Modelling compound flooding: a case study from Jakarta, Indonesia

Bennett, William; Karunarathna, Harshinie; Xuan, Yunqing; Kusuma, Muhammad S.B.; Farid, Mohammad; Kuntoro, Arno A.; Rahayu, Harkunti P.; Kombaitan, Benedictus; Septiadi, Deni; Kesuma, Tri N.A.; Haigh, Richard; Amaratunga, Dilanthi

doi:10.1007/s11069-023-06001-1

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Modelling compound flooding: a case study from Jakarta, Indonesia

William Bennett

, Harshinie Karunarathna

, Yunqing Xuan

, Muhammad S.B. Kusuma, Mohammad Farid, Arno A. Kuntoro, Harkunti P. Rahayu, Benedictus Kombaitan, Deni Septiadi, Tri N.A. Kesuma, Richard Haigh, Dilanthi Amaratunga

Natural Hazards, Volume: 118

Swansea University Authors: William Bennett , Harshinie Karunarathna , Yunqing Xuan

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DOI (Published version): 10.1007/s11069-023-06001-1

Abstract

The paper investigates compound flooding from waves, sea surge and river flow in northern Jakarta, Indonesia, which is a global hotspot of flooding, by combining process-based coastal and river models. The coastal hydrodynamic modelling of Jakarta Bay in Indonesia shows that coastal storms can lead...

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Published in:	Natural Hazards
ISSN:	0921-030X 1573-0840
Published:	Springer Nature 2023
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa63374
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spelling	v2 63374 2023-05-09 Modelling compound flooding: a case study from Jakarta, Indonesia 02f99b24e395a83ca52f7b85b151b29b 0000-0002-7229-5747 William Bennett William Bennett true false 0d3d327a240d49b53c78e02b7c00e625 0000-0002-9087-3811 Harshinie Karunarathna Harshinie Karunarathna true false 3ece84458da360ff84fa95aa1c0c912b 0000-0003-2736-8625 Yunqing Xuan Yunqing Xuan true false 2023-05-09 CIVL The paper investigates compound flooding from waves, sea surge and river flow in northern Jakarta, Indonesia, which is a global hotspot of flooding, by combining process-based coastal and river models. The coastal hydrodynamic modelling of Jakarta Bay in Indonesia shows that coastal storms can lead to a substantial increase in sea water level due to wind and wave setup in the nearshore areas, including Muara Angke river inlet. The compound flood hazard from a range of flood scenarios, was simulated and analysed. The results reveal that low-lying areas around the river inlet are prone to flooding even during regular, low-intensity storm events, while rarer storms caused extensive floods. Floods were not caused by direct overwashing of sea defences but by overspill of the banks of the river inlet due to high sea water level caused by wind set up, wave setup, and sea surge obstructing the drainage of the river and elevating its water level during storms. We also found that the sea level rise combined with rapid land subsidence will inundate the existing coastal flood defences during storms in future. The majority of the city will be below mean sea level by 2100. The overflow of existing coastal defences will lead to extensive flooding in northern, western, and eastern Jakarta unless the defences are upgraded to keep up with future sea level rise. Journal Article Natural Hazards 118 Springer Nature 0921-030X 1573-0840 Jakarta, Indonesia, Compound flooding, Process-based modelling, Extreme storms, Sea level rise 11 5 2023 2023-05-11 10.1007/s11069-023-06001-1 COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University SU Library paid the OA fee (TA Institutional Deal) Natural Environment Research Council (NE/S003282/1). NE/S003282/1 2023-09-04T17:31:51.5015626 2023-05-09T14:19:54.9676546 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering William Bennett 0000-0002-7229-5747 1 Harshinie Karunarathna 0000-0002-9087-3811 2 Yunqing Xuan 0000-0003-2736-8625 3 Muhammad S.B. Kusuma 4 Mohammad Farid 5 Arno A. Kuntoro 6 Harkunti P. Rahayu 7 Benedictus Kombaitan 8 Deni Septiadi 9 Tri N.A. Kesuma 10 Richard Haigh 11 Dilanthi Amaratunga 12 63374__27773__9330ba79629d4611945684f52add737e.pdf 63374.pdf 2023-06-08T15:51:02.6187971 Output 3810308 application/pdf Version of Record true Distributed under the terms of a Creative Commons Attribution 4.0 License (CC BY 4.0). true eng http://creativecommons.org/licenses/by/4.0/.
title	Modelling compound flooding: a case study from Jakarta, Indonesia
spellingShingle	Modelling compound flooding: a case study from Jakarta, Indonesia William Bennett Harshinie Karunarathna Yunqing Xuan
title_short	Modelling compound flooding: a case study from Jakarta, Indonesia
title_full	Modelling compound flooding: a case study from Jakarta, Indonesia
title_fullStr	Modelling compound flooding: a case study from Jakarta, Indonesia
title_full_unstemmed	Modelling compound flooding: a case study from Jakarta, Indonesia
title_sort	Modelling compound flooding: a case study from Jakarta, Indonesia
author_id_str_mv	02f99b24e395a83ca52f7b85b151b29b 0d3d327a240d49b53c78e02b7c00e625 3ece84458da360ff84fa95aa1c0c912b
author_id_fullname_str_mv	02f99b24e395a83ca52f7b85b151b29b_*_William Bennett 0d3d327a240d49b53c78e02b7c00e625__Harshinie Karunarathna 3ece84458da360ff84fa95aa1c0c912b_**_Yunqing Xuan
author	William Bennett Harshinie Karunarathna Yunqing Xuan
author2	William Bennett Harshinie Karunarathna Yunqing Xuan Muhammad S.B. Kusuma Mohammad Farid Arno A. Kuntoro Harkunti P. Rahayu Benedictus Kombaitan Deni Septiadi Tri N.A. Kesuma Richard Haigh Dilanthi Amaratunga
format	Journal article
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container_volume	118
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institution	Swansea University
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doi_str_mv	10.1007/s11069-023-06001-1
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description	The paper investigates compound flooding from waves, sea surge and river flow in northern Jakarta, Indonesia, which is a global hotspot of flooding, by combining process-based coastal and river models. The coastal hydrodynamic modelling of Jakarta Bay in Indonesia shows that coastal storms can lead to a substantial increase in sea water level due to wind and wave setup in the nearshore areas, including Muara Angke river inlet. The compound flood hazard from a range of flood scenarios, was simulated and analysed. The results reveal that low-lying areas around the river inlet are prone to flooding even during regular, low-intensity storm events, while rarer storms caused extensive floods. Floods were not caused by direct overwashing of sea defences but by overspill of the banks of the river inlet due to high sea water level caused by wind set up, wave setup, and sea surge obstructing the drainage of the river and elevating its water level during storms. We also found that the sea level rise combined with rapid land subsidence will inundate the existing coastal flood defences during storms in future. The majority of the city will be below mean sea level by 2100. The overflow of existing coastal defences will lead to extensive flooding in northern, western, and eastern Jakarta unless the defences are upgraded to keep up with future sea level rise.
published_date	2023-05-11T17:31:53Z
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Modelling compound flooding: a case study from Jakarta, Indonesia

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