Precision Bathymetric Survey for Marine Infrastructure: A Case Study of Bullnose Jetty, Lagos, Nigeria

Authors

  • Alfred Sunday Alademomi Department of Surveying and Geoinformatics, Faculty of Engineering, University of Lagos, P.M.B. 12003, Akoka, Lagos State, Nigeria Nigeria
  • Joseph Olayemi Odumosu Department of Geomatics, Faculty of Environmental Sciences, University of Benin, P.M.B. 1154, Edo State, Nigeria. Nigeria
  • Stephen Olushola Oladosu University of Benin, Benin City, Nigeria Nigeria

Abstract

The bathymetric survey conducted at Bullnose Jetty, Apapa, Lagos, was an essential preparatory step for ongoing piling and repair activities. This study focused on evaluating seabed conditions along the quay-line to ensure safe engineering practices. Key objectives included the determination of seabed depth relative to average water levels, probing of proposed pile points (A-38_new, A-39_new, A-40_new) for clearance from debris, and identifying the location of a broken pile (A-39). The survey employed advanced equipment, including the South Echo-sounder and GNSS receiver, following systematic methodologies such as vertical accuracy checks, sounding route planning, and echo-sounding operations and videography. Depth measurements were calculated using acoustic signal travel times, with corrections for tidal variations and instrument lag. The 0.1 m grid interval used provided high-resolution data acquisition for the precise mapping of underwater conditions. Findings confirmed the absence of obstructive debris at proposed pile locations and identified the exact position of the broken pile to prevent any interference with repair works. This study showed and recommend the importance of detailed underwater assessments in maintaining marine infrastructure.

Keywords:

Bullnose jetty, Bathymetry, Depth, Pilling, Positioning

Author Biography

  • Stephen Olushola Oladosu, University of Benin, Benin City, Nigeria
    Dr. S. O. Oladosu is a Senior Lecturer at the Department of Geomatics, Faculty of Environmental Sciences, University of Benin, Nigeria.

References

A. E. Owoputi & O. O. Owoputi (2019). Examine the impact of inland waterways transportation on socio-economic development of Ogun State coastal area of Nigeria. FUPRE Journal of Scientific and Industrial Research, 3(2).

S. Pascoe, S. Paredes, & L. Coglan (2023). The indirect economic contribution of fisheries to coastal communities through tourism. Fishes, 8(3), 138. https://doi.org/10.3390/fishes8030138

S. O. Oladosu, A. S. Alademomi, T. J. Salami, & T. Y. Muhammad (2023). Integrated hydrographic survey for proposed jetty location along Benin River at Oghara, Delta State, Nigeria. Arabian Journal of Geosciences, 16(4), 284. https://doi.org/10.1007/s12517-023-11377-2

P. Gkeka-Serpetsidaki, G. Skiniti, S. Tournaki, & T. Tsoutsos (2024). A review of the sustainable siting of offshore wind farms. Sustainability, 16(14), 6036. https://doi.org/10.3390/su16146036

E. Barianaki, S. S. Kyvelou, & D. G. Ierapetritis (2024). How to incorporate cultural values and heritage in maritime spatial planning: A systematic review. Heritage, 7(1), 380-411. https://doi.org/10.3390/heritage7010019

C. Rajaram & P. K. Ramancharla (2014). Vulnerability assessment of coastal structure: A study on port buildings. International Journal of Education and Applied Research, 4(Spl-2), 8-15.

Y. Tu (2025). Intelligent Operation of Hydraulic Structures. In: Management of Hydropower Enterprises. Water Resources Development and Management. Springer, Singapore. https://doi.org/10.1007/978-981-97-5584-4_7

R. R. Elizalde (2024). Underwater Inspection of Submerged Elements in Masonry Bridges and Other Old Civil Structures Using Drones. Buildings, 14(9), 2788. https://doi.org/10.3390/buildings14092788

R. Kido, T. Inoue, M. Hatono, & K. Yamanoi (2023). Assessing the impact of climate change on sediment discharge using a large ensemble rainfall dataset in Pekerebetsu River basin, Hokkaido. Progress in Earth and Planetary Science, 10, 54. https://doi.org/10.1186/s40645-023-00580-0

Ö. Ugurlu, E. Kose, U. Yildirim, & E. Yuksekyildiz (2014). Marine accident analysis for collision and grounding in oil tanker using FTA method. Maritime Policy and Management. https://doi.org/10.1080/03088839.2013.856524

W.-K. K. Hsu (2015). Assessing the safety factors of ship berthing operations. Journal of Navigation, 68(3), 576–588. https://doi.org/10.1017/S0373463314000861

R. Fiene (2024). Regulatory compliance and monitoring systems: Regulatory science applied to regulatory administration (4th ed.). Elizabethtown, PA: Research Institute for Key Indicators.

M. H. P. António, E. H. Fernandes, & J. H. Muelbert (2020). Impact of jetty configuration changes on the hydrodynamics of the subtropical Patos Lagoon estuary, Brazil. Water, 12(11), 3197. https://doi.org/10.3390/w12113197

L. F. Rincon, Y. M. Moscoso, A. E. A. Hamami, J. C. Matos, & E. Bastidas-Arteaga (2024). Degradation models and maintenance strategies for reinforced concrete structures in coastal environments under climate change: A review. Buildings, 14(3), 562. https://doi.org/10.3390/buildings14030562

O. T. Badejo & G. K. Adewuyi (2019). Bathymetric survey and topography changes investigation of part of Badagry Creek and Yewa River, Lagos State, Southwest Nigeria. Journal of Geography, Environment and Earth Science International, 22(4), 1-16. https://doi.org/10.9734/jgeesi/2019/v22i430153

D. S. Mundhe & S. A. Rasal (2023). Depiction of damage mechanism and deteriorating pattern of concrete jetty structure in marine environment: A literature review. Journal of Emerging Technologies and Innovative Research, 10(6), 150-155. Retrieved from https://www.jetir.org

Trevi (2014). Rehabilitation of Bullnose jetty, Apapa Port, Lagos State. Retrieved December 24, 2024, from https://www.trevispa.com/downloads/4205/1612

Downloads

Additional Files

Published

03/17/2026

Issue

Vol. 11 No. 1 (2026): INFRASTRUCTURE AND ENVIRONMENTAL PRODUCTS

Section

Articles

License

The initial copyright of a paper is held by the authors (or their employer, in some instances). When publishing that paper the copyright may continue to be held by the author, or can be licensed or transferred to the publisher.

DOAJ recommends that journals allow authors to retain the copyright of their papers without restrictions. Authors will then grant the publisher the right of first publication, and other non-exclusive publishing rights.

Even when the author retains copyright, restrictions may sometimes be imposed by the publisher:

  • The publisher requires exclusive publishing rights. This means that the author no longer holds copyright without restrictions.
  • The publisher requires a transfer or exclusive license of commercial rights. This means the author no longer holds copyright without restrictions.

Submission of a manuscript implies that the submitted work has not previously been published (except as part of a thesis, report, or abstract); that it is not currently under consideration for publication elsewhere; and that its publication has been approved by all co-authors.

We need publishing rights from you in order to publish and make available an article. As a result, we require authors who publish in Sriwijaya journal of Environment to sign an author contract, which grants us the necessary publishing rights. This will occur after your manuscript has been peer-reviewed, accepted, and moved into production. Our Production team will then send you an email with all of the details. https://creativecommons.org/licenses/by-nc-sa/4.0/