Modelling of sedimentation processes inside Roseires Reservoir (Sudan)

Roseires Reservoir, located on the Blue Nile River in Sudan, is the first trap to the sediments coming from the vast upper river catchment in Ethiopia, which suffers from high erosion and desertification problems. The reservoir has already lost more than one-third of its storage capacity due to sedimentation in the last four decades. Appropriate...

Morphodynamic Upscaling with the MORFAC Approach in Tidal Conditions: The Critical MORFAC

A hampering factor in the application of morphodynamic models is the potential excessive time needed to complete a simulation. One way to upscale a model run is the use of a morphological factor, or MORFAC. In this paper, we investigate the upper limit to the value of the MORFAC as a function of model geometry and timestep for a schematized case...

Modelling of sedimentation processes inside Roseires Reservoir (Sudan) (discussion)

Discussion paper. Roseires Reservoir, located on the Blue Nile River, in Sudan, is the first trap to the sediments coming from the upper catchment in Ethiopia, which suffers from high erosion and desertification problems. The reservoir lost already more than one third of its 5 storage capacity due to sedimentation in the last four decades....

Zuiderzee is now called IJsselmeer: Process-based modeling

Constructing a closure dam such as Afsluitdijk causes an instantaneous change in tidal wave propagation and flow field in the basin which triggers extensive morphological changes in the adjacent tidal basin. These morphological changes may continue for centuries before the whole system reaches a new "equilibrium" state, which is different from...

Long-term process-based morphological modeling of large tidal basins

The morphology of tidal basins includes a wide range of features developing along different spatial and temporal scales. Examples are shoals, channels, banks, dunes and ripples. Coastal engineers use their engineering tools to answer questions on the processes governing the short term (< decades) development of these morphological features....

A probabilistic approach to investigate the effect of wave chorology on process-based morphological modelling

This paper demonstrates the sensitivity of morphological process-based models to the chronology of input wave conditions. In this research the effect of an emerged offshore breakwater on the morphology of the beach is investigated. A 30 day long morphological simulation with real time history of the wave (brute force - base case) is compared...

Climate change impacts on the stability of small tidal inlets: A numerical modelling study using Realistic Analogue approach

Tidal inlets are of great societal importance as they are often associated with ports and harbours, industry, tourism, recreation and prime waterfront real estate. Their behaviour is governed by the delicate balance of oceanic processes (tides, waves and mean sea level), and fluvial/estuarine processes (riverflow and heat fluxes), all of which...

Bed composition generation for morphodynamic modeling: Case study of San Pablo Bay in California, USA

Applications of process-based morphodynamic models are often constrained by limited availability of data on bed composition, which may have a considerable impact on the modeled morphodynamic development. One may even distinguish a period of “morphodynamic spin-up” in which the model generates the bed level according to some ill-defined initial...

Long-term morphological modeling of Marsdiep basin in the Dutch Wadden Sea, the Netherlands