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A Bog Flow at Straduff Townland, County Sligo

R. W. Alexander, P. Coxon and R. H. Thorn
Proceedings of the Royal Irish Academy. Section B: Biological, Geological, and Chemical Science
Vol. 86B (1986), pp. 107-119
Published by: Royal Irish Academy
Stable URL: http://www.jstor.org/stable/20494458
Page Count: 14
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A Bog Flow at Straduff Townland, County Sligo
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Abstract

A recent bog flow occurred in County Sligo during which 81,000m³ of material, ejected from an upland bog, flowed down a small stream channel towards the village of Geevagh. The general features of this event are described and the results of more detailed observations presented. The source area of the flow was surveyed shortly after the event and cores were taken to examine the stratigraphy, bulk density and moisture content of the peat. Five sections of the stream channel were surveyed in detail and the velocity and discharge of the flow were estimated using the Manning equation. The possible causes of the event are discussed in relation to previous bog flows in Ireland. The precise mechanism of failure is uncertain in this case, but antecedent rainfall, topography of the source area and the presence of a clay-rich drift underlying the peat are identified as potentially significant factors.

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