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How deep is your loch?


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Phil Taylor's How Deep Is Your Loch talk from the 6th Scottish QGIS UK user group meeting. Explores the bathymetry of four of Scotlands lochs - biggest, deepest, longest, most studied.

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How deep is your loch?

  1. 1. How Deep is Your Loch? (not a talk about the Bee Gees) (ahem) Philip Taylor | @ScienceAndMaps I know your eyes in the morning sun I feel you touch me in the pouring rain And the moment that you wander far from me I shout: “What’s the highest point in the UK?”
  2. 2. What’s the lowest (natural) point in the UK?
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  4. 4. Murray & Pullar, 1902
  5. 5. “Despite acknowledging the value of such a survey, the response from the Treasury indicated that the work was not in the interests of navigation and so fell outwith the functions of the Admiralty, whilst the Ordnance Survey would confine its attentions to dry land. As Murray concluded, 'we were led to take up this self-imposed task because ... there was no hope of the work being undertaken by any Government Department’ ” Murray & Pullar, 1910 vol. 1, p. 4.
  6. 6. “The accuracy of the soundings have generally been confirmed by later 20th century technology. For example, the Loch Ness bathymetric and seismic survey in 1992 using sonar measurements recorded a depth of 786 feet, only 32 feet more than the Bathymetrical Survey.” Young, I & Shine, A.J., 'Loch Ness bathymetric and seismic survey', The Scottish Naturalist 105 (1993), 23-43.
  7. 7. 1078 points…
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  10. 10. These methods have given a new measure of mean depth (102m, previously 87m), and a new measure of volume (2.74km3, previously 2.32km3). That additional volume is enough to cover the personal use of every person in Scotland for 1.5 years.
  11. 11. Philip Taylor | @ScienceAndMaps