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Effect of jetties in coastal change at chumphon estuary
Author(s)
Date Issued
January 1, 2017
Type
Conference Paper
Abstract
The research on the effect of coastal facilities for protecting an estuary from channel blockage and a coast from beach erosion by waves demands to understand wave propagation, nearshore current and sediment transportation. The purpose of this research is to study theeffect of jetty and propose countermeasures to compensate insufficient safety in Chumphon estuary, Chumpon province. The field survey is executed, topographic maps, bathymetric data, wave data for storm surges, tidal data were collected and inputted in Ca's numerical model(Ca et. al., 2000). This model consists of the near shore fluid dynamicmodel based on the Boussinesq equation and the topographical change model which the bed load and the suspended load were considered. Although the jetties are very effective for channel maintenance, since diffraction waves by the jetties has drawn sand in the north-side beachof the jetties toward the jetties, serious coastal erosion has occurred in the center of this north-side beach. Moreover, according to thesimulation results by using Ca's model, in the south-side beach of thejetties, if a typhoon of Linda classes hits this area, since heavy overtopping occurs, wave dissipation facilities are necessary.
Citation
Proceedings of the International Offshore and Polar Engineering Conference, 1565-1572, 2017