The influence of shallow landslides on sediment supply: A flume-based investigation using sandy soil

Acharya, G.; Cochrane, Thomas A.; Davies, Tim; Bowman, Elisabeth T.

doi:10.1016/j.enggeo.2009.06.008

Cited by 50 publications

(32 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, Eckersley (1990) and Iverson et al (2000) conducted large-scale experiments to quantify the importance of the initial placement (initial void ratio) and drainage conditions, whereas Sassa (2001, 2003) and Olivares and Damiano (2007) triggered a number of shallow landslides in sandy soils using a small flume, demonstrating how the failure mode and the pore water pressure generation (during and immediately after slope failure) depend not only on the initial density but also, greatly, on the grain size and fine particle content, which can have a significant impact also on the mobility of rainfall-induced landslides. Using the same techniques, other authors focused on different aspects related to shallow landslide initiation, like the effect of soil depth on failure mode and sediment discharge (Acharya et al 2009) or the pore water pressure generation at the interface of layers of different permeability (Lourenco et al 2006).…”

Section: Introductionmentioning

confidence: 98%

Physical and numerical modelling of shallow landslides

2015

View full text Add to dashboard Cite

Physical modelling is an extremely useful tool for the study of the triggering process of shallow landslides. For this reason, in this work, numerous laboratory tests have been performed using a specific flume test apparatus. A wide range of initial soil conditions (i.e. porosity and water content) has been investigated to analyze the induced effect on failure time and mode, even simulating the presence of preferential flow directions within the soil. Different tests have been performed also reproducing, on a laboratory scale, the landslide event occurred on October 1, 2009, in the area where the testing material was sampled (i.e. Giampilieri, north-eastern Sicily, Italy). Furthermore, the experimental results have been employed to verify the capability of shallow landslide instability prediction (SLIP), a simplified stability model for the prediction of shallow landslide occurrence, to reproduce the triggering process.

show abstract

Section: Introductionmentioning

confidence: 98%

Physical and numerical modelling of shallow landslides

2015

View full text Add to dashboard Cite

show abstract

“…Iverson (1997) proposed that the pore water pressure is an important index in the landsliding process, and the landsliding of the hillslope occurs at the period with the rapidly increasing pore water pressure. Acharya et al 2009 also proposes that the hillslope slid as the degree of water saturation in the soil over 26 % based on his rainfall-induced landslide experiments. The process in the rainfall-or groundwater-induced landslide due to the soil water excess saturation includes liquefaction in the hillslope toe, and cracks in the surface of the hillslope and the following fluidized landslide (Okura et al 2002) or landslide-triggered debris flow (Sassa 1997).…”

Section: Settings and Procedures Of The Groundwater-induced Landslide mentioning

confidence: 98%

“…Many researches (Okura et al 2002;Ochiai et al 2004;Moriwaki et al 2004;Acharya et al 2009) discuss the process and mechanism of rainfall-induced landslide, but few paper (Eckersley 1990) discuss about that of groundwater-induced landslide. Iverson (1997) proposed that the pore water pressure is an important index in the landsliding process, and the landsliding of the hillslope occurs at the period with the rapidly increasing pore water pressure.…”

Section: Settings and Procedures Of The Groundwater-induced Landslide mentioning

confidence: 98%

Analysis of the Landslide Mechanic Based on the Groundwater-Induced Landslide Flume Experiments

Chen

Chunhung

Chen

2015

Engineering Geology for Society and Territory - Volume 2

View full text Add to dashboard Cite

Few researches discuss about the mechanism of groundwater-induces landslide, especially the distribution of cracks on the hillslope and the water saturation degree of the soil layer. The research explains the relationship between the distribution of cracks on the hillslope before the landslide occurred and the water saturation degree of the soil layer which was measured on the bottom of the soil layer by proceeding the 14 landslide flume experiments, including 11 freeend experiments and 3 non-free-end experiments. In the free-end landslide experiments, the liquefaction in the hillslope toe which starts the landslide processes is an important landslide process. But in the non-free-end experiments, the block which has been setup in the toe of hillslope stops or reduces the liquefaction in the hillslope toe, and also slows down the occurrence time of landslide. 2010), the landslide is a fast-moving dip-slope landslide with the average landslide depth of 15-20 m, the total landslide area of 1.42 ha, and the total landslide volume of around 2.2 × 105 m 3 . The landslide case was considered as a groundwater-induced landslide on a hillslope with the stratum of the alternations of sandstone and shale, because there is no earthquake event with the magnitude over 3.0 occurred within one month and no heavy rainfall event with the accumulated daily rainfall over 30 mm or the maximum hourly rainfall intensity over 5 mm/hr within one week before the landslide occurred. The large and deep groundwater-induced also aroused researchers' attraction for the groundwater-induced landslide. For the groundwaterinduced landslide cases, the cracks will appear on the hillslope before the groundwater-induced landslide occurs. But few researches discuss about the distribution and appearing time of cracks on the hillslope or the relationship between the distribution of cracks and the water saturation degree of the soil on the hillslope. The research focuses on the relationship between the distribution of cracks and the water saturation degree of the soil which was measured on the bottom of the soil layer by proceeding the groundwaterinduced landslide flume tests.

show abstract

“…Shallow landslides can be significant sources of sediment in hilly catchments, and may in turn act as a major control on the occurrence of debris flow in rivers (Selby, 1993;Istanbulluoglu et al, 2004;Schwab et al, 2008;Lin et al, 2011). Several studies have tended to exploit the influence of shallow landslides on sediment supply or to develop appropriate models for determining sediment yield arising from shallow landsliding (Allen and Hovius, 1998;Burton and Bathurst, 1998;Bathurst et al, 2006;Schuerch et al, 2006;Claessens et al, 2007;Acharya et al, 2009Acharya et al, , 2011. They all recognized that landslides play an important role in determining the sediment yield of hilly catchments, and the development of shallow landslide sediment yield models is still in the stage of infancy as compared with the soil erosion models.…”

Section: Introductionmentioning

confidence: 99%

Using an integrated method to estimate watershed sediment yield during heavy rain period: a case study in Hualien County, Taiwan

Hsu¹,

Wen²,

Chen³

et al. 2012

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract.A comprehensive approach estimating sediment yield from a watershed is needed to develop better measures for mitigating sediment disasters and assessing downstream impacts. In the present study, an attempt has been made to develop an integrated method, considering sediment supplies associated with soil erosion, shallow landslide and debris flow to estimate sediment yield from a debris-flow-prone watershed on a storm event basis. The integrated method is based on the HSPF and TRIGRS models for predicting soil erosion and shallow landslide sediment yield, and the FLO-2D model for calculating debris flow sediment yield. The proposed method was applied to potential debris-flow watersheds located in the Sioulin Township of Hualien County. The available data such as hourly rainfall data, historical streamflow and sediment records as well as event-based landslide inventory maps have been used for model calibration and validation. Results for simulating sediment yield have been confirmed by comparisons of observed data from several typhoon events. The verified method employed a 24-h design hyetograph with the 100-yr return period to simulate sediment yield within the study area. The results revealed that the influence of shallow landslides on sediment supply as compared with soil erosion was significant. The estimate of landslide transport capacity into a main channel indicated the sediment delivery ratio on a typhoon event basis was approximately 38.4 %. In addition, a comparison of sediment yields computed from occurrence and non-occurrence of debris flow scenarios showed that the sediment yield from an occurrence condition was found to be increasing at about 14.2 times more than estimated under a non-occurrence condition. This implied watershed sediment hazard induced by debris flow may cause severe consequences.

show abstract

The influence of shallow landslides on sediment supply: A flume-based investigation using sandy soil

Cited by 50 publications

References 38 publications

Physical and numerical modelling of shallow landslides

Physical and numerical modelling of shallow landslides

Analysis of the Landslide Mechanic Based on the Groundwater-Induced Landslide Flume Experiments

Using an integrated method to estimate watershed sediment yield during heavy rain period: a case study in Hualien County, Taiwan

Contact Info

Product

Resources

About