Sustainable Marine Structures

Zoning Marine Disposal for Dredged Material Management: A Case Study in Vietnam

Do Gia Khanh

Hai Phong Department of Science and Technology；Graduate University of Science and Technology

Do Thi Thu Huong

Institute of Marine Environment and Resources/VAST

Vu Duy Vinh

Institute of Marine Environment and Resources/VAST

Tran Dinh Lan

Institute of Marine Environment and Resources/VAST;Graduate University of Science and Technology

DOI: https://doi.org/10.36956/sms.v1i2.141

---

Abstract

The fast growth of Hai Phong ports in the two last decades requires not only their upgrading facilities but also expanding port area and dredging their shipping channels (existing and new ones) that generate a huge amount of unused dredged materials. While all existing dumping sites in sea waters and on land get over capacity, looking for new dumping sites in sea waters is an urgent need. This study is to zone coastal waters of Hai Phong for suitable dumping sites meeting sustainable coastal management. Multi-criteria overlay analysis on GIS platform was employed with the
criteria of natural conditions, environment and socio-economics for zoning coastal waters of Hai Phong. These criteria were detailed into eight subcriteria and then developed to eight GIS weighted thematic sub-layers of bottom depth, litho-hydrodynamics, ecosystems, distribution of benthos, distance to residential areas and tourist sites, distance to aquaculture area, distance to ecosystems and distance to conservation areas. Analysis results
show the highly suitable zone for dredged material dumping in South, South West Hai Phong at depth below 15m to the deeper areas. Disposals of dredged materials in the zone would minimize impacts on the environment, ecology and socio-economics in surrounding waters and coastal areas

Keywords: MCOA; Marine dumping; Shipping channel; Sustainable criteria; Environmental impacts; Hai Phong ports

---

References

[1] Chih-Feng Chen, Chiu-Wen Chen, Chih-Ming Kao, Cheng-Di Dong. Impact of disposal of dredged material on sediment quality in the Kaohsiung Ocean Dredged Material Disposal Site, Taiwan. Chemosphere, 2018, 191: 555-565.

[2] Claudia Copeland. Ocean Dumping Act: A summary of the Law. Congressional Research Service 7-5700, RS20028, 2016. www.crs.gov .

[3] Duy Vinh V., Ouillon S. Van Uu D. Estuarine Turbidity Maxima and Variations of Aggregate Parameters in the Cam-Nam Trieu Estuary, North Vietnam, in Early Wet Season. Water, 2018, 10(68).

[4] Environment and Climate Change Canada. Canadian Environmental Sustainability Indicators: Monitoring disposal at sea. Consulted on Month day, year, 2017. Available at: https://www.canada.ca/en/environment-climate-change/services/environmental-indicators/monitoring-disposal-at-sea.html

[5] Gi Hoon Hong, Suk Hyun Kim, Burton C Suedel Joan U Clarke and Jongbum Kim, 2009. A Decision-Analysis Approach for Contaminated Dredged Material Management in South Korea. Integrated Environmental Assessment and Management, 2009, 6(1): 72-82.

[6] Harold A. Limestone, Murray Turnoff (edt.). The Delphi Method Techniques and Applications. Portland State University and New Jersey Institute of Technology, 2002: 618.

[7] Imtiaz Ahmed Chandio, Abd Nasir B. Matori, Khamaruzaman B. WanYusof, Mir Aftab Hussain

[8] Talpur, Abdul-Lateef Balogun, Damo Umar Lawal. GIS-based analytic hierarchy process as a multi-criteria decision analysis instrument: a review. Arab J Geosci,2013, 6: 3059-3066.

[9] Kalo Pakoa, Kim Friedman, Bradley Moore, Emmanuel Tardy and Ian Bertram. Assessing Tropical Marine Invertebrates: a Manual for Pacific Island Resource Managers. Secretariat of the Pacific Community headquarters Noumea, New Caledonia, 2014: 118.

[10] McCook, L.J., Schaffelke, B., Apte, S.C., Brinkman, R., Brodie, J., Erftemeijer, P., Eyre, B., Hoogerwerf, F., Irvine, I., Jones, R., King, B., Marsh, H., Masini, R., Morton, R., Pitcher, R., Rasheed, M., Sheaves, M., Symonds, A., Warne, M.St.J. Synthesis of current knowledge of the biophysical impacts of dredging and disposal on the Great Barrier Reef: Report of an Independent Panel of Experts. Great Barrier Reef Marine Park Authority, Townsville, 2015.

[11] Ministry of Natural Resources and Environment (Vietnam). National Technical Regulations for Marine Water Quality (QCVN 10-MT:2015/BTNMT), 2015.

[12] Ministry of Natural Resources and Environment (Vietnam). National Technical Regulations for Sediment Quality (QCVN 43-MT:2017/BTNMT), 2017.

[13] Saaty, T.L. Decision making with the analytic hierarchy process. Int J Serv Sci., 2008, 1(1): 83-98.

[14] Sabine Elisabeth Apitz. Waste or resource Classifying and scoring dredged material management strategies in terms of the waste hierarchy. J. Soils Sediments, 2010, 10: 1657-1668.

[15] Samantha Paredes, Sean Pascoe, Louisa Coglan, Sarah Jennings, Satoshi Yamazakic and James Innesa. At-sea dumping of dredge spoil: an overview of the Australian policy and legislative framework. Australasian Journal of Environmental Management, 2017, 24(2): 184-199.

[16] Tran Duc Thanh (Ed.), Bui Quang San, Nguyen Van Can, Tran Dinh Lan, Nguyen Van Quan, Luu Van Dieu, Nguyen Thi Thu, Tran Anh Tu, Nguyen Thi Kim Anh, 2015. Nature and environment on the coast of Hai Phong. Publishing House of Natural Sciences and Technology, Hanoi, 2015: 310. (in Vietnamese).

[17] U.S Army Corps of Engineers, 2017. Preliminary Assessment Dredged Material Management Plan for San Juan Harbor Puerto Rico. San Juan Harbor Puerto Rico Navigation Project, 2017: 21.

[18] Vu Duy Vinh, Tran Dinh Lan. Impact of the wave climate conditions on sediment transport and morphological change in the Hai Phong coastal area. J. Marine Science and Technology, 2018, 18(1): 10-28. DOI: https://doi.org/10.15625/1859-3097/14/2/4475

[19] Vu Duy Vinh, Tran Duc Thanh. Application of the numerical model to study on maximum turbidity zones in Bach Dang estuary. Journal of Marine Science and Technology, 2012, 3: 1-12. DOI: https://doi.org/10.36956/sms.v1i2.141