Cover Image

Geophysical characterization of a sinkhole region : a study toward understanding geohazards in the karst geosites

The outstanding geosites in Satun UNESCO Global Geopark, Thailand are mainly karst topography. Sinkhole which is originated from the dissolution of karst rocks by groundwater or acidic rainwater is one of the potential natural disasters in these geosites. To gain the confident among geotourism, dete...

Full description

Saved in:
Bibliographic Details
Main Author: Sawasdee Yordkayhun,
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2021
Online Access:http://journalarticle.ukm.my/17550/1/4.pdf
http://journalarticle.ukm.my/17550/
https://www.ukm.my/jsm/malay_journals/jilid50bil7_2021/KandunganJilid50Bil7_2021.html
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-ukm.journal.17550
record_format eprints
spelling my-ukm.journal.175502021-11-15T01:32:11Z http://journalarticle.ukm.my/17550/ Geophysical characterization of a sinkhole region : a study toward understanding geohazards in the karst geosites Sawasdee Yordkayhun, The outstanding geosites in Satun UNESCO Global Geopark, Thailand are mainly karst topography. Sinkhole which is originated from the dissolution of karst rocks by groundwater or acidic rainwater is one of the potential natural disasters in these geosites. To gain the confident among geotourism, detecting karst features, cavities and surficial dissolution is crucial in risk assessment and sustainable geopark management. As a part of geohazard assessment, non-invasive geophysical methods were applied for detecting near-surface defects and karst features. In this study, electrical resistivity tomography (ERT), seismic tomography and multichannel analysis of surface waves (MASW) have been integrated to understand the mechanism of an existing sinkhole formation in Satun Geopark region. ERT appeared to be an effective approach to investigate the cavity development at shallow subsurface. MASW and seismic tomography were combined to help constrain the interpretation of lithology and karst features in vicinity of the sinkhole. The results indicated that the sinkhole occurrence in this area was probably developed by forming of cavity due to an increased dissolution of the fractured limestone bedrock. This carbonate layer is in contact with the overlying groundwater and weathering shale or cohesive soil layer. The changing of water table and infiltration of surface water by heavy rainfall allowed for a sudden vertical downward of overlying sediments into the empty voids, leading to the sinkhole hazard. Penerbit Universiti Kebangsaan Malaysia 2021-07 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/17550/1/4.pdf Sawasdee Yordkayhun, (2021) Geophysical characterization of a sinkhole region : a study toward understanding geohazards in the karst geosites. Sains Malaysiana, 50 (7). pp. 1871-1884. ISSN 0126-6039 https://www.ukm.my/jsm/malay_journals/jilid50bil7_2021/KandunganJilid50Bil7_2021.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 The outstanding geosites in Satun UNESCO Global Geopark, Thailand are mainly karst topography. Sinkhole which is originated from the dissolution of karst rocks by groundwater or acidic rainwater is one of the potential natural disasters in these geosites. To gain the confident among geotourism, detecting karst features, cavities and surficial dissolution is crucial in risk assessment and sustainable geopark management. As a part of geohazard assessment, non-invasive geophysical methods were applied for detecting near-surface defects and karst features. In this study, electrical resistivity tomography (ERT), seismic tomography and multichannel analysis of surface waves (MASW) have been integrated to understand the mechanism of an existing sinkhole formation in Satun Geopark region. ERT appeared to be an effective approach to investigate the cavity development at shallow subsurface. MASW and seismic tomography were combined to help constrain the interpretation of lithology and karst features in vicinity of the sinkhole. The results indicated that the sinkhole occurrence in this area was probably developed by forming of cavity due to an increased dissolution of the fractured limestone bedrock. This carbonate layer is in contact with the overlying groundwater and weathering shale or cohesive soil layer. The changing of water table and infiltration of surface water by heavy rainfall allowed for a sudden vertical downward of overlying sediments into the empty voids, leading to the sinkhole hazard.
format Article
author Sawasdee Yordkayhun,
spellingShingle Sawasdee Yordkayhun,
Geophysical characterization of a sinkhole region : a study toward understanding geohazards in the karst geosites
author_facet Sawasdee Yordkayhun,
author_sort Sawasdee Yordkayhun,
title Geophysical characterization of a sinkhole region : a study toward understanding geohazards in the karst geosites
title_short Geophysical characterization of a sinkhole region : a study toward understanding geohazards in the karst geosites
title_full Geophysical characterization of a sinkhole region : a study toward understanding geohazards in the karst geosites
title_fullStr Geophysical characterization of a sinkhole region : a study toward understanding geohazards in the karst geosites
title_full_unstemmed Geophysical characterization of a sinkhole region : a study toward understanding geohazards in the karst geosites
title_sort geophysical characterization of a sinkhole region : a study toward understanding geohazards in the karst geosites
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2021
url http://journalarticle.ukm.my/17550/1/4.pdf
http://journalarticle.ukm.my/17550/
https://www.ukm.my/jsm/malay_journals/jilid50bil7_2021/KandunganJilid50Bil7_2021.html
_version_ 1717094735282176000
score 13.211869

Similar Items