Analyses of Pre-Dredged and Post-Dredged Sounding of Odidi Creek in Warri South, Delta State, Nigeria

International Journal of Geoinformatics and Geological Science

© 2019 by SSRG - IJGGS Journal

Volume 6 Issue 2

Year of Publication : 2019

Authors : Akwaowo U. Ekpa, Aniekan E. Eyoh

10.14445/23939206/IJGGS-V6I2P104

How to Cite?

Akwaowo U. Ekpa, Aniekan E. Eyoh, "Analyses of Pre-Dredged and Post-Dredged Sounding of Odidi Creek in Warri South, Delta State, Nigeria," SSRG International Journal of Geoinformatics and Geological Science, vol. 6,  no. 2, pp. 22-28, 2019. Crossref, https://doi.org/10.14445/23939206/IJGGS-V6I2P104

Abstract:

This study examines the volume of materials dredged and the depth required for safe navigation of vessels along Odidi creek in Warri South, Delta State, Nigeria. Pre-dredging and Post-dredging bathymetric survey were carried out by obtaining the followings: Mean Tide Level (MTL) of the creek; sounded depths and positioning using Hydrostar Elac 4300 dual frequency Echo Sounder and C-NAV 3050 GNSS respectively. The sounded depths were reduced to MTL datum. The area of the project and volume of materials were 26792.542m² and 52800.018m³ respectively, and bathymetric uncertainty of ±0.512m was obtained. Analysis of the post-dredged results showed that the area was over dredged by 1.35m after comparing the expected and the reduced average depths obtained. Bathymetric chart, contour map, 3D surface and Triangulated Irregular Network of the two data sets were produced. The result further revealed that creation of Under Keel Clearance Management System (UKCMS) to enhance quick accessibility to depth information on Nigerian Inland Water Ways was a prerequisite for safety to navigation.

Keywords:

Sounded Depths, Bathymetry, Pre-Dredging, Post-Dredging, Tidal Rivers, Creek, Under Keel Clearance, Chart, Triangulated Irregular Network.

References:

[1] M. O. Ekun, R. Ehigiator-Irughe and E. S. Okonofua “Determination of Area and Volume from Dredged Geodata Set”. Nigerian Journal of Technology (NIJOTECH) Vol. 35, No. 4, pp 707 -712, 2016.
[2] L. Hart and G. U. Victor “Assessment of Hydrographic Surveying in River Channel for Reclamation and its Implication for Cost Estimate of Dredged”. International Journal of Geography and Environmental Management ISSN 2504-8821 Vol. 4 No. 3, 2018.
[3] (2016) International Association of Dredging Companies. [Online]. Available:(hhtp://wiki.gis.com/wiki/index.php).
[4] S. Pat, Trends in Volume Calculations for Dredging Projects (2004). [Online]. Available:http://www.hypack.com,
[5] (2015) National Oceanic and Atmospheric Administrator, (NOAA) website.[Online].Available: http://oceanservice.noaa.gov/facts/dredging.html
[6] Available Website. [Online]. http://www.Marinegyaan.com