Exploring the association between landslides and fluvial suspended sediment in a semi-arid basin in central Chile

Vergara, Iván; Garreaud, René; Moreiras, Stella Maris; Araneo, Diego Christian; Beigt, Débora

doi:10.1016/j.geomorph.2022.108129

Cited by 7 publications

(4 citation statements)

References 31 publications

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“…In the region, however, permafrost area is limited (Figure 1) and thermokarst processes mostly occur on rock glaciers, so phenomena like thermal river bank erosion, thermo‐erosion gullying and retrogressive thaw slumping have not been reported. Moreover, regional melt‐driven landslides are scarce (e.g., Hauser, 2002; Moreiras et al., 2018; Vergara Dol Pont et al., 2020), and hardly generate extremely high values of SSC and solid discharge at basin scale (Vergara et al., 2022). On this basis, we infer that permafrost degradation was not a primary cause of the increase in the average melt‐driven ETE from 2 to 22 per summer.…”

Section: Discussionmentioning

confidence: 99%

“…The SSC (g l −1 ) indicates the average sediment mass that each unit of river water transports in the water column at a given time, so it reflects well the upstream erosive processes, such as storms (Tramblay et al., 2008), earthquakes (Tolorza et al., 2019), landslides (Vergara et al., 2022) and snow and ice melt (Mao & Carrillo, 2017). Suspended sediment is usually classified into particles greater than 65 μm, that can come from river bed and their transport depends on stream velocity, and particles smaller than 65 μm, that have an insignificant presence in river bed and their transport is almost independent of stream velocity (they are deposited in lakes and reservoirs where water velocity is low, i.e., 0.15–0.2 m s −1 ; Basile, 2018; Kuhnle, 2013).…”

Section: Datamentioning

confidence: 99%

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Sharp Increase of Extreme Turbidity Events Due To Deglaciation in the Subtropical Andes

Vergara

Garreaud

2022

JGR Earth Surface

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High mountain environments have the greatest planetary erosion rates, mainly due to their steep slopes, geology and harsh climate, including low temperatures and often high precipitation rates (Willenbring et al., 2013). In these environments, glacier erosion has been one of the most important processes during the late Cenozoic, shaping the landscape through the abrasion and plucking generated by the ice flow (Herman et al., 2021). Sediments generated here are evacuated through rivers and wind. The environmental role of the sediments that rivers carry is crucial for the evolution of downstream landforms, nutrients flux and river and coastal ecosystems health (e.g.,

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Section: Discussionmentioning

confidence: 99%

Section: Datamentioning

confidence: 99%

Sharp Increase of Extreme Turbidity Events Due To Deglaciation in the Subtropical Andes

Vergara

Garreaud

2022

JGR Earth Surface

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“…The real-time acquisition of the hydrological characteristics of the barrier lake has been a major difficulty in the process of barrier lake risk prevention and control and secondary disaster prevention and control [9][10][11]. The two most fundamental elements of the hydrology of a dammed lake are the extent of the lake area and the sedimentation [12].…”

Section: Introductionmentioning

confidence: 99%

Changes in the Hydrological Characteristics of the Attabad Landslide-Dammed Lake on the Karakoram Highway

Li,

Yang,

et al. 2024

Water

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Understanding the evolving hydrological characteristics of landslide-induced barrier lakes is crucial for flood control, forecasting, early warning, and safety measures in reservoir areas. This study examines the changes in the hydrological characteristics of the Attabad landslide-dammed lake over the past decade after the occurrence of the landslide, focusing on lake area dynamics and sediment concentration. High-resolution satellite images from QuickBird, Pleiades, and WorldView2 over seven periods were analyzed. The findings indicate that the lake area has gradually decreased, with the center of mass shifting towards the lake dam, indicating a trend towards stability. The suspended sediment in the barrier lake is distributed in a strip running from north to south, then northeast to southwest, with the sediment concentration decreasing from the lake entrance to the dam and from the lake bank to the center. Over time, the average sediment concentration has decreased from 2010 to 2020, with higher concentrations in summer than in winter. Notably, during the 2017–2020 period, the lower-middle parts of the lake experienced a higher sediment concentration, while the dam area witnessed lower concentrations, thereby reducing the sediment impact on the dam. Furthermore, the sediment content in the middle of the dammed lake is relatively high, which may lead to the formation of a new dammed dam in the middle and the division of the original dammed lake into two smaller lakes, which will affect the stability of the dammed lake.

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“…The real-time acquisition of hydrological characteristics of barrier lake has been a major difficulty in the process of barrier lake risk prevention and control and secondary disaster prevention and control [9][10][11]. As the naturally formed barrier dam are not compacted and cemented, the risk factor of the dams increases dramatically which may cause secondary disasters at any time with the change of lake area and suspended sediment concentration (SSC) [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Changes in Hydrological Characteristics of Attabad Landslide-Dammed Lake on the KKH

Li,

Yang,

et al. 2023

Preprint

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Understanding the evolving hydrological characteristics of landslide-induced barrier lakes is crucial for flood control, forecasting, early warning, and safety measures in the reservoir area. This study examines the changes in hydrological characteristics of the Attabad landslide-dammed lake over the past decade after the occurrence of the landslide, focusing on lake area dynamics and sediment concentration. High-resolution satellite images from QuickBird, Pleiades, and WorldView2 over seven periods were analyzed. The findings indicate that the lake area has gradually decreased, with the center of mass shifting towards the lake dam, indicating a trend towards stability. The suspended sediment in the barrier lake is distributed in a strip running from north to south, then northeast to southwest, with sediment concentration decreasing from the lake entrance to the dam and from the lake bank to the center. Over time, the average sediment concentration has decreased from 2010 to 2020, with higher concentrations in summer than in winter. Notably, during the 2017-2020 period, the lower-middle parts of the lake experienced higher sediment concentration, while the dam area witnessed lower concentrations, thereby reducing the sediment impact on the dam.

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Exploring the association between landslides and fluvial suspended sediment in a semi-arid basin in central Chile

Cited by 7 publications

References 31 publications

Sharp Increase of Extreme Turbidity Events Due To Deglaciation in the Subtropical Andes

Sharp Increase of Extreme Turbidity Events Due To Deglaciation in the Subtropical Andes

Changes in the Hydrological Characteristics of the Attabad Landslide-Dammed Lake on the Karakoram Highway

Changes in Hydrological Characteristics of Attabad Landslide-Dammed Lake on the KKH

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