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 language | English |
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Pages (from-to) | 2101-2116 |
Number of pages | 16 |
Journal | Bulletin of Engineering Geology and the Environment |
Volume | 80 |
Issue number | 3 |
DOIs | |
Publication status | Published - Mar 2021 |
Keywords
- Field experiment
- Groundwater
- Landslide
- Siphon drainage
- Volcanic Hillslope
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Geology