Thomas Djamaluddin, Ruli Dwi Susanti, Arif Aditiya, Widodo Setiyo Pranowo, Andi Sitti Mariyam, Andi Pengerang Hasanuddin, Lesi Mareta, Iyus Edi Rusnadi
Tidal data in Jakarta and Surabaya during 1984-2004 were used to analyze the astronomical constituents that triggered coastal flooding on the north coast of Java. Empirical analysis of the relationship between peaks of sea level (peak SL) in Jakarta and Surabaya shows that in general the lunar perigee constituent equally increases the peak SL when it occurs simultaneously with the maximum declination of the moon (in Jakarta) or the new moon - full moon (in Surabaya). Another dominant constituent related to the increase in peak SL is the solar declination (semi-annual) cycle. While the nodal cycle constituent of 18.6 years did not appear to have an effect. Non-astronomical constituents, namely La Nina and Positive Indian Ocean Dipole (IOD), were shown to increase the peak SL. So, from astronomical constituents, it is necessary to watch out for the potential coastal flooding due to solar declination (semi-annual) variations in the months of November - February and May - August, especially during the new moon - full moon or the maximum moon's declination coincides with the perigee of the moon. La Nina phenomena and Positive IOD also need to be watched out for their role in increasing the potential for coastal flooding. Extreme weather can also strengthen the potential for coastal flooding. © 2023 American Institute of Physics Inc.. All rights reserved.
Research Center for Space, National Research and Innovation Agency (BRIN), Bandung, Indonesia; Geospatial Information Agency (BIG), Bogor, Indonesia; Research Center for Climate and Atmosphere, National Research and Innovation Agency (BRIN), Bandung, Indonesia; Universitas Muhammadiyah Surabaya, Surabaya, Indonesia; Department of Atmospheric and Planetary Science, Sumatera Institute of Technology (Itera), Lampung, Indonesia; National Research and Innovation Agency (BRIN), Bandung, Indonesia
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