A multi-sensor approach to continuous monitoring of a glacier outflow channel: Virkisá River, SE Iceland

Andrew Black (Lead / Corresponding author), Jez Everest, Alan MacDonald, Verity Flett, Heiko Buxel, Tom Shanahan

Research output: Contribution to conferenceAbstract

Abstract

Continuous monitoring of meltwater river flows provides valuable data in understanding glacier response to changing climatic conditions. Where glacial catchment runoff converges into a single channel, continuous flow measurement enables total catchment outflow to be quantified, comprising total melt of snow and ice, plus rainfall-derived runoff. However, in practice, the derivation of continuous flow data is often constrained by practical considerations – such as ice affecting the continuous monitoring of water levels and frequently shifting channel features. A multi-sensor approach has been adopted in monitoring the Virkisá River, SE Iceland, to attempt to address these challenges. A road bridge is used as the gauging site, given the otherwise braided nature of the channel, and the structure of the bridge as a robust monitoring platform. Water level sensors have been installed in the centre and margin of the river channel, to generate independent measurements of water level. Water temperature is recorded by one of the sensors, and contributes to the quality assurance of the water level time series. The site is calibrated by periodic flow gaugings obtained either by wading or, in higher flows, by bridge gaugings. A water-surface velocity sensor facilitates a continuous, independent and indirect check on the calibration. This permits the detection of any rating shifts which may occur between infrequent site visits. Finally, two cameras provide visual information on conditions, allowing assessments of the presence or absence of ice, evidence of control changes, and unexpectedly detecting the temporary diversion of the channel while bridge maintenance was undertaken. In the first 3 years of operation, the resultant flow record after quality control is 83% complete, yielding a catchment-average annual runoff of 5.7 m. The multi-sensor approach has proved successful in generating reliable data and allowing new insights into the melt behaviour of the glacier, and surface water/groundwater interactions in the adjacent sandur.
Original languageEnglish
Number of pages1
Publication statusPublished - 26 Jun 2015
EventInternational Symposium on Hydrology of Glaciers and Ice Sheets - Hotel Vatnajökull at Lindarbakki, Höfn in Hornafjörður, Iceland
Duration: 21 Jun 201526 Jun 2015
http://en.vedur.is/conferences/igs-2015

Conference

ConferenceInternational Symposium on Hydrology of Glaciers and Ice Sheets
CountryIceland
CityHöfn in Hornafjörður
Period21/06/1526/06/15
Internet address

Fingerprint

river channel
glacier
outflow
sensor
water level
monitoring
catchment
runoff
ice
melt
groundwater-surface water interaction
flow measurement
meltwater
river flow
quality control
water temperature
snow
time series
road
calibration

Cite this

Black, A., Everest, J., MacDonald, A., Flett, V., Buxel, H., & Shanahan, T. (2015). A multi-sensor approach to continuous monitoring of a glacier outflow channel: Virkisá River, SE Iceland. Abstract from International Symposium on Hydrology of Glaciers and Ice Sheets, Höfn in Hornafjörður, Iceland.
Black, Andrew ; Everest, Jez ; MacDonald, Alan ; Flett, Verity ; Buxel, Heiko ; Shanahan, Tom. / A multi-sensor approach to continuous monitoring of a glacier outflow channel: Virkisá River, SE Iceland. Abstract from International Symposium on Hydrology of Glaciers and Ice Sheets, Höfn in Hornafjörður, Iceland.1 p.
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Black, A, Everest, J, MacDonald, A, Flett, V, Buxel, H & Shanahan, T 2015, 'A multi-sensor approach to continuous monitoring of a glacier outflow channel: Virkisá River, SE Iceland' International Symposium on Hydrology of Glaciers and Ice Sheets, Höfn in Hornafjörður, Iceland, 21/06/15 - 26/06/15, .

A multi-sensor approach to continuous monitoring of a glacier outflow channel: Virkisá River, SE Iceland. / Black, Andrew (Lead / Corresponding author); Everest, Jez; MacDonald, Alan; Flett, Verity; Buxel, Heiko; Shanahan, Tom.

2015. Abstract from International Symposium on Hydrology of Glaciers and Ice Sheets, Höfn in Hornafjörður, Iceland.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - A multi-sensor approach to continuous monitoring of a glacier outflow channel: Virkisá River, SE Iceland

AU - Black, Andrew

AU - Everest, Jez

AU - MacDonald, Alan

AU - Flett, Verity

AU - Buxel, Heiko

AU - Shanahan, Tom

N1 - Presented at session: Jökulhlaups and hazards

PY - 2015/6/26

Y1 - 2015/6/26

N2 - Continuous monitoring of meltwater river flows provides valuable data in understanding glacier response to changing climatic conditions. Where glacial catchment runoff converges into a single channel, continuous flow measurement enables total catchment outflow to be quantified, comprising total melt of snow and ice, plus rainfall-derived runoff. However, in practice, the derivation of continuous flow data is often constrained by practical considerations – such as ice affecting the continuous monitoring of water levels and frequently shifting channel features. A multi-sensor approach has been adopted in monitoring the Virkisá River, SE Iceland, to attempt to address these challenges. A road bridge is used as the gauging site, given the otherwise braided nature of the channel, and the structure of the bridge as a robust monitoring platform. Water level sensors have been installed in the centre and margin of the river channel, to generate independent measurements of water level. Water temperature is recorded by one of the sensors, and contributes to the quality assurance of the water level time series. The site is calibrated by periodic flow gaugings obtained either by wading or, in higher flows, by bridge gaugings. A water-surface velocity sensor facilitates a continuous, independent and indirect check on the calibration. This permits the detection of any rating shifts which may occur between infrequent site visits. Finally, two cameras provide visual information on conditions, allowing assessments of the presence or absence of ice, evidence of control changes, and unexpectedly detecting the temporary diversion of the channel while bridge maintenance was undertaken. In the first 3 years of operation, the resultant flow record after quality control is 83% complete, yielding a catchment-average annual runoff of 5.7 m. The multi-sensor approach has proved successful in generating reliable data and allowing new insights into the melt behaviour of the glacier, and surface water/groundwater interactions in the adjacent sandur.

AB - Continuous monitoring of meltwater river flows provides valuable data in understanding glacier response to changing climatic conditions. Where glacial catchment runoff converges into a single channel, continuous flow measurement enables total catchment outflow to be quantified, comprising total melt of snow and ice, plus rainfall-derived runoff. However, in practice, the derivation of continuous flow data is often constrained by practical considerations – such as ice affecting the continuous monitoring of water levels and frequently shifting channel features. A multi-sensor approach has been adopted in monitoring the Virkisá River, SE Iceland, to attempt to address these challenges. A road bridge is used as the gauging site, given the otherwise braided nature of the channel, and the structure of the bridge as a robust monitoring platform. Water level sensors have been installed in the centre and margin of the river channel, to generate independent measurements of water level. Water temperature is recorded by one of the sensors, and contributes to the quality assurance of the water level time series. The site is calibrated by periodic flow gaugings obtained either by wading or, in higher flows, by bridge gaugings. A water-surface velocity sensor facilitates a continuous, independent and indirect check on the calibration. This permits the detection of any rating shifts which may occur between infrequent site visits. Finally, two cameras provide visual information on conditions, allowing assessments of the presence or absence of ice, evidence of control changes, and unexpectedly detecting the temporary diversion of the channel while bridge maintenance was undertaken. In the first 3 years of operation, the resultant flow record after quality control is 83% complete, yielding a catchment-average annual runoff of 5.7 m. The multi-sensor approach has proved successful in generating reliable data and allowing new insights into the melt behaviour of the glacier, and surface water/groundwater interactions in the adjacent sandur.

UR - https://www.igsoc.org/symposia/2015/iceland/proceedings/procsfiles/procabstracts_67.html#A1714

UR - https://www.igsoc.org/symposia/2015/iceland/proceedings/programmepure.html#Prog1669

M3 - Abstract

ER -

Black A, Everest J, MacDonald A, Flett V, Buxel H, Shanahan T. A multi-sensor approach to continuous monitoring of a glacier outflow channel: Virkisá River, SE Iceland. 2015. Abstract from International Symposium on Hydrology of Glaciers and Ice Sheets, Höfn in Hornafjörður, Iceland.