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dc.contributor.author Rathnayaka, KRHI
dc.contributor.author Ansanayaka, AGNJ
dc.contributor.author Piragash, C
dc.contributor.author Wickrama, MDMG
dc.contributor.author Senarathne, EN
dc.contributor.author Ratnayake, NP
dc.date.accessioned 2023-12-18T08:59:11Z
dc.date.available 2023-12-18T08:59:11Z
dc.date.issued 2023-08-28
dc.identifier.citation Rathnayaka, K.R.H.I., Ansanayaka, A.G.N.J., Piragash, C., Wickrama, M.D.M.G., Senarathne, E.N., & Ratnayake, N.P. (2023). Identification of the bedrock level with sub-bottom profiling data. In C.L. Jayawardena (Ed.), International Symposium on Earth Resources Management & Environment – ISERME 2023: Proceedings of the 7th international Symposium on Earth Resources Management & Environment (pp.77). Department of Earth Resources Engineering, University of Moratuwa. https://doi.org/10.31705/ISERME.2023.15
dc.identifier.uri http://dl.lib.uom.lk/handle/123/21959
dc.description.abstract This study dominantly inquiries about the accuracy of the interpretation of sub-bottom profiling data for the identification of the bedrock level that is essential for underwater constructions and other marine activities. Although the physical core samples give the data more accurately, it is expensive and time-consuming. It stimulates the inspection of alternative methods such as sub-bottom profiling. A boomer profiler has been used in this study for the data collection from the north and west sides of the Colombo harbour in Sri Lanka with a 1 kHz frequency. The acquired data were processed using the SonarWiz software and visual identification was employed for the layer identification. The borehole data were utilised for the validation of the results and standard penetration test (SPT) values were crucial while concluding due to most interpretations showing the bedrock level from SPT-50 level with its stiffness. Re-sedimentation is an error occurring during the borehole investigation. Apart from that, equipment failures can be occur during the seismic survey. According to the interpretation, the bedrock level reflection signature is often associated with the SPT-50 level. However, deviations occur due to factors like layer thickness and absolute bedrock presence. To improve the accuracy of interpretation, various frequencies and different types of bedrock can be considered. en_US
dc.language.iso en en_US
dc.publisher Department of Earth Resources Engineering en_US
dc.subject Acoustic impedance en_US
dc.subject Filtering en_US
dc.subject Seabed en_US
dc.subject SPT value en_US
dc.subject SonarWiz en_US
dc.title Identification of the bedrock level with sub-bottom profiling data en_US
dc.type Conference-Abstract en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Earth Resources Engineering en_US
dc.identifier.year 2023 en_US
dc.identifier.conference International Symposium on Earth Resources Management & Environment - ISERME 2023 en_US
dc.identifier.place Colombo en_US
dc.identifier.pgnos pp. 77 en_US
dc.identifier.proceeding Proceedings of the 7th International Symposium on Earth Resources Management & Environment en_US
dc.identifier.email maheshwari@uom.lk en_US
dc.identifier.doi https://doi.org/10.31705/ISERME.2023.15 en_US


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