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A framework for integrated flood risk management
Little of the European coast line or land area has escaped human influence, with increasing pressures over generationsof settlement, agriculture, industry and commerce. The pressures include water and flood management activities whichcontrol the extent and frequency of floods and the drainage of water from the land. Internationally, policies and practicein flood risk management are evolving in response to many drivers. See www.floodsite.net.
Stability of breakwater roundheads during construction
The presented study focussed on issues related to the hydraulic stability during the construction of rubble mound breakwaters. During construction the temporary roundheads differ from the roundheads in the final stage. Often a submerged uncompleted part of the breakwater is present in front of the section that reached its final crest elevation. Three-dimensional physical model tests were performed to analyse the influence of the submerged part on the stability of the emerged part.
Storm surge modelling in the South China Sea
Sea level anomalies (SLA) due to different phenomena have been observed in various parts of the South China Sea (SCS). Excluding tsunamis, the largest anomalies are classified as storm surges. Storm surges in the most southwestern part of the SCS are associated with a strong persistent wind blowing along the longest axis of the sea, roughly passing through Taiwan and Singapore.
Oblique wave attack on cube and rock armoured rubble mound breakwaters
Stability formulae for armour layers of rubble mound breakwaters are usually being applied assuming perpendicular wave attack. Often it is assumed that for oblique wave attack the reduction in damage compared to perpendicular wave attack is small. This seems however a very conservative assumption. Wave basin tests at Deltares provide information to assess the effects of oblique waves on the stability of rock slopes and cube armoured rubble mound breakwaters.
Updated Abraham solvation parameters for polychlorinated biphenyls
An updated set of PCB solvation parameters was derived from four PCB properties and associated Abraham solvation equations.
Model error prediction using neural networks combined with chaos theory
This paper presents a time series prediction scheme using time-delay neural networks combined with chaos theory. To achieve reliable multi-step-ahead prediction, the optimal architecture of networks is determined by average mutual information and false nearest neighbours analyses in chaos theory. The resulted networks are applied to predict the model errors at 4 tidal stations in the Singapore Regional Model domain, with 5 prediction horizons ranging from 2 hours to 96 hours.
Free slip plane analysis of a strip footing using a genetic algorithm
A strip footing is a uniform load with infinite length in the third dimension. The safety of sucha load has been subject of investigation for a quite a long time. By ignoring the weight and internal friction ofthe soil, a number of upper- and lower bounds can be derived for the bearing capacity. This paper presents anupper bound method that gives the same result as the lower bound. In other words, the exact bearing capacityis derived. Even though the algorithm used is presented on a basic case, any geometry and subsoil configuration can be analyzed.
The Rhine delta : a record of sediment trapping over time scales from millennia to decades
Dissolved organic nitrogen dynamics in the North Sea : a time series analysis (1995-2005)
Dissolved organic nitrogen (DON) dynamics in the North Sea was explored by means of long-term time series of nitrogen parameters from the Dutch national monitoring program. Generally, the data quality was good with little missing data points. Different imputation methods were used to verify the robustness of the patterns against these missing data. No long-term trends in DON concentrations were found over the sampling period (1995e2005).
Coastal bio-geomorphology modeling : linking processes and scales