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Hydrogeomorphic Hazards: Modeling, Mapping, and Mitigation of Rainfall-Triggered Landslides
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Hydrogeomorphic Hazards: Modeling, Mapping, and Mitigation of Rainfall-Triggered Landslides

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

Deadline for manuscript submissions: 20 August 2026 | Viewed by 1043

Special Issue Editors

Dr. Taorui Zeng

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Guest Editor
Institute of Future Civil Engineering Science and Technology, Chongqing Jiaotong University, Chongqing, China
Interests: spatial modeling; numerical modeling; landslides; construction risk man-agemen
Special Issues, Collections and Topics in MDPI journals
Dr. Gianfranco Nicodemo

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Guest Editor
Department of Civil Engineering, University of Salerno, 84084 Fisciano, Italy
Interests: landslides; subsidence; monitoring; vulnerability; InSAR; modelling; risk analysis
Special Issues, Collections and Topics in MDPI journals
Dr. Zhilu Chang

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Guest Editor
School of Infrastructure Engineering, Nanchang University, Jiangxi, China
Interests: rainfall-induced landslide; machine learning; landslide risk assessment; fail-ure mechanism; physical-data based models; monitoring and early warning

Special Issue Information

Dear Colleagues,

Rainfall-triggered landslides pose significant hydrogeomorphic hazards, threatening communities, infrastructure, and ecosystems worldwide. This Special Issue, titled "Hydrogeomorphic Hazards: Modeling, Mapping, and Mitigation of Rainfall-Triggered Landslides," seeks to advance interdisciplinary research on the prediction, assessment, and management of these hazards. We invite contributions that explore innovative approaches in numerical and statistical modeling, high-resolution mapping techniques, and risk mitigation strategies for landslides induced by extreme or prolonged rainfall events.

The scope of this Special Issue includes, but is not limited to:

(i) Advances in physically based and data-driven landslide prediction models.

(ii) Remote sensing, GIS, and machine learning applications for landslide susceptibility and hazard mapping.

(iii) Case studies on effective mitigation measures, early warning systems, and land-use planning.

(iv) Interactions between climate change, hydrological processes, and landslide dynamics.

By compiling cutting-edge research, this Special Issue aims to bridge gaps between theoretical developments and practical solutions, fostering resilience against rainfall-induced slope failures. It will contribute to the existing literature by integrating emerging technologies, multi-scale assessments, and transdisciplinary frameworks to enhance landslide risk reduction.

We welcome original research articles, reviews, and methodological advancements from geomorphologists, hydrologists, geotechnical engineers, and disaster risk management experts.

Dr. Taorui Zeng
Dr. Gianfranco Nicodemo
Dr. Zhilu Chang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • rainfall-triggered landslides
  • hydrogeomorphic hazards
  • landslide modeling
  • hazard mapping
  • risk mitigation
  • remote sensing
  • GIS
  • early warning systems
  • climate change impacts
  • slope stability

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

23 pages, 16909 KB  
Article
Effect of Interlayer Dip Angle on the Mechanical Response of Xigeda Sandstone–Mudstone Model Slopes Under Rainfall Conditions
by Qianping Du, Lei Deng, Zitong Wang and Chen Wang
Water 2026, 18(6), 718; https://doi.org/10.3390/w18060718 - 19 Mar 2026
Viewed by 373
Abstract
The strength of Xigeda strata decreases significantly upon contact with water, and the shear strength between sandstone and mudstone layers is lower than that within the individual layers. Therefore, the interlayer dip angle plays an important role in determining the failure mode of [...] Read more.
The strength of Xigeda strata decreases significantly upon contact with water, and the shear strength between sandstone and mudstone layers is lower than that within the individual layers. Therefore, the interlayer dip angle plays an important role in determining the failure mode of rainfall-induced landslides. To investigate the effect of interlayer dip angle on the mechanical response of Xigeda sandstone–mudstone slopes under rainfall conditions, a total of five model slope tests were conducted. Different ratios of model materials were selected for the sandstone and mudstone, and artificial rainfall with intensities representative of the Panxi region was simulated using a calibrated rainfall device. A combination of photography and instrument measurements was employed to study the seepage field, deformation field, and slope failure characteristics at five interlayer dip angles. It is shown that when the interlayer dip angle is smaller than the slope angle, an increase in the interlayer dip angle accelerates the movement of the wetting front along the weak interlayer plane. At the same time, this increase shortens the time to the occurrence of abrupt displacement and increases the corresponding displacement magnitude, which makes slope failure prediction more challenging. The shoulders of all slopes experienced displacement earliest and exhibited the largest displacement amplitude. The slope failure mode transitioned from shallow surface sliding to interlayer sliding. When the interlayer dip angle surpassed the slope angle, the weak interlayer plane was no longer the dominant control surface. Slope stability was thereby moderately enhanced, with the failure mode shifting to through-layer sliding. Full article
(This article belongs to the Special Issue Hydrogeomorphic Hazards: Modeling, Mapping, and Mitigation of Rainfall-Triggered Landslides)
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17 pages, 2370 KB  
Article
Study on the Delayed Hydraulic Response and Instability Mechanism of Low-Permeability Soil Slopes Under Heavy Rainfall and Snowmelt Conditions
by Wenlong Tang, Shibo Zhao, Chuqiao Meng and Haipeng Wang
Water 2026, 18(5), 594; https://doi.org/10.3390/w18050594 - 28 Feb 2026
Viewed by 331
Abstract
Rain-on-snow events in cold regions frequently trigger slope failures. This study elucidates the instability mechanism of low-permeability silty clay slopes under combined rainfall and snowmelt conditions. A refined numerical model was established based on the sequential coupling of SEEP/W and SLOPE/W, utilizing the [...] Read more.
Rain-on-snow events in cold regions frequently trigger slope failures. This study elucidates the instability mechanism of low-permeability silty clay slopes under combined rainfall and snowmelt conditions. A refined numerical model was established based on the sequential coupling of SEEP/W and SLOPE/W, utilizing the Morgenstern-Price method for stability analysis. A rigorous mesh sensitivity analysis confirmed that a locally refined mesh of 0.2 m with exponential time-stepping is essential to eliminate numerical dispersion at the wetting front. Simulation results indicate a significant time-lag effect in stability response; the critical failure time lags behind rainfall cessation (e.g., ~8 h for moderate rain) due to gravity-driven moisture redistribution. Spatially, the slope toe reaches saturation first, generating excess pore-water pressure and suggesting a tendency toward retrogressive instability. Furthermore, snowmelt superposition functions as a continuous hydraulic load, creating a base flow effect that advances the acceleration phase of failure by 1–2 h and further reduces the minimum safety factor. These findings highlight the critical role of the slope toe saturation and the necessity of considering snowmelt intensity in landslide early warning systems for cold regions. Full article
(This article belongs to the Special Issue Hydrogeomorphic Hazards: Modeling, Mapping, and Mitigation of Rainfall-Triggered Landslides)
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