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Corresponding Author

Radwa Mohamed Refaat

Subject Area

Civil and Environmental Engineering

Article Type

Original Study

Abstract

An accurate bathymetric survey is a principal issue in dredging projects because it has a direct impact on the estimated dredging quantities, project process and cost. In this research, various factors affecting the accuracy of bathymetric survey and hence dredging volume quantities have been investigated. The data obtained from single-beam echo sounder surveys after the deepening and widening of Great Bitter Lakes in the New Suez Canal project, which was recently carried out in Egypt, have been used.

The ship motion, data density, and processing software are the factors investigated that affect the accuracy of bathymetric survey. The effect of those factors had been tested during data processing using different hydrographic software packages. Results showed that due to the calm surface in Suez Canal during the survey, heave, pitch and roll effects are insignificant in volume computations. It has been proved that data density (line spacing) has an influential effect on volume estimation, where the closer the line spacing (increased data density), the lower the uncertainty. It has been also found that using different volume calculation software based on different Digital Terrain models may cause differences in the resulting estimated volume.

Keywords

Volume Computations, Single-Beam Survey, Quality Control, Quality Assurance, Civil 3D, ARC GIS, New Suez Canal

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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