Impacts of Coastal Development on the Shoreline Change of the Eastern Gulf of Thailand

2018 5th International Conference on Coastal and Ocean Engineering

Bidorn, B.^1,2 ; Rukvichai, C.^1

Department of Water Resources Engineering, Chulalongkorn University, Bangkok, Thailand^1

Research Unit on Technology for Oil Spill and Contamination Management, Chulalongkorn University, Bangkok, Thailand^2

关键词: Analysis system;    Coastal development;    Coastal protection;    Dynamic equilibria;    Gulf of Thailand;    Port development;    Shoreline change;    Shoreline position;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/171/1/012007/pdf
DOI  :  10.1088/1755-1315/171/1/012007

来源: IOP

【 摘 要 】

The Map Ta Phut (MTP) Port has been developed on the middle portion of the Rayong Bay, Thailand, since 1992. After the expansion of the port completed in 2002, the port has an approximately 3.5 km wide and extending 4.0 km seaward. This paper provides the assessment of the construction of the MTP Port project on the shoreline of the Rayong Bay. Historical shoreline positions were extracted from aerial photography and satellite imagery taken between 1957 and 2016 using ArcGIS version 10.4. The rates of shoreline changes pre- and post-port development were implemented using the Digital Shoreline Analysis System (DSAS). Results indicate that the Rayong Bay shoreline mostly was in dynamic equilibrium with an average rate of less than 0.5 m/y prior the construction of the MTP port. After the completion of the port, a significant shoreline accretion has continuously been found along the shoreline of about 500 m adjacent to both sides of the port. Meanwhile, the Rayong Bay shoreline had been eroded about 28 % of the total shoreline after the port completed in 1992 and increased to 30% after the port expansion in 2002. Coastal protection structures included seawalls, segment breakwater, Y-shaped groins, and jetty were applied along the receded shore. Most of those structures have successfully stabilized the shoreline, and the Rayong Bay has likely reached a new dynamic equilibrium since 2011.