Rainfall-induced shallow landslides caused by ex-Tropical Cyclone Debbie, 31st March 2017

Cogan, Jacob; Gratchev, Ivan; Wang, Gonghui

doi:10.1007/s10346-018-0982-4

Cited by 32 publications

(26 citation statements)

References 5 publications

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“…A rectangular waveform of 0.33 Hz was applied to impose the deviator stress on samples under undrained conditions. To simulate the condition of the road pavement affected by flooding in Australia [7][8][9][10][11][12], the partially saturated UGM specimens were tested under a water-logging situation. Due to the stiffness loss in the saturated upper layers such as the base layer when an extreme water-logging event occurred, a condition about the induced stress concentration in lower pavement layers should be considered.…”

Section: Testing Sequencesmentioning

confidence: 99%

“…Between November and April each year, tropical cyclones with large amounts of concentrated rainfall assault Australia and induce flooding and waterlogging to infrastructure and road closure [7,8]. The Queensland Tropical Cyclone Warning Center is impacted by five tropical cyclones on average, with 207 detected cyclones affecting the east coast since 1885 [9].…”

Section: Introductionmentioning

confidence: 99%

“…The Queensland Tropical Cyclone Warning Center is impacted by five tropical cyclones on average, with 207 detected cyclones affecting the east coast since 1885 [9]. In some tropical areas such as the southeast Queensland region, a significant strength loss and even premature failure of pavements exposed to extreme moisture infiltration and increase in base saturation may be induced with sudden rainfall [7]. Sultana et al [10] reported that most areas in eastern Australia encountered a considerable wet weather period from August to December of 2010.…”

Section: Introductionmentioning

confidence: 99%

“…Roads encountered asset damage when Queensland experienced extreme flooding in January 2011 with rainfalls between 600 and 100 mm recorded in the southeast Queensland area during December 2010 and January 2011 [10]. Moreover, in March 2017, a recent tropical cyclone, Debbie, which was the strongest tropical cyclone in the Queensland region since 2015, brought 747 mm rainfall within two days and induced significant damage in pavements due to flooding and waterlogging [7,9]. Due to the potential disruption of service and extra maintenance cost, this issue and related vulnerability evaluations are remarkable in construction design and construction policy [2,6].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Degree of Saturation (DOS) on Dynamic Behavior of Unbound Granular Materials

Sun

Ong

2021

Geosciences

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The extensive application of natural unbound granular materials (UGMs) motivates studies into the mechanical properties of alternatives such as processed crushed rocks employed commonly as base or subbase layers. The rutting and settlement generated in base and subbase layers is widely restricted in many specifications and standards. In this research, the dynamic behavior including the resilient modulus () and the plastic strain () of the crushed rocks collected from Queensland in Australia will be tested by a series of repeated load triaxial test (RLT) tests to investigate the behavior of UGMs under the fluctuation of the degree of saturation (DOS) (59%–100%). In particular, the RLT specimens were prepared in the laboratory through proper gradation under optimum moisture content (OMC) and 100% standard proctor maximum dry unit weight. Results from the RLT tests showed that UGM specimens soaked at higher DOS generated lower resilient modulus and weaker resistance to heavy traffic volumes with significant accumulation of plastic strain. The and of the tested aggregates under different cyclic deviator stresses of 425 kPa and 625 kPa approximately linearly decreased and approximately linearly increased as the DOS increased with a certain number of cycles up to 50,000, respectively.

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Section: Testing Sequencesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Degree of Saturation (DOS) on Dynamic Behavior of Unbound Granular Materials

Sun

Ong

2021

Geosciences

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“…The infiltration rate can be used to evaluate how quickly water enters the soil, and a high infiltration rate tends to greatly decrease the shear strength of the soil due to increases in the water content and pore water pressure [13][14][15][16][17]. Loess is characterized by well-developed vertical jointing and strong collapsibility, which significantly influence the infiltration process [3,18].…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Evolution of the Infiltration Characteristics of a Loess Landslide

Yang

Qiu

Pei

et al. 2020

IJGI

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Infiltration plays an important role in influencing slope stability. However, the influences of slope failure on infiltration and the evolution of infiltration over time and space remain unclear. We studied and compared the infiltration rates in undisturbed loess and disturbed loess in different years and at different sites on loess landslide bodies. The results showed that the average initial infiltration rate in a new landslide body (triggered on 11 October 2017) were dramatically higher than those in a previous landslide body (triggered on 17 September 2011) and that the infiltration rates of both landslide types were higher than the rate of undisturbed loess. The initial infiltration rate in the new landslide body sharply decreased over the 4–5 months following the landslide because of the appearance of physical crusts. Our observations indicated that the infiltration rate of the disturbed soil in a landslide evolved over time and that the infiltration rate gradually approached that of undisturbed loess. Furthermore, in the undisturbed loess, both the initial and quasi-steady infiltration rates were slightly higher in the loess than in the paleosol, and in the previous landslide body, the infiltration rate was highest in the upper part, intermediate in the middle part, and lowest in the lower part. This study can help us to better understand the evolution process of infiltration in undisturbed loess, previous landslides, and new landslides.

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Landslide Susceptibility Mapping Based on the Deep Belief Network: A Case Study in Sichuan Province, China

Wang

Han

et al. 2020

Understanding and Reducing Landslide Disaster Risk

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Rainfall-induced shallow landslides caused by ex-Tropical Cyclone Debbie, 31st March 2017

Cited by 32 publications

References 5 publications

Influence of Degree of Saturation (DOS) on Dynamic Behavior of Unbound Granular Materials

Influence of Degree of Saturation (DOS) on Dynamic Behavior of Unbound Granular Materials

Spatial and Temporal Evolution of the Infiltration Characteristics of a Loess Landslide

Landslide Susceptibility Mapping Based on the Deep Belief Network: A Case Study in Sichuan Province, China

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