Analyses of the Impacts of Climate Change and Forest Fire on Cold Region Slopes Stability by Random Finite Element Method

Dong, Shaoyang; Jiang, Yusheng; Yu, Xiong

doi:10.1007/s10346-021-01637-1

Cited by 13 publications

(9 citation statements)

References 35 publications

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“…Table 2 presents the simulation's needed parameters, including the parameters of geotextile, pavement surface material, and soil layers. These parameters are found or calculated using site measured data from the LTPP database and literature [7,34,47]. The SWCC and hydraulic conductivity variation with suction of base, subgrade, and wicking geotextile are presented in Figure 3 with data from [7].…”

Section: Model Validationmentioning

confidence: 99%

“…Numerical modeling serves as an effective tool for evaluating the interacted variations of moisture, heat, and stress-strain in unfrozen and frozen soils. While several models have been proposed to investigate these coupled processes, classifiable into thermalhydro [26][27][28][29][30] models and thermal-hydro-mechanical [31][32][33][34] models, research integrating wicking geotextile within multiphysics models remains scarce [10]. This study introduces an advanced coupling model that assimilates various environmental dynamics, including meteorological, geothermal, and hydrological factors, and incorporates wicking geotextile to assess its impact on pavement under diverse environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

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A Multiphysics Simulation of the Effects of Wicking Geotextile on Mitigating Frost Heave under Cold Region Pavement

Jiang,

Alajlan,

Zapata

et al. 2024

Geosciences

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Geotextile offers numerous benefits in improving pavement performance, including drainage, barrier functionality, filtration, and reinforcement. Wicking geotextile, a novel variant in this category, possesses the intrinsic ability to drain water autonomously from soils. This paper details the development and application of a comprehensive multiphysics model that simulates the performance of wicking geotextile within a pavement system under freezing climates. The model considers the inputs of various environmental dynamics, including the impact of meteorological factors, groundwater levels, ground heat, and drainage on the pavement system. The model was firstly validated using field data from a long-term pavement performance (LTPP) road section in the cold region. It was subsequently applied to assess the impacts of wicking geotextile if it was installed on the road section. The model simulated the coupled temporal and spatial variations in soil moisture content and temperature. The simulation results demonstrated that wicking geotextile would create a suction zone around its installation location to draw water from surrounding soils, therefore reducing the overall unfrozen water content in the pavement. The results also showed that the installation of wicking geotextile would delay the initiation of frost heave and reduce its magnitude in cold region pavement.

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Section: Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Multiphysics Simulation of the Effects of Wicking Geotextile on Mitigating Frost Heave under Cold Region Pavement

Jiang,

Alajlan,

Zapata

et al. 2024

Geosciences

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“…The aim is to test the applicability of the model in simulating the response of geo-infrastructures to environmental loads of cold regions. The parameters utilized in the simulation are found from literature (Dong et al, 2021) or through calibration, as detailed in Table 1, 3 and 5. Since the pavement surface material is asphalt concrete, a material with very low permeability, the hydraulic process is not considered in it, where only thermal field calculate is conducted.…”

Section: Verication By Case Studymentioning

confidence: 99%

Holistic multiphysics simulation of the climatic responses of cold region pavements

Jiang,

2023

Preprint

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In cold regions, the environment dynamics lead to variations of soil temperature, water content, and deformation, which are characterized by highly coupled physical interplay. The hydraulic and thermal properties of unsaturated soils are highly nonlinear, which is further complicated when subjected to freezing. This paper presents a comprehensive multiphysics coupling model to evaluate these complex processes. The model considers the behaviors of unsaturated frozen soils. It accounts for the influences of meteorological, geothermal, and hydrological factors. The model is validated through two pavement case studies using Long-Term Pavement Performance (LTPP) road section data. The first case analysis is performed for a pavement section in Vermont, and the simulation lasted for 30 days during a non-freezing season on an hourly basis. The results validated the performance of the model considering unsaturated soil behaviors. The second case study is based on a daily analysis of a pavement section in South Dakota over a freezing-thawing cycle over 194 days. The results validated the model in considering the frozen unsaturated soil behaviors. Both case studies demonstrate the performance of this comprehensive model in quantifying the spatial and temporal variations of soil temperature and water content in response to environmental stressors. The capability of the model in accurately predicting the responses of pavement to the meteorological factors unleashes the potential of this model to assess the effects of climate and climate change on cold region pavement, as well as other types of geostructures.

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“…This process results in mass wasting of fine‐grained materials in cold climates and volumetric change in the RTS development area (Bernhard et al, 2022; Harris et al, 2017; Jorgenson, 2013). The formation of the RTS was initiated due to the thawing of the ice‐rich permafrost or melting of the massive ground ice, and a frozen steep headwall formed at the trailing edge of the slope (Dong et al, 2021; Niu et al, 2016). And then collapsed materials develop into solifluction, which is characterized by the mixture of thawed sediments and meltwater (Niu et al, 2012; Sun et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Quantifying the effect of a retrogressive thaw slump on soil freeze–thaw erosion in permafrost regions on the Qinghai–Tibet Plateau, China

et al. 2023

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Thermokarst terrain is developing at an accelerating pace in the ice‐rich permafrost on the Qinghai–Tibet Plateau (QTP), China, and the most dramatic of these terrain‐altering thermokarsts is retrogressive thaw slump (RTS). The freeze–thaw erosion (FTE) impacts are sharply increasing on the Plateau due to RTS, especially as a result of the migration of fine sediments in cold climates, these impacts are still not quantified due to the limitation of hydro‐thermal‐mass transport laws in RTS development. Moreover, it is difficult to assess the impact of RTS on the ecology and environment, especially on soil erosion. This study developed a heat–water‐mass transport coupled model of a RTS in the Beiluhe River Region on the QTP, considering the actual topography, water‐ice phase change, latent heat, and surface heat exchange layer. Based on the observed data of ground temperature, unfrozen water content, and heat flux, the coupled model herein is practicable for presenting the geotemperature regime and groundwater flow in the RTS area, thereby quantifying the ice‐rich permafrost thaw and mass wasting. The results presented indicate that: (1) the seepage velocity of the superficial zone (0–1.5 m depth) is two orders of magnitude higher than that of the permafrost table; (2) the mean ice‐rich permafrost thaw volume was 13.4 m2 from 2016 to 2021; and (3) the cumulative mass transport volume was 22 m2 from July 2020 to September 2021. In addition, the relation between the FTE (shown as the migration of sediments) and the amount of ground ice ablation can be fitted by an exponential equation. This work proposes a reliable method for quantifying the effect of FTE and is helpful to assess the eco‐environmental impacts of RTS.

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Analyses of the Impacts of Climate Change and Forest Fire on Cold Region Slopes Stability by Random Finite Element Method

Cited by 13 publications

References 35 publications

A Multiphysics Simulation of the Effects of Wicking Geotextile on Mitigating Frost Heave under Cold Region Pavement

A Multiphysics Simulation of the Effects of Wicking Geotextile on Mitigating Frost Heave under Cold Region Pavement

Holistic multiphysics simulation of the climatic responses of cold region pavements

Quantifying the effect of a retrogressive thaw slump on soil freeze–thaw erosion in permafrost regions on the Qinghai–Tibet Plateau, China

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