Model of Estimating the Aquaculture Carrying Capacity for Shallow-Water Tidal Embayments. Model application to Ben Beo bay, Cat Ba island, Hai Phong

Abstracts: Model was developed to estimate the production carrying capacity of water bodies based on nutrient inputs from aquacultures, flushing rates and the risk of algal blooms for Shallow-Water Tidal Embayments. Model was applied to Ben Beo bay, Cat Ba island, Hai Phong.The calculations suggest that nutrient loadings from cage-culture practices in 2017 were greater than the carrying capacity of Ben Beo during low and average tidal exchange. The emission of nutrients by fish cultures in 2008 into water body was greater than the sustainable carrying capacity. The aquaculture production in Plan has not overcome Ben Beo’s carrying capacity even during low tidal exchange. However, during neap tide, carrying capacity has been able to overcome Keyword: Carrying capacity, nutrient, aquacultures

Maritime pollutants in shipping and commercial European ports based on relevant physical and biogeochemical environmental parameters (IUPAC Technical Report)

Ports are closed or semi-closed coastal systems with limited water circulation, poor flushing and weak tidal exchange. They are characterized as pollution hotspots or areas of stagnation with a variety of maritime pollutants. Nowadays, shipping and port managers aim to address environmental risk in their operations, striving to achieve suitable environmental management systems and environmental policies. In that way, environmental impacts are thoroughly considered, actions to minimize and prevent these effects are identified while human activities for prevention, reduction and mitigation of harmful consequences are managed. The current project provides details of quality and performance indicators, based on physical and biogeochemical environmental parameters required to monitor and audit the effectiveness of environmental management system and environmental policy applied in ports. These indicators will be used as powerful tools strengthening sound decisions when developing, shaping and evaluating national and local environmental management systems and policies. The selected indicators are described and their monitoring processes are presented and discussed. Examples of selected best environmental practice from various port authorities are included.