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Microtremor analysis to identify fissure vulnerable zones in Demak, Central Java, Indonesia

Demak Regency, located in Central Java, Indonesia stands out among the regencies for its rapid development and regional growth, leading to a significant reliance on groundwater. This is thought to be caused by low precipitation and the geological characteristics of Demak Regency, which is mostly loc...

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Main Authors: Leonita, Rahmadany, Sismanto,, Marjiyono,
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2024
Online Access:http://journalarticle.ukm.my/24237/1/ST%205.pdf
http://journalarticle.ukm.my/24237/
https://www.ukm.my/jsm/english_journals/vol53num7_2024/contentsVol53num7_2024.html
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spelling my-ukm.journal.242372024-09-24T05:10:06Z http://journalarticle.ukm.my/24237/ Microtremor analysis to identify fissure vulnerable zones in Demak, Central Java, Indonesia Leonita, Rahmadany Sismanto, Marjiyono, Demak Regency, located in Central Java, Indonesia stands out among the regencies for its rapid development and regional growth, leading to a significant reliance on groundwater. This is thought to be caused by low precipitation and the geological characteristics of Demak Regency, which is mostly located on alluvial plains. To address these concerns, this study aimed to pinpoint regions vulnerable to ground fractures resulting from excessive groundwater extraction compounded by seismic activity. The research encompassed 191 locations, including 177 single station microtremor measurement points and 14 array microtremor measurement points. Single station microtremor measurements utilized the Horizontal to Vertical Spectral Ratio (HVSR) method, while array measurements employed the Spatial Autocorrelation (SPAC) method. Ground shear strain values spanning from 32.12 × 10-6 - 96.39 × 10-6. Notably, areas exhibiting heightened values are concentrated in Wonosalam Subdistrict and the Southwest of Karangtengah Subdistrict. The morphology of the bedrock within the study area tends to mirror the sedimentary layer’s thickness, reflecting relatively minimal surface height discrepancies at the measurement points. Vulnerability to fissures resulting from excessive groundwater extraction and seismic activity is concentrated on the north side of Wonosalam District, the eastern sector of Demak District, and a small section of Mijen District. Penerbit Universiti Kebangsaan Malaysia 2024 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/24237/1/ST%205.pdf Leonita, Rahmadany and Sismanto, and Marjiyono, (2024) Microtremor analysis to identify fissure vulnerable zones in Demak, Central Java, Indonesia. Sains Malaysiana, 53 (7). pp. 1533-1544. ISSN 0126-6039 https://www.ukm.my/jsm/english_journals/vol53num7_2024/contentsVol53num7_2024.html
institution Universiti Kebangsaan Malaysia
building Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description Demak Regency, located in Central Java, Indonesia stands out among the regencies for its rapid development and regional growth, leading to a significant reliance on groundwater. This is thought to be caused by low precipitation and the geological characteristics of Demak Regency, which is mostly located on alluvial plains. To address these concerns, this study aimed to pinpoint regions vulnerable to ground fractures resulting from excessive groundwater extraction compounded by seismic activity. The research encompassed 191 locations, including 177 single station microtremor measurement points and 14 array microtremor measurement points. Single station microtremor measurements utilized the Horizontal to Vertical Spectral Ratio (HVSR) method, while array measurements employed the Spatial Autocorrelation (SPAC) method. Ground shear strain values spanning from 32.12 × 10-6 - 96.39 × 10-6. Notably, areas exhibiting heightened values are concentrated in Wonosalam Subdistrict and the Southwest of Karangtengah Subdistrict. The morphology of the bedrock within the study area tends to mirror the sedimentary layer’s thickness, reflecting relatively minimal surface height discrepancies at the measurement points. Vulnerability to fissures resulting from excessive groundwater extraction and seismic activity is concentrated on the north side of Wonosalam District, the eastern sector of Demak District, and a small section of Mijen District.
format Article
author Leonita, Rahmadany
Sismanto,
Marjiyono,
spellingShingle Leonita, Rahmadany
Sismanto,
Marjiyono,
Microtremor analysis to identify fissure vulnerable zones in Demak, Central Java, Indonesia
author_facet Leonita, Rahmadany
Sismanto,
Marjiyono,
author_sort Leonita, Rahmadany
title Microtremor analysis to identify fissure vulnerable zones in Demak, Central Java, Indonesia
title_short Microtremor analysis to identify fissure vulnerable zones in Demak, Central Java, Indonesia
title_full Microtremor analysis to identify fissure vulnerable zones in Demak, Central Java, Indonesia
title_fullStr Microtremor analysis to identify fissure vulnerable zones in Demak, Central Java, Indonesia
title_full_unstemmed Microtremor analysis to identify fissure vulnerable zones in Demak, Central Java, Indonesia
title_sort microtremor analysis to identify fissure vulnerable zones in demak, central java, indonesia
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2024
url http://journalarticle.ukm.my/24237/1/ST%205.pdf
http://journalarticle.ukm.my/24237/
https://www.ukm.my/jsm/english_journals/vol53num7_2024/contentsVol53num7_2024.html
_version_ 1811683423105843200
score 13.211869

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