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Fate of groundwater inflow in Lake Thingvallavatn during early spring ice-breakup
Citation
Andradottir, HO and Forrest, AL and Laval, BE, Fate of groundwater inflow in Lake Thingvallavatn during early spring ice-breakup, Proceedings of the 13th International Workshop on Physical Processes in Natural Waters, 1 - 4 September 2009, Palermo, Italy, pp. 1-11. ISBN 978-88-903895-0-4 (2009) [Refereed Conference Paper]
Copyright Statement
Copyright 2009 Department of Hydraulic Engineering and Environmental Applications
Official URL: http://www.idra.unipa.it/ppnw/
Abstract
Sub-artic Lake Thingvallavatn is one of Icelandīs largest, deepest and best known lakes.
Situated at the rift between the North American and Eurasian tectonic plates, it is part of a
world heritage site and a major tourist destination. From a hydrological viewpoint, the lake is
unique in that it is predominantly fed by groundwater springs originating from nearby glacier
Langjokull. The goal of this study was to establish the near field inflow dynamics of the
largest subsurface spring Silfra, contributing approximately 30% of the total inflows to the
lake, during early spring ice-breakup. A ten day field study was conducted in February 2009.
The groundwater inflows were found to have higher temperature, conductivity, and pH than
the receiving lake water. Using temperature as a tracer, the groundwater fate, and mixing
regimes were assessed both in open water and under ice, as ice was breaking up and shifting
in and out of the study area during the study period. Initial results from moored thermistor
chains, CTD profiles, ADV measurements, weather stations and Autonomous Underwater
Vehicle (AUV) borne CTD will shed a stronger light on the interaction of river inflows, ice
cover and meterological forcings during winter ice cover and early spring break-up. The use
of an AUV platform to collect horizontal CTD profiles characterizes horizontal variability of
water properties in open and ice-covered water, something that cannot be obtained using
conventional techniques.
Item Details
Item Type: | Refereed Conference Paper |
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Keywords: | auvs, thingvallavatn, underflows |
Research Division: | Engineering |
Research Group: | Maritime engineering |
Research Field: | Special vehicles |
Objective Division: | Environmental Management |
Objective Group: | Other environmental management |
Objective Field: | Other environmental management not elsewhere classified |
UTAS Author: | Forrest, AL (Dr Alexander Forrest) |
ID Code: | 88943 |
Year Published: | 2009 |
Deposited By: | NC Maritime Engineering and Hydrodynamics |
Deposited On: | 2014-02-20 |
Last Modified: | 2014-12-19 |
Downloads: | 0 |
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