Evolution of the hydrogeological structure and disaster-generating mechanisms of landslides in loess slopes of the southern Jingyang Plateau, Shaanxi, China

Wang, Wei; Li, Jinlong; Li, Xinyan; Wang, Yu

doi:10.1007/s10040-020-02195-x

Cited by 11 publications

(2 citation statements)

References 21 publications

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“…Since the implementation of irrigation, the annual recharge has increased by 268.4 × 10 4 m 3 , which means that approximately 236.3 × 10 4 m 3 of water is stored in the loess, not including the amount of excretion. According to the effective irrigation area, the groundwater level is increased by approximately 1 m. According to the variation of the groundwater level at a representative point on the South Jingyang Plateau (Table 3) [25,39,40], we can observe that: (1) In 1976, the groundwater depth was relatively great, and the elevation of the groundwater level was close to that of the riverbed, which was generally lower than that of the Jinghe River bed by approximately 1-8 m. (2) Comparing 1992 with 1976, the groundwater level was obviously elevated at the same point, the uplift was approximately 13-37 m, and the groundwater level was approximately 4-30 m higher than the riverbed. Taking the five representative points in Table 3 as a basic reference, the phreatic water level on the South Jingyang Plateau in 1992 was increased by an average of 23.2 m compared with 1976.…”

Section: Changes In Groundwater Levels On the South Jingyang Plateaumentioning

confidence: 99%

Triggering Influence of Seasonal Agricultural Irrigation on Shallow Loess Landslides on the South Jingyang Plateau, China

Yan

Peng

Huang

et al. 2019

Water

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Since large-scale agricultural irrigation began in the 1980s, 92 landslides have occurred around the South Jingyang Plateau during the past 40 years. The geological disaster and soil erosion have caused numerous casualties and substantial property loss. In this work, several field investigations are carried out to explore the soil erosion and mechanical mechanism of these irrigated shallow loess landslides on the South Jingyang Plateau. (1) We investigated the spatial distributions, types and developmental characteristics of loess landslides. (2) We surveyed and monitored seasonal agricultural irrigation features and groundwater changes in the area since the 1980s and found that irrigation is a significant factor influencing groundwater changes, soil erosion and even causing landslides to occur. (3) Based on the field investigation, the occurrence of these irrigated shallow loess landslides was generalized, and it was found that the core process was due to the liquefaction of softening zone. We carried out a static liquefaction test and verified that the natural loess was prone to liquefaction. (4) The three main reasons for shallow loess landslides in the South Jingyang Plateau were discussed. This study provides a valuable reference for achieving an understanding of the relationship between seasonal agricultural irrigation and the occurrence of loess landslides in the area as well as similar irrigated agricultural areas.

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Section: Changes In Groundwater Levels On the South Jingyang Plateaumentioning

confidence: 99%

Triggering Influence of Seasonal Agricultural Irrigation on Shallow Loess Landslides on the South Jingyang Plateau, China

Yan

Peng

Huang

et al. 2019

Water

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“…Under the condition of rainfall infiltration, water migrates in the form of unsaturated seepage [4]. Understanding the characteristics of water migration in compacted loess is crucial to studying the stability of loess slope under rainfall infiltration [5,6] and the water migration in the loess foundation of high-filling engineering [7,8].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of water migration characteristics in compacted loess subjected to rainfall infiltration

Zhang

Han

et al. 2022

PLoS ONE

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In order to study the effect of the rainfall infiltration on water migration in compacted loess, a model device was developed for testing water migration in the soil under rainfall conditions. In this study, the volumetric water content and resistivity of soil were introduced into the model test device. This model test device was applied to the study of water migration characteristics in compacted loess under different rainfall conditions. The results show that the resistivity decreases with the increase of the volumetric water content at the same depth of the loess column. In this way, the characteristics of the water migration can also be reflected from the change of the resistivity. There is an intimate relationship between the resistivity and volumetric water content, dry density. The volumetric water content and dry density are normalized by saturation of loess, arriving the equation of saturation against the resistivity. The characteristics of rainfall infiltration in compacted loess show a particular pattern, which demonstrates that, with the increase of dry density of the loess column, the rainfall infiltration line present “Y”, “D” and “Λ” shape distribution respectively, under light rain, heavy rain and rainstorm.

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Experimental simulation of water and air migration under the presence of fissures and paleosols in unsaturated loess slopes

Liu

Wang

et al. 2022

Hydrogeol J

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Evolution of the hydrogeological structure and disaster-generating mechanisms of landslides in loess slopes of the southern Jingyang Plateau, Shaanxi, China

Cited by 11 publications

References 21 publications

Triggering Influence of Seasonal Agricultural Irrigation on Shallow Loess Landslides on the South Jingyang Plateau, China

Triggering Influence of Seasonal Agricultural Irrigation on Shallow Loess Landslides on the South Jingyang Plateau, China

Experimental study of water migration characteristics in compacted loess subjected to rainfall infiltration

Experimental simulation of water and air migration under the presence of fissures and paleosols in unsaturated loess slopes

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