Quantifying landslide frequency and sediment residence time in the Nepal Himalaya

David Michael Whipp, Todd Ehlers

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Kuvaus

Quantifying how Earth surface processes interact with climate, tectonics, and biota has proven challenging, in part due to the stochastic nature of erosion and sedimentation. Landsliding is a common stochastic erosional process that may account for >50% of the sediment produced in steep mountainous landscapes. Here, we calculate the effects of landsliding and the residence time of sediment in a steep drainage basin in the Nepal Himalaya using a numerical model of landslide erosion combined with published cooling age distributions from two river sediment samples collected several years apart. We find that the difference in the two samples can be explained by landsliding and that the age distributions suggest that the residence time of sediment in the catchment is no greater than 50 years. This sensitivity to landsliding thus offers potential to improve our understanding of stochastic erosional processes, and further suggests that sediment is rapidly evacuated from steep mountainous drainage basins.

Alkuperäiskielienglanti
Artikkeli3482
LehtiScience Advances
Vuosikerta5
Numero4
Sivumäärä7
ISSN2375-2548
DOI - pysyväislinkit
TilaJulkaistu - huhtikuuta 2019
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

Tieteenalat

  • 1171 Geotieteet

Lainaa tätä

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title = "Quantifying landslide frequency and sediment residence time in the Nepal Himalaya",
abstract = "Quantifying how Earth surface processes interact with climate, tectonics, and biota has proven challenging, in part due to the stochastic nature of erosion and sedimentation. Landsliding is a common stochastic erosional process that may account for >50{\%} of the sediment produced in steep mountainous landscapes. Here, we calculate the effects of landsliding and the residence time of sediment in a steep drainage basin in the Nepal Himalaya using a numerical model of landslide erosion combined with published cooling age distributions from two river sediment samples collected several years apart. We find that the difference in the two samples can be explained by landsliding and that the age distributions suggest that the residence time of sediment in the catchment is no greater than 50 years. This sensitivity to landsliding thus offers potential to improve our understanding of stochastic erosional processes, and further suggests that sediment is rapidly evacuated from steep mountainous drainage basins.",
keywords = "1171 Geosciences, CATCHMENT EROSION, GRAIN-SIZE",
author = "Whipp, {David Michael} and Todd Ehlers",
year = "2019",
month = "4",
doi = "10.1126/sciadv.aav3482",
language = "English",
volume = "5",
journal = "Science Advances",
issn = "2375-2548",
publisher = "American Association for the Advancement of Science (AAAS)",
number = "4",

}

Quantifying landslide frequency and sediment residence time in the Nepal Himalaya. / Whipp, David Michael; Ehlers, Todd.

julkaisussa: Science Advances, Vuosikerta 5, Nro 4, 3482, 04.2019.

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

TY - JOUR

T1 - Quantifying landslide frequency and sediment residence time in the Nepal Himalaya

AU - Whipp, David Michael

AU - Ehlers, Todd

PY - 2019/4

Y1 - 2019/4

N2 - Quantifying how Earth surface processes interact with climate, tectonics, and biota has proven challenging, in part due to the stochastic nature of erosion and sedimentation. Landsliding is a common stochastic erosional process that may account for >50% of the sediment produced in steep mountainous landscapes. Here, we calculate the effects of landsliding and the residence time of sediment in a steep drainage basin in the Nepal Himalaya using a numerical model of landslide erosion combined with published cooling age distributions from two river sediment samples collected several years apart. We find that the difference in the two samples can be explained by landsliding and that the age distributions suggest that the residence time of sediment in the catchment is no greater than 50 years. This sensitivity to landsliding thus offers potential to improve our understanding of stochastic erosional processes, and further suggests that sediment is rapidly evacuated from steep mountainous drainage basins.

AB - Quantifying how Earth surface processes interact with climate, tectonics, and biota has proven challenging, in part due to the stochastic nature of erosion and sedimentation. Landsliding is a common stochastic erosional process that may account for >50% of the sediment produced in steep mountainous landscapes. Here, we calculate the effects of landsliding and the residence time of sediment in a steep drainage basin in the Nepal Himalaya using a numerical model of landslide erosion combined with published cooling age distributions from two river sediment samples collected several years apart. We find that the difference in the two samples can be explained by landsliding and that the age distributions suggest that the residence time of sediment in the catchment is no greater than 50 years. This sensitivity to landsliding thus offers potential to improve our understanding of stochastic erosional processes, and further suggests that sediment is rapidly evacuated from steep mountainous drainage basins.

KW - 1171 Geosciences

KW - CATCHMENT EROSION

KW - GRAIN-SIZE

U2 - 10.1126/sciadv.aav3482

DO - 10.1126/sciadv.aav3482

M3 - Article

VL - 5

JO - Science Advances

JF - Science Advances

SN - 2375-2548

IS - 4

M1 - 3482

ER -