A fluidized landslide occurred in the Loess Plateau: A study on loess landslide in South Jingyang tableland

Leng, Yanqiu; Peng, Jianbing; Wang, Qiyao; Meng, Zhenjiang; Wei-liang, Huang

doi:10.1016/j.enggeo.2017.05.006

Cited by 172 publications

(53 citation statements)

References 19 publications

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“…Irrigation concrete-ditch prevented the evaporation of groundwater, resulting in the "canopy-cover" effect [16,17]. Focusing on the loess plateau, many loess landslides caused by seasonal irrigation have been also occurred [2,[18][19][20]. For instance, there have been 120 loess landslide events in the Heifangtai area, which have killed approximately 70 people, due to irrigation, since 1984 [21].…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…The Jinghe River flows southeast through the Guanzhong basin before finally joining the Weihe River. The South Jingyang Plateau is a small part of the Weibei Loess Plateau in the Guanzhong area and it has a surface elevation of 430 to 500 m, slightly tilted toward the southeast (Xu et al, 2013;Peng et al, 2017;Wang et al, 2018;Leng et al, 2018).…”

Section: Geographical and Geochronological Backgroundmentioning

confidence: 99%

Influence of Quaternary paleoclimate change on the permeability of the loess–paleosol sequence in the Loess Plateau, northern China

Hou

Qian

Zhang

et al. 2020

Earth Surf Processes Landf

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Permeability differences in multi‐cycle loess–paleosol aeolian sediments, which are still poorly understood, have the potential to significantly improve our understanding of climatic change during the glacial–interglacial periods of the Quaternary. In this study, the permeability of a well‐preserved and continuous loess–paleosol sequence in the South Jingyang Plateau was investigated. Weathering intensity was inferred using a series of climate proxies including grain‐size distribution, magnetic susceptibility and mineralogy. The results of laboratory tests showed that the average saturated hydraulic conductivity of loess layers is higher than that of paleosol layers. Also, clear differences between loess and paleosol were found in terms of depth variations of the vertical and horizontal saturated hydraulic conductivities. Differences in loess–paleosol were also found for other proxies for pedogenic weathering [i.e. clay content, sand content, Kd value (ratio of coarse silt to clay), magnetic susceptibility, dolomite content and the ratios of hornblende/illite and hornblende/chlorite]. Our results showed a high permeability of loess layers associated with weak pedogenic weathering during cold/dry paleoclimatic conditions in glacial stages. On the contrary, paleosol layers developed in a warm/humid climate during the interglacial stages experienced strong pedogenic weathering that resulted in lower permeability. Based on these results, we construct a connection between Quaternary climate change theory and the modern hydrological system. This provides a scientific basis for investigating the distribution and pollution of groundwater resources in the local region. © 2020 John Wiley & Sons, Ltd.

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“…Three papers present typical case studies of loess geohazards. Leng et al (2018) introduce a fluidized landslide occurred in South Jinyang tableland located in the southern part of the Chinese Loess Plateau. Around 20,000 m3 of loess rapidly slid from a 65 m high slope travelling some 260 m. The moisture content test results show that the degree of water saturation in the landslide depression was relatively high, and the leading edge was in a flow state.…”

Section: Loess Geohazardsmentioning

confidence: 99%

Preface to the special issue on “Loess engineering properties and loess geohazards”

Peng

Williams³

et al. 2018

Engineering Geology

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A fluidized landslide occurred in the Loess Plateau: A study on loess landslide in South Jingyang tableland

Cited by 172 publications

References 19 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

Influence of Quaternary paleoclimate change on the permeability of the loess–paleosol sequence in the Loess Plateau, northern China

Preface to the special issue on “Loess engineering properties and loess geohazards”

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