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Susceptibility Assessment of Rainfall-Induced Landslides
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Susceptibility Assessment of Rainfall-Induced Landslides

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Hydrology".

Deadline for manuscript submissions: closed (10 October 2023) | Viewed by 10793

Special Issue Editors

Dr. Antonello Troncone

E-Mail Website
Guest Editor
Associate Professor, Department of Civil Engineering, University of Calabria, Via P. Bucci, Cubo 44/B, I-87036 Rende, CS, Italy
Interests: soil mechanics; numerical analysis; slope stability; landslides
Special Issues, Collections and Topics in MDPI journals
Dr. Luigi Pugliese

E-Mail Website
Guest Editor
Department of Civil Engineering, University of Calabria, Via P. Bucci, Cubo 44/B, I-87036 Rende, CS, Italy
Interests: soil mechanics; numerical analysis; slope stability; landslides

Special Issue Information

Dear Colleagues,

This Special Issue, “Susceptibility Assessment of Rainfall-Induced Landslides”, deals with a topic of great interest for many scientific and practical reasons. Landslides are globally recognized as one of the most dangerous natural disasters in terms of the safety of people, infrastructure, and economic activities. Rainfall may cause unstable conditions for slopes, and it is therefore a primary cause of landslides. For example, prolonged and extremely intense rainfall could cause catastrophic and fast movements of rock and soil masses, while a pre-existing landslide body might also be reactivated by a groundwater level increase due to rainfall. For these reasons, studying the effects of rainfall on slope stability is of paramount importance.

Papers focused on the following topics will be appreciated: rainfall-induced landslides, landslides activated by groundwater fluctuations induced by rainfall, atmosphere–soil interaction and its influence on the pore water pressure regime within slopes, and the development of new monitoring techniques and forecasting models for early warning systems. Moreover, the present Special Issue will welcome contributions concerning case histories.

Dr. Antonello Troncone
Dr. Luigi Pugliese
Guest Editors

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Keywords

  • landslides
  • slope stability
  • rain infiltration
  • groundwater level
  • analysis methods
  • monitoring

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Published Papers (3 papers)

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Research

17 pages, 4647 KiB  
Article
Soil Detachment Rate of a Rainfall-Induced Landslide Soil
by Pavithran Batumalai, Nor Shahidah Mohd Nazer, Norbert Simon, Norasiah Sulaiman, Mohd Rozi Umor and Mohamad Anuri Ghazali
Water 2023, 15(12), 2149; https://doi.org/10.3390/w15122149 - 6 Jun 2023
Cited by 8 | Viewed by 5180
Abstract
In recent decades, the number of rainfall-induced landslides has increased significantly in many parts of Malaysia, especially in the urbanized and hilly areas. The disturbance of hilly morphology as a result of human activities has increased the potential for erosion on man-made slopes, [...] Read more.
In recent decades, the number of rainfall-induced landslides has increased significantly in many parts of Malaysia, especially in the urbanized and hilly areas. The disturbance of hilly morphology as a result of human activities has increased the potential for erosion on man-made slopes, especially during extreme rainfall during rain events. Most hilly areas in Malaysia are covered by a thick layer of soil, which is known to have a significant impact on soil erosion. However, little is known about how soil erosion and rainfall could be the driving force behind landslide initiation, especially on stabilized slopes. Therefore, this study focuses on the soil detachment rate of landslides triggered by rainfall at different rainfall intensities. A sandbox model is used to represent real slope conditions. The relationship between the soil detachment capacity, soil properties (water content, slope, clay layers and soil compaction), hydraulic parameters (flow shear stress and stream power) and rainfall intensities (low, medium and high) was investigated. The results showed that the hydraulic parameters and the rainfall intensity are directly proportional to the detachment rate of the soil. Water content and slope show a higher soil detachment rate and a lower critical flow shear stress than other soil properties. It can be concluded that high saturation and steep slope increase the risk of soil erosion because the cohesion and friction of the soil are significantly reduced, leading to a weakening of the soil structure at the surface. The results of this study can feed into the existing analysis of slope stability and formulate the onset of a landslide triggered by rainfall, especially in eroded soils. Full article
(This article belongs to the Special Issue Susceptibility Assessment of Rainfall-Induced Landslides)
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17 pages, 7033 KiB  
Article
A Simplified Analytical Method to Predict Shallow Landslides Induced by Rainfall in Unsaturated Soils
by Antonello Troncone, Luigi Pugliese and Enrico Conte
Water 2022, 14(19), 3180; https://doi.org/10.3390/w14193180 - 9 Oct 2022
Cited by 7 | Viewed by 2278
Abstract
In order to assess slope stability owing to rainfall, the availability of an effective and simple-to-use methodology, relating directly rain to eventual landslide triggering, is undoubtedly useful. To this purpose, a simplified method aimed to the prediction of rainfall-induced shallow landslides in unsaturated [...] Read more.
In order to assess slope stability owing to rainfall, the availability of an effective and simple-to-use methodology, relating directly rain to eventual landslide triggering, is undoubtedly useful. To this purpose, a simplified method aimed to the prediction of rainfall-induced shallow landslides in unsaturated soils is proposed in the present study. This method takes advantage of some closed-form solutions to evaluate the change in pore pressure due to infiltration of a rainfall characterized by a given intensity and duration, and the simple scheme of infinite slope to calculate a threshold for the change in pore pressure when the slope is under limit conditions. Particularly, using the present approach, a critical curve can be defined to establish the rainfall events that can trigger a failure process at a given depth, where suction before rainfall is known. The proposed method appears promising from an engineering viewpoint, since it is simple to use and requires few parameters as input data. In addition, these parameters can be determined from conventional geotechnical tests. The validity of the proposed approach is corroborated by some comparisons with the results of well-documented case studies. Full article
(This article belongs to the Special Issue Susceptibility Assessment of Rainfall-Induced Landslides)
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11 pages, 2275 KiB  
Article
Rainfall Threshold for Shallow Landslide Triggering Due to Rising Water Table
by Antonello Troncone, Luigi Pugliese and Enrico Conte
Water 2022, 14(19), 2966; https://doi.org/10.3390/w14192966 - 21 Sep 2022
Cited by 14 | Viewed by 2658
Abstract
In the present study, a simple-to-use method is proposed for a preliminary prediction of the occurrence of shallow landslides (generally, with a thickness of 1–2 m) due to rainfall. This method can be used when a water table forms within the slope or [...] Read more.
In the present study, a simple-to-use method is proposed for a preliminary prediction of the occurrence of shallow landslides (generally, with a thickness of 1–2 m) due to rainfall. This method can be used when a water table forms within the slope or the existing groundwater level rises due to rain infiltration, resulting in an increase in the pore water pressure. A relationship is also provided to establish when these conditions occur and the method can consequently be used. The proposed method combines a simplified solution to evaluate the change in pore water pressure within the slope due to infiltration, with the simple scheme of infinite slope to calculate a critical value of the pore water pressure that determines the incipient failure condition of the slope. In this way, a threshold curve can be also determined to readily assess whether a rainfall event with expected intensity and duration is capable of causing a slope failure at a given depth, where the initial pore water pressure is known. The method is completely analytical and only requires a few parameters as input data, which in addition can be obtained from conventional tests. A well-documented case study is considered to show how the method can be used for routine applications. Full article
(This article belongs to the Special Issue Susceptibility Assessment of Rainfall-Induced Landslides)
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