Underwater Acoustics and Depth Uncertainties In the Tropics

Authors

  • O. Anejionu Department of Geoinformatics and Surveying, University of Nigeria Enugu Campus, Enugu State, Nigeria
  • O. Ojinnaka Department of Geoinformatics and Surveying, University of Nigeria Enugu Campus, Enugu State, Nigeria

Abstract

Acoustic velocity is known to vary with temperature, depth and salinity (TDS). Calibration of acoustic systems is required at the beginning and end (and sometimes midway) of each hydrographic operation, in order to correct for these velocity variations. Estuarine waters in the tropics were investigated employing wide combinations of temperature, depth and salinity to verify the relationships between these parameters and the acoustic velocity. A maximum error in depth of 0.2m was obtained. Consequently, in the absence of other sources of errors, acoustic systems may need to be calibrated only once in the cause of a full day bathymetric survey operation in the tropics.

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Published

2011-01-01

How to Cite

Anejionu, O., & Ojinnaka, O. (2011). Underwater Acoustics and Depth Uncertainties In the Tropics. The International Hydrographic Review, (5). Retrieved from https://journals.lib.unb.ca/index.php/ihr/article/view/20874

Issue

Number 5 (2011)

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Articles

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 Anders, F.J. and Byrnes, M.R.(1991). “Accuracy of shoreline change rates as determined from maps and aerial photographs”, Shore and Beach, 59, pp. 17-26.

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Foley, J.D., van Dam, A., Feiner, S. K. and Hughes, J.F. (1990), Computer Graphics – Principles and Practice, 2nd ed., Addison-Wesley, Reading, MA.

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Smith, A. (1988). Colour photomapping. Report NRC-01-512. National Research Centre. Ottawa, Canada.

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desJardins, M. (2005). How to succeed in postgraduate  study, Applied Ecology Research Group, University of Canberra, viewed 26 April 2009, http://aerg.canberra.edu.au/jardins.t.htm.

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