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Rainfall threshold to trigger landslides in unsaturated soils: A laboratory model study
Date
2017-09-22
Author
Ahmadi-adli, Mohammad
Huvaj Sarıhan, Nejan
Toker, Nabi Kartal
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Rainfall triggered landslides are common natural hazards with significant consequences all over the world. In this study, laboratory model tests are conducted which aims to obtain the rainfall intensity-duration threshold to trigger landslides in a slope composed of unsaturated soil in a flume setup. Sixteen laboratory model tests are conducted to obtain the rainfall intensityduration threshold. Some of the conclusions in this study are: (1) rainfall intensity-duration (I-D) thresholds that would trigger a landslide can be obtained physically in the laboratory, (2) the shape of the I-D threshold plot is demonstrated to be a partly-linear relation in log-log plot for the soil used in this study, (3) below a certain rainfall intensity (15 mm/hour in this study) landslides are not triggered in unsaturated soil used in this study, (4) it is observed that shallow landslides are not triggered by any rainfall when the soil is dense.
Subject Keywords
Rainfall triggered landslides
,
Unsaturated soils
,
Infiltration
,
Slope stability
URI
https://www.issmge.org/uploads/publications/1/45/06-technical-committee-28-jtc1-01.pdf
https://hdl.handle.net/11511/76052
Conference Name
19th International Conference on Soil Mechanics and Geotechnical Engineering (17-22 Sept.2017)
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Unverified, Conference / Seminar
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Rainfall-triggered landslides in an unsaturated soil: a laboratory flume study
Ahmadi-Adli, Mohammad; Huvaj Sarıhan, Nejan; Toker, Nabi Kartal (2017-11-01)
Extreme and/or prolonged rainfall events frequently cause landslides in many parts of the world. In this study, infiltration of rainfall into an unsaturated soil slope and triggering of landslides is studied through laboratory model (flume) tests, with the goal of obtaining the triggering rainfall intensity-duration (I-D) threshold. Flume tests with fine sand at two different relative densities (34 and 48%) and at slope angle of 56.5 degrees are prepared, and rainfall (intensity in the range of 18 to 64 mm/...
Shallow landslides triggered by rainfall in nsaturated soils
Ahmadi-Adli, Mohammad; Huvaj Sarıhan, Nejan; Toker, Nabi Kartal; Department of Civil Engineering (2014)
Rainfall triggered landslides are common natural hazards with significant consequences all over the world, including Turkey. Majority of available methods for predicting rainfall-induced slope instability are based on regional statistical data of past slope failures and rainfall records rather than a physically-based model that takes the mechanism of the problem into account. Current study aims to define a numerical model for typical slopes in the region (Northern Turkey), use unsaturated soil properties an...
Numerical simulation of infiltration and evaporation for unsaturated infinite soil slopes
Kenanoğlu, Melih Birhan; Toker, Nabi Kartal; Huvaj Sarıhan, Nejan; Department of Civil Engineering (2017)
Rainfall triggered landslides are common threat in many regions of the world and cause loss of lives and properties. These are shallow failures (typically 3-5 m depths from the ground surface) that occur along a plane parallel to the ground surface where the groundwater level is located at significant depths below, and they are triggered after a heavy rainfall in a short time or after days of lower intensity rainfall (Huvaj et al., 2013). Considering a failure plane oriented parallel to the ground surface, ...
Yağmurla Tetiklenen Heyelanların Önceden Tahmini: Bir Laboratuvar Model Çalışması
Ahmadi-adli, Mohammad; Huvaj Sarıhan, Nejan; Toker, Nabi Kartal (null; 2015-11-26)
Rainfall triggered landslides are common natural hazards with significant consequences all over the world, including Turkey. Available methods for predicting rainfall-induced slope instability are based on regional statistical data of past slope failures and rainfall records rather than a physically-based model that takes the mechanism of the problem into account. Current study aims to predict rainfall triggered landslides in a laboratory model study, by obtaining rainfall intensity-duration (I-D) threshold...
Geotechnical characterization of soils prone to rainfall-induced landslides in Rize (Northern Turkey)
Üyetürk, Celal Emre; Huvaj Sarıhan, Nejan; Department of Civil Engineering (2019)
Landslides are common type of natural hazards around the world. Every year, hundreds of landslides are induced by rainfall in Rize. These landslides are shallow failures, generally having a maximum depth of 5 m. Although many of these landslides are observed every year, there is limited data on characteristics of these soils in the literature. Characterizing these soils is of paramount importance for numerical modeling of the landslide mechanisms, for landslide susceptibility mapping and for establishing ra...
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M. Ahmadi-adli, N. Huvaj Sarıhan, and N. K. Toker, “Rainfall threshold to trigger landslides in unsaturated soils: A laboratory model study,” presented at the 19th International Conference on Soil Mechanics and Geotechnical Engineering (17-22 Sept.2017), Seoul, South Korea, 2017, Accessed: 00, 2021. [Online]. Available: https://www.issmge.org/uploads/publications/1/45/06-technical-committee-28-jtc1-01.pdf.