Modelling and Assessment of Coastal Changes at Golspie Beach, Scotland, UK; An Integration of Terrestrial Laser Scanning and Digital Photogrammetric Techniques, for an Effective Coastal Land use Management

Authors

  • Brown Joshua MSc  Department of Geospatial and Mapping Sciences, University of Glasgow, Scotland
  • Chimezie F Igwe  Department of Geography and Environmental Management, University of Port Harcourt, Rivers State
  • Adekunle I. A  School of Environmental Technology, Rivers State Polytechnic, Bori, Rivers State, Nigeria

Keywords:

Coastal change, Terrestrial Laser Scanning, Digital Photogrammetry, DTMs

Abstract

Coastal environments globally are recognised for their highly dynamic and unstable nature. The twin processes of erosion and accretion are constantly changing the face of the coastal environments. The Golspie beach situated in Sutherland, Highlands of Scotland is not spared from these processes which have been attributed to natural and anthropogenic factors. To minimise the effects of the rampaging erosions, beach sand feeding has been proposed to protect a section of the beach. To evaluate the success of the proposed project a high resolution digital terrain model (DTM) of the current position of beach in 2014 was necessary. This was achieved with the use of terrestrial laser scanning technique to acquire highly dense point cloud with a 5cm point spacing or resolution over a 1km length of beach. As part of the aims of this study the changes in the beach between 2013 to 2014 was assessed using photogrammetrically generated DTM from 2013 aerial photographs and DTMs of 2014 from terrestrial laser scanning techniques. These DTMs were used to assess the height and volumetric changes at the study area. The results from the change analysis revealed areas with significant loss and gains in height. Some sections were observed to have experienced height loss of approximately 0.25m to 1.5m especially around the frontage of the south end of the golf course and a section at the frontage of the Kart track. However the trend of height change recorded revealed more of gains than losses. From the volumetric analysis performed the areas with losses in sediments were highlighted. A total change of approximately 30,129.4m3 in sediment volume of the entire study area was recorded out of which the loss and gain represents 30% and 70% respectively. Overall a net gain of approximately 11,929.6m3 was recorded from the sediment budget of the entire beach with a southward movement of these sediments. The general outcome from the study revealed the success of using both techniques in beach studies, as all the aims and objectives of the study was achieved.

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International Journal of Scientific Research in Science and Technology

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Published

2017-12-31

Issue

Volume 2, Issue 3, May-June-2016

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Research Articles

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[1]
Brown Joshua MSc, Chimezie F Igwe, Adekunle I. A, " Modelling and Assessment of Coastal Changes at Golspie Beach, Scotland, UK; An Integration of Terrestrial Laser Scanning and Digital Photogrammetric Techniques, for an Effective Coastal Land use Management, International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011, Volume 2, Issue 3, pp.361-371, May-June-2016.