Coastal Structure Inspection Technologies: Investigation of Multibeam Sonars for Coastal Structure Surveys

Prickett, Terri L.

doi:10.21236/ada345033

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Introduction and Problem Statement1

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2012

2024

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“…The accurate estimation of both the rock location and the top layer depth is a challenging task for rock dumping contractors (Prickett 1998). A ten-centimetre error like the one 308 N. Debese et al observed in Figure 1 is definitely not acceptable regarding the 0.27 m depth uncertainties fixed by the IHO at Special Order (IHO S44 2008).…”

Section: Introduction and Problem Statementmentioning

confidence: 98%

Qualitative and Quantitative Description of Multibeam Echosounder Systematic Errors on Rocky Areas

2012

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This paper deals with the problem of systematic depth errors made in surveying dumped rocks with multibeam echosounder. These errors may induce dangers for navigation in very shallow water areas or huge costs for coastal engineering contractors who perform rock dumping operation and surveying. We analyze results from four different multibeam echosounder systems and compare those data to a reference digital terrain model of a dumped rocks area obtained from a 3D terrestrial laser scanner. The systematic depth errors are statistically described and analysed on local areas. Finally, we propose a look-up table linking the error amplitude with the rock size, resulting from our error analysis.

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Section: Introduction and Problem Statementmentioning

confidence: 98%