Effectiveness of siphon drainage method for landslide stabilization in a tropical volcanic hillslope: a case study of Cibitung Landslide, West Java, Indonesia

Adrin Tohari, Sunarya Wibawa, Keigo Koizumi, Kazuhiro Oda, Mitsuru Komatsu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

An effort to implement a siphon drainage system requires a comprehensive knowledge of the factor affecting the performance of the drainage system to reduce the groundwater table in the landslide area. A long-term field experiment was conducted to evaluate the effectiveness of the siphon drainage system with vertical wells to maintain the stability of landslide masses in a volcanic hillslope in West Java. The groundwater levels in all wells and water discharged from each well were monitored and measured periodically. Results of a 1-year measurement of the groundwater level indicate that the siphon drainage system was generally effective in decreasing the groundwater level in the landslide masses to a maximum depth of 7 m with a maximum total drainage flow of 24 m3/day. The implemented siphon drainage system was also able to prevent the groundwater level from rising during a rainfall period. A series of slope stability analyses under a steady-unsteady state seepage condition indicates the siphon drainage increased the long-term stability of the landslide area significantly. Based on this study, factors affecting the effectiveness of long-term siphon drainage performance are thoroughly evaluated.

Original languageEnglish
Pages (from-to)2101-2116
Number of pages16
JournalBulletin of Engineering Geology and the Environment
Volume80
Issue number3
DOIs
Publication statusPublished - Mar 2021

Keywords

  • Field experiment
  • Groundwater
  • Landslide
  • Siphon drainage
  • Volcanic Hillslope

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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