Analysing the changes in the bathymetry of Saldanha Bay between the years 1977 and 2021
Date
2022-12
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Publisher
CONSAS Conference
Abstract
The construction of the Saldanha Port has been the reason for the major changes in the bathymetry and sediment dynamics observed in Saldanha Bay in the last decades. In this paper, newly acquired soundings from the National Hydrographer were used to analyse the changes between 1977 and 2021 - over a 44-year period - in the bathymetry of Saldanha Bay. The Ordinary Kriging (OK) interpolation method, available through the Geostatistical Wizard in ArcGIS Pro, was used for creating surface models to conduct comparisons with the bathymetry of Saldanha Bay. The results indicate a general increase in depth since 1977 of between 0.395 and 3.203 m, and an average increase in depth within the Big Bay of 1.799 m. Between 1977 and 2021, a total volume loss of 49 364 560.0 m3 in sediment was calculated - an indication of how the sedimentation process in Saldanha Bay has changed subsequent to the construction of the harbour.
Description
The original publication is available at: http://www.sajg.org.za/index.php/sajg/article/view/1005
The Masters degree for this article is available at http://hdl.handle.net/10019.1/125078
The Masters degree for this article is available at http://hdl.handle.net/10019.1/125078
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Citation
Du Toit, L. et al. 2022. Analysing the changes in the bathymetry of Saldanha Bay between the years 1977 and 2021. South African Journal of Geomatics 11(2):15 pages. doi.10.4314/sajg.v11i2.11