Port Sediments as Carbon Sink and Source

Linking patterns of physical and chemical organic matter fractions to its lability in sediments of the tidal Elbe river

Degradability of organic matter in river sediments differs in relation to origin and age. In order to explain previously observed spatial patterns of organic matter degradability and stabilization, this study investigated sediment organic matter (SOM) properties along a tidal Elbe river transect using dissolved organic matter (DOM) fractions,...

Turnover of Suspended and Settled Organic Matter in Ports and Waterways

Organic matter plays a major role in global ecosystems and has several functions in terrestrial and marine environments. As organic matter impacts, among others, the rheological behaviour and settling rates of mineral sediment particles, it is of great relevance to the definition and maintenance of the nautical depth in ports and waterways. The...

Influence of Anaerobic Degradation of Organic Matter on the Rheological Properties of Cohesive Mud from Different European Ports

The presence of clay-organic flocs in cohesive mud results in a complex rheological behavior of mud, including viscoelasticity, shear-thinning, thixotropy and two-step yielding. In this study, the effect of microbial degradation of organic matter on the rheological properties of mud samples, collected from different ports, was examined. The mud...

Effects of organic matter degradation in cohesive sediment: Linking sediment rheology to spatio-temporal patterns of organic matter degradability

Purpose<br/>Sediment organic matter (SOM) influences settling and thus the rheological behavior of suspended particles by enhancing flocculation or reducing surface charges by forming organo-mineral complexes that facilitate particle–particle interactions in consolidating sediments. It was, therefore, assumed that the microbial degradation of...

Effect of organic matter degradation in cohesive sediment: A detailed rheological analysis

Purpose<br/>The presence of organic matter in cohesive sediment results in the formation of clay-organic flocs, which eventually impart complex rheological behavior including shear-thinning, viscoelasticity, thixotropy and two-step yielding to mud. In this study, the influence of microbial degradation of sediment organic matter on the...

Organic matter pools in sediments of the tidal Elbe river

Anaerobic sediment organic matter decay generates methane, delays sediment consolidation, reduces sediment density, viscosity and shear strength, all impacting the sediment rheological parameters and the navigable depth. This study quantifies the share of anaerobically and aerobically degradable sediment organic matter (SOM) in a depth...

Impact of organic matter on rheological behavior of fine-grained sediment

Controls on the effect of organic matter decay on sediment rheological properties

Spatial variability of organic matter degradability in tidal Elbe sediments

Purpose: The microbial turnover of sediment organic matter (OM) in ports and waterways impacts water quality, sonic depth finding and presumably also rheological properties as well as greenhouse gas emissions, especially if organic carbon is released as methane. As a consequence, sediment management practices as a whole are affected. This...

Spatial and temporal variability of the biological activity of tidal Elbe sediments in the Port of Hamburg

Rheological characterization of fluid mud in ports and waterways

One stop offshore wind turbine installation - Huisman Designs Wind Turbine Shuttle

Tuning the Exciton Binding Energies in Single Self-Assembled InGaAs/GaAs Quantum Dots by Piezoelectric-Induced Biaxial Stress

We study the effect of an external biaxial stress on the light emission of single InGaAs/GaAs(001) quantum dots placed onto piezoelectric actuators. With increasing compression, the emission blueshifts and the binding energies of the positive trion (X+) and biexciton (XX) relative to the neutral exciton (X) show a monotonic increase. This...

Capacity assessment of a cellular radio system using a narrowband multiuser detector

Human Factors Engineering in the Wheelhouse Design of High Speed Catamaran Ferry