Characterization of land subsidence in the Choshui River alluvial fan, Taiwan

Chih Hsi Liu*, Yii-Wen Pan, Jyh-Jong Liao, Chen Tair Huang, Shoung Ouyang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Land subsidence in Taiwan has increased rapidly over the past four decades, owing to heavy withdrawal of groundwater. Leveling surveys, layer compressions and groundwater level in individual layers were continuously monitored in the Choshui alluvial fan, western Taiwan. It was found that ground subsidence and layer compression were consistent with the variation of groundwater level. From multi-level compression monitoring, the layers with major compression deformation were identified. Clayey and sandy layers exhibited significant compression deformation. Conceptual models of compression behavior for clays and sands were studied based on the field data. The compression behavior of clays agreed with the Terzaghi consolidation theory. Notable, irrecoverable volumetric strains were also observed in sandy layers. They exhibited obvious elastoplastic mechanical behavior. The high compressibility of the sand layer in the alluvial fan was attributed to the flaky sand grains in this geological region.

Original languageEnglish
Pages (from-to)1154-1166
Number of pages13
JournalEnvironmental Geology
Volume45
Issue number8
DOIs
StatePublished - 1 Jun 2004

Keywords

  • Aquifers
  • Aquitards
  • Land subsidence
  • Taiwan

Fingerprint Dive into the research topics of 'Characterization of land subsidence in the Choshui River alluvial fan, Taiwan'. Together they form a unique fingerprint.

Cite this