Investigating the Risk of Galveston's Proposed Floating Sector Gates Failing Under Reverse Loading Conditions

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Reducing hydraulic loads on river dikes by construction of longitudinal mounds of local soil

For the past 2000 years river training works have been performed on the Dutch rivers. These training works have shaped the river system of today. Another result of the river training works, especially over the last two centuries, is a decrease in biodiversity. To protect the biodiversity some floodplains in the Netherlands have been classified...

Modelling sediment and propagule pathways to improve mangrove rehabilitation: A case study of the pilot project in Demak, Indonesia

Mangrove forests are important (sub)tropical intertidal ecosystems providing coastal protection and other ecosystem services like carbon storage and biodiversity. In view of the loss of these forests many rehabilitation projects have started, but unfortunately these efforts often fail. A main cause for coastal erosion is a disrupted (fine)...

Sea level rise in the Oosterschelde estuary: A study of the long-term morphological development of a model of the Oosterschelde with accelerated sea level rise if the storm surge barrier is removed

The Oosterschelde has been an area of morphological change for centuries. Both floodings and human influences have caused the Oosterschelde to have its current shape. During the last century before implementation of the Delta plan (1953) the estuary was still expanding as the channels deepened and the tidal flats increased. With the construction...

Channel Network Morphodynamics in the Lower Paraná Delta: Modelling the Influence of Natural Processes and Anthropogenic Activities on Morphological Changes in the Lower Paraná Delta Channel Network

The La Plata Basin is the second largest drainage basin in South America. The Paraná River, the basin’s main river, discharges into the Río de la Plata estuary in Argentina. In the Lower Paraná Delta, near the deltaic front, a complex system of mostly natural and some man-made channels redistribute a part of the river flow. Like the river and...

Rehabilitating mangroves with a sediment nourishment: An initial assessment using a schematised model

Mangroves are productive ecosystems. Degradation of mangroves has been observed since the 1970s, due to a variety of reasons. Successful rehabilitation focuses on restoring conditions suitable for mangroves. Sediment availability has been shown to positively impact mangrove growth. Therefore, it can likely play a role in mangrove rehabilitation....

Morphodynamic Modelling of the Ameland Ebb-Tidal Delta: An Assessment of the 2018 - 2019 Pilot Nourishment

Ebb-tidal deltas play a key role in the morphology of barrier coastlines and tidal inlet systems as they serve as a natural source of sediment. They are typified by a dynamic morphology that interacts with the adjacent coastlines and sponsors a unique ecological habitat. Under increasing socio-economic, ecological and climate-induced constraints...

Stability of intertidal and subtidal areas after Delta21 plan: Evaluating the consequences for the morphological development produced by the interventaion

In recent years, there has been an increasing need for solutions against the threats that SLR and climate change represent for coastal systems, especially in low lying areas like the SW Dutch coast. Simultaneously, awareness of the impacts that human activities have on natural environments has surged. Integrated and sustainable solutions are...

Modelling of storm surge due to hurricanes in Mississippi (USA)

The existing hydrodynamic models consider full physics approaches to calculate storm surge at coastal regions. However, due to the complexity of the equations that model these processes, the computational time and power required to run them can be large, compared to models that consider simplified equations. By contrast, simplified hydraulic...

Modelling the influence of variability on the sediment dynamics in Canal Emilio Mitre: A study on the effect of climate, deepening and wind scenarios on a navigation channel through the Rio de la Plata estuary

Canal Emilio Mitre is a navigation channel that runs through the Rio de la Plata estuary in South America. It grants access to the second largest inland waterway system in South America, covering (parts of) Argentina, Uruguay, Brazil, Paraguay and Bolivia. The channel is a main bottleneck for navigation for two reasons; the channel has a...

The applicability of the mega nourishment concept for the purpose of combating erosion in Cua Dai beach

Nourishments are considered to be a popular soft measure against coastal erosion. In the Netherlands, the concept of a localized mega nourishment has been introduced as an innovative approach, aiming to counteract the anticipated enhanced coastal erosion. The positive results of the Sand Engine implementation lead the way for applying the mega...

Tidal energy generation in Kalpasar

In the future, two enormous challenges face humanity: decreasing the carbon emissions and supporting the growing energy demands in the developing regions of the world. These challenges highlight the need for a greater amount of implementation of renewable energy projects. This thesis tackles one such potential project, the modeling of a tidal...

Simulation of Nearshore Processes and Testing of Implicit and Explicit Vegetation Representations in SWAN

Using data made available by George Mason University (GMU), a U.S. university situated in Virginia. Field data is used to validate both a Delft 3D and SWAN standalone model. The paper not only shows the difference between the implicit manning roughness approach and the explicit cylindrical vegetation approach, but also provides a comparison...

Hydrodynamic modelling of roughness discontinuities

In this study the effect of a roughness discontinuity caused by a pipeline cover layer in the sea bed is investigated. As a result of this non-uniform flow configuration, the environmental forces acting on the pipeline cover layer change. To investigate the effect of roughness discontinuities, a numerical model of the flow is made; thereby...