Zoning Marine Disposal to Minimize Environmental Impacts for Dredged Material Management: A Case Study in Hai Phong Port Area, Vietnam

Lan Dinh Tran(Institute of Marine Environment and Resources/VAST; Graduate University of Science and Technology)
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)

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 unreused dredged materials. While all existing dumping sites in sea waters and onland 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 criteria of natural conditions, environment and socio-economics for zoning coastal waters of Hai Phong. These criteria were detailed into eight sub-criteria 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 zones for dredged material dumping in South, South West Hai Phong at depth below 15m to the deeper areas. Disposals of dredged materials in the zones would minimize impacts on the environment, ecology and socio-economics in surrounding waters and coastal areas. 


Keywords


MCOA; Marine dumping; Shipping channel; Sustainable criteria; Sustainable management;

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DOI: http://dx.doi.org/10.36956/sms.v1i2.141

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