Suspended sediment in a high-Arctic river: an appraisal of flux estimation methods

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Standard

Suspended sediment in a high-Arctic river : an appraisal of flux estimation methods. / Ladegaard-Pedersen, Pernille; Sigsgaard, Charlotte; Kroon, Aart; Abermann, Jakob; Skov, Kirstine; Elberling, Bo.

I: Science of the Total Environment, Bind 580, 2017, s. 582-592.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

Harvard

Ladegaard-Pedersen, P, Sigsgaard, C, Kroon, A, Abermann, J, Skov, K & Elberling, B 2017, 'Suspended sediment in a high-Arctic river: an appraisal of flux estimation methods', Science of the Total Environment, bind 580, s. 582-592. https://doi.org/10.1016/j.scitotenv.2016.12.006

APA

Ladegaard-Pedersen, P., Sigsgaard, C., Kroon, A., Abermann, J., Skov, K., & Elberling, B. (2017). Suspended sediment in a high-Arctic river: an appraisal of flux estimation methods. Science of the Total Environment, 580, 582-592. https://doi.org/10.1016/j.scitotenv.2016.12.006

Vancouver

Ladegaard-Pedersen P, Sigsgaard C, Kroon A, Abermann J, Skov K, Elberling B. Suspended sediment in a high-Arctic river: an appraisal of flux estimation methods. Science of the Total Environment. 2017;580:582-592. https://doi.org/10.1016/j.scitotenv.2016.12.006

Author

Ladegaard-Pedersen, Pernille ; Sigsgaard, Charlotte ; Kroon, Aart ; Abermann, Jakob ; Skov, Kirstine ; Elberling, Bo. / Suspended sediment in a high-Arctic river : an appraisal of flux estimation methods. I: Science of the Total Environment. 2017 ; Bind 580. s. 582-592.

Bibtex

@article{804a2bc0eb9642c5b690f482d6c546c7,
title = "Suspended sediment in a high-Arctic river: an appraisal of flux estimation methods",
abstract = "Quantifying fluxes of water, sediment and dissolved compounds through Arctic rivers is important for linking the glacial, terrestrial and marine ecosystems and to quantify the impact of a warming climate. The quantification of fluxes is not trivial. This study uses a 8-years data set (2005-2012) of daily measurements from the high-Artic Zackenberg River in Northeast Greenland to estimate annual suspended sediment fluxes based on four commonly used methods: M1) is the discharge weighted mean and uses direct measurements, while M2-M4) are one uncorrected and two bias corrected rating curves extrapolating a continuous concentration trace from measured values. All methods are tested on complete and reduced datasets. The average annual runoff in the period 2005-2012 was 190±25mio·m3 y-1. The different estimation methods gave a range of average annual suspended sediment fluxes between 43,000±10,000ty-1 and 61,000±16,000ty-1. Extreme events with high discharges had a mean duration of 1day. The average suspended sediment flux during extreme events was 17,000±5000ty-1, which constitutes a year-to-year variation of 20-37{\%} of the total annual flux. The most accurate sampling strategy was bi-daily sampling together with a sampling frequency of 2h during extreme events. The most consistent estimation method was an uncorrected rating curve of bi-daily measurements (M2), combined with a linear interpolation of extreme event fluxes. Sampling can be reduced to every fourth day, with both method-agreements and accuracies <±10{\%}, using 7year averages. The specific annual method-agreements were <±10{\%} for all years and the specific annual accuracies <±20{\%} for 6years out of 7. The rating curves were less sensitive to day-to-day variations in the measured suspended sediment concentrations. The discharge weighted mean was not recommended in the high-Arctic Zackenberg River, unless sampling was done bi-daily, every day and events sampled high-frequently.",
keywords = "Annual suspended sediment flux, Arctic river discharge, Estimation methods, Extreme events, Q/h relation",
author = "Pernille Ladegaard-Pedersen and Charlotte Sigsgaard and Aart Kroon and Jakob Abermann and Kirstine Skov and Bo Elberling",
note = "CENPERM[2017]",
year = "2017",
doi = "10.1016/j.scitotenv.2016.12.006",
language = "English",
volume = "580",
pages = "582--592",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Suspended sediment in a high-Arctic river

T2 - an appraisal of flux estimation methods

AU - Ladegaard-Pedersen, Pernille

AU - Sigsgaard, Charlotte

AU - Kroon, Aart

AU - Abermann, Jakob

AU - Skov, Kirstine

AU - Elberling, Bo

N1 - CENPERM[2017]

PY - 2017

Y1 - 2017

N2 - Quantifying fluxes of water, sediment and dissolved compounds through Arctic rivers is important for linking the glacial, terrestrial and marine ecosystems and to quantify the impact of a warming climate. The quantification of fluxes is not trivial. This study uses a 8-years data set (2005-2012) of daily measurements from the high-Artic Zackenberg River in Northeast Greenland to estimate annual suspended sediment fluxes based on four commonly used methods: M1) is the discharge weighted mean and uses direct measurements, while M2-M4) are one uncorrected and two bias corrected rating curves extrapolating a continuous concentration trace from measured values. All methods are tested on complete and reduced datasets. The average annual runoff in the period 2005-2012 was 190±25mio·m3 y-1. The different estimation methods gave a range of average annual suspended sediment fluxes between 43,000±10,000ty-1 and 61,000±16,000ty-1. Extreme events with high discharges had a mean duration of 1day. The average suspended sediment flux during extreme events was 17,000±5000ty-1, which constitutes a year-to-year variation of 20-37% of the total annual flux. The most accurate sampling strategy was bi-daily sampling together with a sampling frequency of 2h during extreme events. The most consistent estimation method was an uncorrected rating curve of bi-daily measurements (M2), combined with a linear interpolation of extreme event fluxes. Sampling can be reduced to every fourth day, with both method-agreements and accuracies <±10%, using 7year averages. The specific annual method-agreements were <±10% for all years and the specific annual accuracies <±20% for 6years out of 7. The rating curves were less sensitive to day-to-day variations in the measured suspended sediment concentrations. The discharge weighted mean was not recommended in the high-Arctic Zackenberg River, unless sampling was done bi-daily, every day and events sampled high-frequently.

AB - Quantifying fluxes of water, sediment and dissolved compounds through Arctic rivers is important for linking the glacial, terrestrial and marine ecosystems and to quantify the impact of a warming climate. The quantification of fluxes is not trivial. This study uses a 8-years data set (2005-2012) of daily measurements from the high-Artic Zackenberg River in Northeast Greenland to estimate annual suspended sediment fluxes based on four commonly used methods: M1) is the discharge weighted mean and uses direct measurements, while M2-M4) are one uncorrected and two bias corrected rating curves extrapolating a continuous concentration trace from measured values. All methods are tested on complete and reduced datasets. The average annual runoff in the period 2005-2012 was 190±25mio·m3 y-1. The different estimation methods gave a range of average annual suspended sediment fluxes between 43,000±10,000ty-1 and 61,000±16,000ty-1. Extreme events with high discharges had a mean duration of 1day. The average suspended sediment flux during extreme events was 17,000±5000ty-1, which constitutes a year-to-year variation of 20-37% of the total annual flux. The most accurate sampling strategy was bi-daily sampling together with a sampling frequency of 2h during extreme events. The most consistent estimation method was an uncorrected rating curve of bi-daily measurements (M2), combined with a linear interpolation of extreme event fluxes. Sampling can be reduced to every fourth day, with both method-agreements and accuracies <±10%, using 7year averages. The specific annual method-agreements were <±10% for all years and the specific annual accuracies <±20% for 6years out of 7. The rating curves were less sensitive to day-to-day variations in the measured suspended sediment concentrations. The discharge weighted mean was not recommended in the high-Arctic Zackenberg River, unless sampling was done bi-daily, every day and events sampled high-frequently.

KW - Annual suspended sediment flux

KW - Arctic river discharge

KW - Estimation methods

KW - Extreme events

KW - Q/h relation

U2 - 10.1016/j.scitotenv.2016.12.006

DO - 10.1016/j.scitotenv.2016.12.006

M3 - Journal article

VL - 580

SP - 582

EP - 592

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -

ID: 172388767