Files
Download Full Text (4.6 MB)
Publication Date
4-1-2017
Publication Title
Journal of Hydrology and Regional Studies
Volume Number
10
Abstract
Bell Harbour is difficult to investigate using traditional hydrogeological techniques due to its complex mixture of upland, lowland and coastal karst, with ephemeral lakes and submarine/intertidal discharges. This study uses electrical resistivity tomography and discrete conduit network modelling to characterise the hydrogeology of the catchment by determining flow pathways and their likely hydraulic mechanisms. Results suggest two primary pathways of northwards groundwater flow in the catchment, a fault which discharges offshore, and a ∼2 m diameter karst conduit running underneath the catchment lowlands against the prevailing geological dip. This conduit, whose existence was suspected but never confirmed, links a large ephemeral lake to the coast where it discharges intertidally. Hydraulic modelling indicates that the conduit network is a complex mixture of constrictions with multiple inlets and outlets. Two ephemeral lakes are shown to be hydraulically discontinuous, either drained separately or linked by a low pressure channel.
Document Type
Article
Digital Object Identifier (DOI)
https://doi.org/10.1016/j.ejrh.2016.12.083
Language
English
Recommended Citation
McCormack, T.; O’Connell, Y.; Daly, E.; Gill, L.W.; Henry, T.; and Perriquet, M., "Characterisation of karst hydrogeology in Western Ireland using geophysical and hydraulic modelling techniques" (2017). KIP Articles. 8317.
https://digitalcommons.usf.edu/kip_articles/8317
