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Assessment of immediate and five-year earthquake impacts on river systems in sabah, Malaysia using multi-temporal satellite imageries

Earthquake is one of the most destructive natural disasters, which cause immediate and long-term changes to the river systems. This research aimed to examine the immediate and five-year impacts of the 2015 Ranau Earthquake (6.0 Mw) on river systems in Malaysian state of Sabah, a region of low earthq...

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Main Authors: Lee Ting Chai,, Anand Nainar, Rodeano Roslee, wilson vun Chiong wong, Mui-How Phua
Format: Article
Language:English
English
Published: Research Square 2023
Subjects:
TA1-2040 Engineering (General). Civil engineering (General)
TA630-695 Structural engineering (General)
Online Access:https://eprints.ums.edu.my/id/eprint/41947/1/ABSTRACT.pdf
https://eprints.ums.edu.my/id/eprint/41947/2/FULL%20TEXT.pdf
https://eprints.ums.edu.my/id/eprint/41947/
https://doi.org/10.21203/rs.3.rs-3178463/v1
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spelling my.ums.eprints.419472024-11-19T07:48:01Z https://eprints.ums.edu.my/id/eprint/41947/ Assessment of immediate and five-year earthquake impacts on river systems in sabah, Malaysia using multi-temporal satellite imageries Lee Ting Chai, Anand Nainar Rodeano Roslee wilson vun Chiong wong Mui-How Phua TA1-2040 Engineering (General). Civil engineering (General) TA630-695 Structural engineering (General) Earthquake is one of the most destructive natural disasters, which cause immediate and long-term changes to the river systems. This research aimed to examine the immediate and five-year impacts of the 2015 Ranau Earthquake (6.0 Mw) on river systems in Malaysian state of Sabah, a region of low earthquake hazard. We used object-based classification on Landsat 8 (2014 and 2015) and Sentinel-2A (2020) satellite imageries to derive land cover time series for investigating the impacts on the riparian areas. The earthquake removed vegetation in the riparian zones of four rivers, the highest being the Penataran River (69.21 ha). During the immediate impact period (2014-2015), river bar formation occurred in all rivers, with the largest increase occurring in the Kadamaian River (56.97 ha), followed by the Panataran River (54.36 ha), which had no river bar before the earthquake. The river bar of the Kadamaian River continued to increase, whereas the river bar of the Panataran River decreased five years after the earthquake. Land cover transition analysis revealed that 78.39 ha of vegetation, barren land, and river water areas changed to river bars in the Kadamaian riparian area during the immediate impact period. Except for 26.87 percent of river bars in the Kadamaian riparian area in 2015, most river bars transitioned to other land cover types five years later. During the period of immediate impact, 22.05 ha of vegetation and 10.71 ha of river water were transformed into river bars along the Penataran River. Five years later, except for 16.2 ha, all river bar areas had transitioned to other cover types. Additionally, 17.7 ha of new river bars were formed. This study provides crucial data on post-earthquake land cover changes, particularly river bar formation and changes, for assessing the earthquake impacts on the river systems and supporting impact mitigation. Research Square 2023 Article NonPeerReviewed text en https://eprints.ums.edu.my/id/eprint/41947/1/ABSTRACT.pdf text en https://eprints.ums.edu.my/id/eprint/41947/2/FULL%20TEXT.pdf Lee Ting Chai, and Anand Nainar and Rodeano Roslee and wilson vun Chiong wong and Mui-How Phua (2023) Assessment of immediate and five-year earthquake impacts on river systems in sabah, Malaysia using multi-temporal satellite imageries. Research Square. pp. 1-23. ISSN 2693-5015 https://doi.org/10.21203/rs.3.rs-3178463/v1
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
English
topic TA1-2040 Engineering (General). Civil engineering (General)
TA630-695 Structural engineering (General)
spellingShingle TA1-2040 Engineering (General). Civil engineering (General)
TA630-695 Structural engineering (General)
Lee Ting Chai,
Anand Nainar
Rodeano Roslee
wilson vun Chiong wong
Mui-How Phua
Assessment of immediate and five-year earthquake impacts on river systems in sabah, Malaysia using multi-temporal satellite imageries
description Earthquake is one of the most destructive natural disasters, which cause immediate and long-term changes to the river systems. This research aimed to examine the immediate and five-year impacts of the 2015 Ranau Earthquake (6.0 Mw) on river systems in Malaysian state of Sabah, a region of low earthquake hazard. We used object-based classification on Landsat 8 (2014 and 2015) and Sentinel-2A (2020) satellite imageries to derive land cover time series for investigating the impacts on the riparian areas. The earthquake removed vegetation in the riparian zones of four rivers, the highest being the Penataran River (69.21 ha). During the immediate impact period (2014-2015), river bar formation occurred in all rivers, with the largest increase occurring in the Kadamaian River (56.97 ha), followed by the Panataran River (54.36 ha), which had no river bar before the earthquake. The river bar of the Kadamaian River continued to increase, whereas the river bar of the Panataran River decreased five years after the earthquake. Land cover transition analysis revealed that 78.39 ha of vegetation, barren land, and river water areas changed to river bars in the Kadamaian riparian area during the immediate impact period. Except for 26.87 percent of river bars in the Kadamaian riparian area in 2015, most river bars transitioned to other land cover types five years later. During the period of immediate impact, 22.05 ha of vegetation and 10.71 ha of river water were transformed into river bars along the Penataran River. Five years later, except for 16.2 ha, all river bar areas had transitioned to other cover types. Additionally, 17.7 ha of new river bars were formed. This study provides crucial data on post-earthquake land cover changes, particularly river bar formation and changes, for assessing the earthquake impacts on the river systems and supporting impact mitigation.
format Article
author Lee Ting Chai,
Anand Nainar
Rodeano Roslee
wilson vun Chiong wong
Mui-How Phua
author_facet Lee Ting Chai,
Anand Nainar
Rodeano Roslee
wilson vun Chiong wong
Mui-How Phua
author_sort Lee Ting Chai,
title Assessment of immediate and five-year earthquake impacts on river systems in sabah, Malaysia using multi-temporal satellite imageries
title_short Assessment of immediate and five-year earthquake impacts on river systems in sabah, Malaysia using multi-temporal satellite imageries
title_full Assessment of immediate and five-year earthquake impacts on river systems in sabah, Malaysia using multi-temporal satellite imageries
title_fullStr Assessment of immediate and five-year earthquake impacts on river systems in sabah, Malaysia using multi-temporal satellite imageries
title_full_unstemmed Assessment of immediate and five-year earthquake impacts on river systems in sabah, Malaysia using multi-temporal satellite imageries
title_sort assessment of immediate and five-year earthquake impacts on river systems in sabah, malaysia using multi-temporal satellite imageries
publisher Research Square
publishDate 2023
url https://eprints.ums.edu.my/id/eprint/41947/1/ABSTRACT.pdf
https://eprints.ums.edu.my/id/eprint/41947/2/FULL%20TEXT.pdf
https://eprints.ums.edu.my/id/eprint/41947/
https://doi.org/10.21203/rs.3.rs-3178463/v1
_version_ 1817843829480357888
score 13.223943

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