Meteorological Factors Influencing Coastal Flooding in Semarang, Central Java, Indonesia, on 23 May 2022

Teguh Harjana*, Eddy Hermawan, Risyanto, Anis Purwaningsih, Dita Fatria Andarini, Ainur Ridho, Dian Nur Ratri, Akas Pinaringan Sujalu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademicpeer-review

2 Citations (Scopus)

Abstract

It has been well established that coastal flooding is caused by heavy rains, storm surges, and high tidal waves that potentially lead to tremendous damage. Using brightness temperature (TBB) data from the Himawari satellite and ocean surface wind data from ERA5, we have investigated meteorological factors influencing strong wind and increased seawater level over the northern coast of Semarang which caused the coastal flood on 23 May 2022. Our results indicated that there are two potential meteorological factors that contribute to the coastal flooding during that period. Firstly, the formation of MCS over the ocean on the northern coast of Semarang led to heavy rain over the coast and strong-surface wind speed that potentially enhances ocean tidal waves toward Semarang. Secondly, the unusually strong-surface easterly winds cause the increase in seawater level through the Ekman pumping mechanism. As for the latter, the strong easterly wind stress led to strong Ekman transport to the south of the flow (i.e., to the northern coast of Java), causing a large net transport of seawater toward this region as a result of a balance between Coriolis and turbulent (wind) drag forces. Our results provided a new perspective on the factors influencing the increased seawater level intruding into Semarang during the coastal flooding on 23 May 2022.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Radioscience, Equatorial Atmospheric Science and Environment and Humanosphere Science - INCREASE 2022
EditorsAbdul Basit, Erma Yulihastin, Sri Yudawati Cahyarini, Heru Santoso, Lilik Slamet S., Halda Aditya Belgaman, Widodo S. Pranowo
PublisherSpringer
Pages259-267
Number of pages9
ISBN (Print)9789811997679
DOIs
Publication statusPublished - 2023
Event2nd International Conference on Radioscience, Equatorial Atmospheric Science and Environment, INCREASE 2022 - Virtual, Online
Duration: 22 Nov 202223 Nov 2022

Publication series

NameSpringer Proceedings in Physics
Volume290
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Conference

Conference2nd International Conference on Radioscience, Equatorial Atmospheric Science and Environment, INCREASE 2022
CityVirtual, Online
Period22/11/2223/11/22

Fingerprint

Dive into the research topics of 'Meteorological Factors Influencing Coastal Flooding in Semarang, Central Java, Indonesia, on 23 May 2022'. Together they form a unique fingerprint.

Cite this