance and causes decomposition of sands at inlets. Then these sands will be transport before and after the inlet entrance by tidal currents at the inlet. So in this way ebb and flood shoals are created. If tidal wave height increases, the current velocity and the bed level change will increase too.
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