How deep is your loch?

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    19-Jan-2017

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  • 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: Whats the highest point in the UK?

  • Whats the lowest (natural) point

    in the UK?

  • http://www.bbc.co.uk/news/uk-scotland-highlands-islands-36024638

  • Murray & Pullar, 1902

  • 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.

  • 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.

  • 1078 points

  • https://bost.ocks.org/mike/simplify/

  • contours.org.uk/bathymetry

  • 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.

  • Philip Taylor | @ScienceAndMaps