How deep is your loch?

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    19-Jan-2017

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<ul><li><p>How Deep is Your Loch? </p><p>(not a talk about the Bee Gees) </p><p>(ahem) </p><p>Philip Taylor | @ScienceAndMaps </p><p>I know your eyes in the morning sun </p><p>I feel you touch me in the pouring rain </p><p>And the moment that you wander far from me </p><p>I shout: Whats the highest point in the UK? </p></li><li><p>Whats the lowest (natural) point </p><p> in the UK? </p></li><li><p>http://www.bbc.co.uk/news/uk-scotland-highlands-islands-36024638 </p></li><li><p>Murray &amp; Pullar, 1902 </p></li><li><p>Despite acknowledging the value of such a survey, the </p><p>response from the Treasury indicated that the work was </p><p>not in the interests of navigation and so fell outwith the </p><p>functions of the Admiralty, whilst the Ordnance Survey </p><p>would confine its attentions to dry land. As Murray </p><p>concluded, 'we were led to take up this self-imposed task </p><p>because ... there was no hope of the work being </p><p>undertaken by any Government Department </p><p>Murray &amp; Pullar, 1910 vol. 1, p. 4. </p></li><li><p>The accuracy of the soundings have generally been </p><p>confirmed by later 20th century technology. For </p><p>example, the Loch Ness bathymetric and seismic </p><p>survey in 1992 using sonar measurements recorded </p><p>a depth of 786 feet, only 32 feet more than the </p><p>Bathymetrical Survey. </p><p>Young, I &amp; Shine, A.J., 'Loch Ness bathymetric and seismic survey', </p><p>The Scottish Naturalist 105 (1993), 23-43. </p></li><li><p>1078 points </p></li><li><p>https://bost.ocks.org/mike/simplify/ </p></li><li><p>contours.org.uk/bathymetry </p></li><li><p>These methods have given a new measure of mean </p><p>depth (102m, previously 87m), and a new measure of </p><p>volume (2.74km3, previously 2.32km3). </p><p>That additional volume is enough to cover </p><p>the personal use of every person </p><p>in Scotland for 1.5 years. </p></li><li><p>Philip Taylor | @ScienceAndMaps </p></li></ul>