The internal erosion process and effects of undisturbed loess due to water infiltration

Zhuang, Jian; Peng, Jianbing; Zhu, Yi; Leng, Yanqiu; Zhu, Xinghua; Wei-liang, Huang

doi:10.1007/s10346-020-01518-z

Cited by 31 publications

(26 citation statements)

References 52 publications

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“…Different from precipitation, time lags between air temperature and velocities are decreasing and approximating zero (Figure 12E). Loess landslides and their kinetics mechanism in Heifangtai terraces have been comprehensively investigated through various measurements, experiments, and simulations (Xu et al, 2013;Fan et al, 2017;Liu et al, 2018;Qi et al, 2018;Zhang and Wang, 2018;Zhuang et al, 2020). The spatial pattern of the velocity fields derived here are in good agreement with those from previous studies (Liu et al, 2018).…”

Section: Wavelet Coherence Revealed Relation Between Surface Deformat...supporting

confidence: 78%

“…5, average time lags between rainfall and detrended deformation at the period of 1 year are 52, 34.5, 48, and 35 days on W1, S1, M1, and M2, respectively. It suggests that rainfall contributes to the motion of landslides both on the platform (W1, M1, and M2) and at its margins (S1), although irrigation dominates the long-term deformation in the Heitai platform (Gu et al, 2019a;Zhuang et al, 2020). Some other regions also show high correlation such as the signals during the mid-year of 2019 around the period of 32-64 days and that during the whole year of 2018 around the period of 128 days (Figure 11D).…”

Section: Wavelet Coherence Revealed Relation Between Surface Deformat...mentioning

confidence: 99%

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Water-temperature controlled deformation patterns in Heifangtai loess terraces revealed by wavelet analysis of InSAR time series and hydrological parameters

Cao

Wang

2022

Front. Environ. Sci.

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Loess deposits are widely distributed in western and central China. Because loess is wet-collapsible, loess mass is prone to failure after water infiltration. Heifangtai, composed of two adjacent typical loess platforms located in the Loess Plateau beside the Yellow River, has experienced hundreds of landslides in the past few decades. Here, we derived surficial time-series deformation, velocity, and amplitude of seasonality from the Sentinel-1 SAR images acquired from October 2014 to March 2021 in the Heifangtai region and studied their relation with precipitation, temperature, and irrigation applying wavelet analysis. The decomposed velocities show that not only a large amount of along-slope deformation occurred surrounding the terrace but also a significant subsidence in the residential area in the middle of the platform was observed. The high-seasonality areas are distributed along the Yellow River and on the terrace consistent with other water sources, e.g., springs and irrigation, revealing a promotion of a periodic water-involved process on deformation in loess. Through the wavelet analysis, we found that the temperature is almost in phase with the uplift velocity when the temperature is below the freezing point. The precipitation precedes the surface displacement of ∼1 to 2 months for water penetration. The comparison between irrigation volumes and averaged displacements suggests that irrigation also plays a role in promoting subsidence from March to October but uplift in winter due to frost heave. We highlight that the retrogressions of the terraces in this region may be accelerated by both natural and anthropogenic factors. Careful monitoring and water management are highly recommended for the safety of local residences and infrastructures.

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Section: Wavelet Coherence Revealed Relation Between Surface Deformat...supporting

confidence: 78%

Section: Wavelet Coherence Revealed Relation Between Surface Deformat...mentioning

confidence: 99%

Water-temperature controlled deformation patterns in Heifangtai loess terraces revealed by wavelet analysis of InSAR time series and hydrological parameters

Cao

Wang

2022

Front. Environ. Sci.

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“…The internal structure of loess landslides has been investigated and validated using a variety of methods. These include porosity analysis [34][35][36][37], fracture structure assessment [8,15,[38][39][40], landslide geometry evaluation [4,8,36], and investigation of subsurface geological conditions [8,15,17,22,23]. The techniques used include electrical testing [8,20,23,30,34,36], seismic testing [35,[41][42][43][44][45][46][47][48][49][50][51][52][53], mechanical testing [13][14][15]18,19,22,37,38], and borehole data analysis [9,31,43,47...…”

Section: Parameters Of Landslide Structuresmentioning

confidence: 99%

Factors Affecting the Stability of Loess Landslides: A Review

Wei,

Zeng,

Yan

2024

Applied Sciences

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The stability of loess landslides affects the production and livelihood of the people in its vicinity. The stability of loess landslides is influenced by various factors, including internal structure, collapsibility, water content, and shear strength. The landslide stability of loesses can be analyzed by several geophysical methods, such as seismic refraction tomography (SRT), electrical resistivity tomography (ERT), micro-seismic technology, and ground penetrating radar (GPR). Geotechnical tests (compression and shear tests) and remote sensing techniques (Global Navigation Satellite System (GNSS), Interferometric Synthetic Aperture Radar (InSAR) and airborne 3D laser technology) are used for studying the landslide stability of loesses as well. Some of the methods above can measure parameters (e.g., fractures, water content, shear strength, creep) which influence the stability of loess landslides, while other methods qualitatively indicate the influencing factors. Integrating parameters measured by different methods, minimizing disturbances to landslides, and assessing landslide stability are important steps in studying landslide hazards. This paper comprehensively introduces the methods used in recent studies on the landslide stability of loesses and summarizes the factors which affect the landslide stability. Furthermore, the relationships between different parameters and methods are examined. This paper enhances comprehension of the underlying mechanisms of the stability of loess landslides to diminish disastrous consequences.

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“…On the one hand, the loose accumulation of loess is more prone to natural disasters, such as slope instability, landslide, collapse, and debris flow while under the influence of natural factors and human activities [ 5 , 6 ]. Moreover, loess is vulnerable to erosion [ 7 ], and the formation of a large number of gullies provides a prerequisite for the occurrence of secondary disasters [ 8 , 9 , 10 , 11 ]. In addition, due to the loess’s unique structure, the loess area’s geological environment is extremely fragile; thus, engineering problems such as foundation settlement and tunnel collapse are often encountered [ 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Study on Improving Loess Properties with Permeable Polymer Materials

Zhuang

Kong

et al. 2022

Polymers

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Loess has strong water sensitivity, strong collapsibility, and low strength resulting in failures such as landslides, due to its loose structure. In order to improve the loess characteristics and to better meet the needs of engineering, a colorless, transparent, and permeable composite material is proposed in this paper. Water stability, erosion, unconfined compression, and triaxial tests were conducted to investigate the change of the strength properties and soil erosion resistance. The water sensitivity and strength properties of the loess are significantly improved as the stabilizer concentration increases. When scoured for 20 min, the erosion rates of the reinforced and the unreinforced soil were 95% and 6.25%, respectively, and demonstrated a 15.12 times reduction in erosion rates. The optimal concentration of the mixed solution is 0.6%. The triaxial test, CT, and SEM scanning tests were used to reveal the intrinsic mechanisms. The results demonstrated that the internal friction angle of the reinforced soil increases from 28.09° to 30.57°, and the cohesion changes from 25 kPa to 37.4 kPa. A large number of pores with a diameter of 900–1000 μm are reduced to 0–200 μm, and some pores with a length greater than 600 μm reduce to a length of less than 200 μm; The agglomeration and cementation, the filling of pores, and the formation of membrane structures have contributed greatly to the improvement of loess properties. Furthermore, the newly composite material has significant application potential needed to stabilize soil.

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The internal erosion process and effects of undisturbed loess due to water infiltration

Cited by 31 publications

References 52 publications

Water-temperature controlled deformation patterns in Heifangtai loess terraces revealed by wavelet analysis of InSAR time series and hydrological parameters

Water-temperature controlled deformation patterns in Heifangtai loess terraces revealed by wavelet analysis of InSAR time series and hydrological parameters

Factors Affecting the Stability of Loess Landslides: A Review

Study on Improving Loess Properties with Permeable Polymer Materials

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