Maintenance dredging: allowable limit for dredge volume differences using SBES and MBES datasets / Raiz Razali

In order to ensure channel clearances based on final dredging level are valid, sounding works are required to be used. The dredge volume being excavated is computed using sounding datasets. Although multi-beam echo sounders (MBES) are widely used today because of high-density data, single-beam echo...

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Main Author:	Razali, Raiz
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TC Hydraulic engineering Ocean engineering Technical hydraulics
Online Access:	https://ir.uitm.edu.my/id/eprint/27356/1/TM_RAIZ%20RAZALI%20AP%2017_5.pdf
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id	my-uitm-ir.27356
record_format	uketd_dc
spelling	my-uitm-ir.273562020-01-21T04:04:49Z Maintenance dredging: allowable limit for dredge volume differences using SBES and MBES datasets / Raiz Razali 2017 Razali, Raiz TC Hydraulic engineering. Ocean engineering Technical hydraulics In order to ensure channel clearances based on final dredging level are valid, sounding works are required to be used. The dredge volume being excavated is computed using sounding datasets. Although multi-beam echo sounders (MBES) are widely used today because of high-density data, single-beam echo sounders (SBES) are still relevant to be used to calculate dredge volume up to this date. As different hardware generates different data trends and distributions, different software uses various algorithms to calculate dredge volume and also due to different gridding sizes, it can be expected that the results with varying amounts of dredge volume will be generated. However, there is no thorough study on the magnitude of differences in dredge volume that can be established as an allowable limit. Although there are standards that can be used as a guideline, the applicable allowable limit is rarely discussed. This study aims to establish the allowable limit between SBES and MBES in terms of dredge volume calculation. Dredge volume calculation by various methods using different software, which are surface to datum, surface to surface and cross sections generated from SBES and MBES raw dataset, were compared. Five spatial interpolation methods which are inverse distance weighted (IDW), global polynomial interpolation, local interpolation polynomial, radial basis function (RBF), and ordinary kriging were used to grid the area before performing dredge volume computations. The comparative study of dredge volume differences were analyzed to justify the numerical limits in terms of total volumes generated by variable grid sizes, data distributions, cross sections, software, and spatial interpolations based on statistical analysis. The standard deviation result shows that using the allowable level of different limits, the percentage of dredge volume generated in between ± 0.5 to ± 1%. 2017 Thesis https://ir.uitm.edu.my/id/eprint/27356/ https://ir.uitm.edu.my/id/eprint/27356/1/TM_RAIZ%20RAZALI%20AP%2017_5.pdf text en public masters Universiti Teknologi MARA Faculty of Architecture, Planning and Surveying
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
topic	TC Hydraulic engineering Ocean engineering Technical hydraulics
spellingShingle	TC Hydraulic engineering Ocean engineering Technical hydraulics Razali, Raiz Maintenance dredging: allowable limit for dredge volume differences using SBES and MBES datasets / Raiz Razali
description	In order to ensure channel clearances based on final dredging level are valid, sounding works are required to be used. The dredge volume being excavated is computed using sounding datasets. Although multi-beam echo sounders (MBES) are widely used today because of high-density data, single-beam echo sounders (SBES) are still relevant to be used to calculate dredge volume up to this date. As different hardware generates different data trends and distributions, different software uses various algorithms to calculate dredge volume and also due to different gridding sizes, it can be expected that the results with varying amounts of dredge volume will be generated. However, there is no thorough study on the magnitude of differences in dredge volume that can be established as an allowable limit. Although there are standards that can be used as a guideline, the applicable allowable limit is rarely discussed. This study aims to establish the allowable limit between SBES and MBES in terms of dredge volume calculation. Dredge volume calculation by various methods using different software, which are surface to datum, surface to surface and cross sections generated from SBES and MBES raw dataset, were compared. Five spatial interpolation methods which are inverse distance weighted (IDW), global polynomial interpolation, local interpolation polynomial, radial basis function (RBF), and ordinary kriging were used to grid the area before performing dredge volume computations. The comparative study of dredge volume differences were analyzed to justify the numerical limits in terms of total volumes generated by variable grid sizes, data distributions, cross sections, software, and spatial interpolations based on statistical analysis. The standard deviation result shows that using the allowable level of different limits, the percentage of dredge volume generated in between ± 0.5 to ± 1%.
format	Thesis
qualification_level	Master's degree
author	Razali, Raiz
author_facet	Razali, Raiz
author_sort	Razali, Raiz
title	Maintenance dredging: allowable limit for dredge volume differences using SBES and MBES datasets / Raiz Razali
title_short	Maintenance dredging: allowable limit for dredge volume differences using SBES and MBES datasets / Raiz Razali
title_full	Maintenance dredging: allowable limit for dredge volume differences using SBES and MBES datasets / Raiz Razali
title_fullStr	Maintenance dredging: allowable limit for dredge volume differences using SBES and MBES datasets / Raiz Razali
title_full_unstemmed	Maintenance dredging: allowable limit for dredge volume differences using SBES and MBES datasets / Raiz Razali
title_sort	maintenance dredging: allowable limit for dredge volume differences using sbes and mbes datasets / raiz razali
granting_institution	Universiti Teknologi MARA
granting_department	Faculty of Architecture, Planning and Surveying
publishDate	2017
url	https://ir.uitm.edu.my/id/eprint/27356/1/TM_RAIZ%20RAZALI%20AP%2017_5.pdf
_version_	1783733956129062912

Maintenance dredging: allowable limit for dredge volume differences using SBES and MBES datasets / Raiz Razali

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