Sediment pollution and accumulation in harbours are major environmental issues and studies that advance their solutions are essential for harbour sustainability. This book provides the first comprehensive assessment of chemical pollution in sediments and sediment accumulation rates in the tropical Tema Harbour (Ghana). This book contributes to improving our ability to use an integrated approach involving sediment chemistry and bioassays in one comprehensive assessment of the contamination state of a tropical coastal environment. Whole-sediment toxicity bioassays using the amphipod Corophium volutator and the polychaete Hediste diversicolor as bioindicators were combined with data on concentrations of total metal and metal binding forms, radionuclides, organochlorine pesticides and polycyclic aromatic hydrocarbons in bottom sediments as well as total metal concentrations in settling silt-clay particles collected by sediment traps to characterise the hazard, risk and impact of sediments from the tropical coastal Tema Harbour.
Chapter 1 - General Introduction
1.1. Background of this study
1.2. Research approach
1.3. Structure of this thesis
Chapter 2 - Literature Review
2.1. Chemical pollution in coastal marine environments
2.2. Types and effects of chemical pollutants in coastal marine environments
2.3. Sources of chemical pollutants in coastal marine environments
2.4. Fate of chemical pollutants in coastal marine environments
2.5. Assessment of chemical pollution in coastal marine environments
2.6. Sedimentation in harbours
Chapter 3 - Radioactivity Concentrations and their Radiological Significance in Sediments of the Tema Harbour (Greater Accra, Ghana)
3.2. Materials and Methods
3.3. Results and discussion
Chapter 4 - Assessment of DDT, HCH and PAH Contamination and Associated Ecotoxicological Risks in Surface Sediments of Coastal Tema Harbour (Ghana)
4.2. Materials and methods
Chapter 5 - Metal Distribution and Fractionation in Surface Sediments of Coastal Tema Harbour (Ghana) and its Ecological Implications
5.2. Materials and methods
Chapter 6 - Integrated Hazard, Risk and Impact Assessment of Tropical Marine Sediments from Tema Harbour (Ghana)
6.2. Materials and methods
Chapter 7 - Settling Fluxes and Sediment Accumulation Rates by the Combined Use of Sediment Traps and Sediment Cores in Tema Harbour (Ghana)
7.2. Materials and methods
7.3. Results and discussion
Chapter 8 - Settling Fluxes and Ecotoxicological Risk Assessment of Fine Sedimentary Metals in Tema Harbour (Ghana)
8.2. Materials and methods
Chapter 9 - General discussion and conclusions
9.1. Sediment pollution and accumulation in habours
9.2. General conclusions
IHE Delft PhD programme leads to a deepening of a field of specialisation. PhD fellows do scientific research, often with conclusions that directly influence their region. At IHE Delft, PhD researchers from around the world participate in problem-focused and solution-oriented research on development issues, resulting in an inspiring research environment. PhD fellows work together with other researchers from many countries dealing with topics related to water and the environment.
PhD research is often carried out in the ‘sandwich’ model. Preparation and final reporting – the first and last portion of the programme – are carried out in Delft, while actual research is done in the fellow’s home country, under co-supervision of a local institute. Regular contacts with the promotor are maintained through visits and long-distance communication. This enables researchers to employ solutions directly to problems in their geographical region.
IHE Delft PhD degrees are awarded jointly with a university. The degrees are highly valued and fully recognised in all parts of the world.