Characteristics of Sea Waves Condition at The Northern and Eastern of Bintan Island within Period of 2015-2019

Abstract

Abstract The objective of this research was to collect the comprehensive information about the characteristics of sea waves in the northern and eastern of Bintan Island Sea based on differentiation in oceanographic conditions between the north and east coast of Bintan Island. The north coast of Bintan Island faces the open seas directly with a potential high wave and cause several characters of coastal damage, including coastal abrasion. The characteristics of sea waves are obtained by forecasting, namely converting wind speed values using the SPM (Shore Protection Manual) method. The results of this study collected comprehensive information of sea waves on the north coast during the 2015-2019 period showed a dominant pattern with the direction of sea wave propagation from north and south, while for the eastern region the wave propagation trends prevailing from north and southeast. The maximum sea wave height in the northern of Bintan Island Sea reaches 3.32 m with a period of 8.70 s while in the eastern of Bintan Island Sea the maximum of wave height condition reaches 2.90 m with a period of 8.32 s. The maximum sea wave conditions on the north and east coasts of Bintan Island occur during the north wind season (December-February) and is directly proportional to the requirements of higher wind speeds. The minimum sea wave conditions occur during the east monsoon (March-May) where during that period the wind speeds that blow are very low condition. The results of this study indicate that wind speeds in northern Bintan Island are related to wave conditions. Our research proves that higher wind speeds form higher wave conditions.