Merging criteria for the definition of a local pore and the CSD computation of granular materials: (Paper and Abstract)

Granular filters are materials used to avoid mass transport under seepage flow. They are installed in zoned dams or on the downstream slope of levees to prevent the wash out of soil particles through the core of the earth structures or through its foundation. This migration is stopped if the particles are blocked on their pathway by a...

Probabilistic Methodology for Seismic Deformation Assessment of Slopes in Regions with Low to Moderate Seismicity

Earthquake-induced sliding deformations are commonly used to assess the seismic performance of slopes. These deformations are the cumulative, downslope movement of a sliding mass occurred due to earthquake shaking, and represent the valuable indicator of risk and possible damage above slope. Current probabilistic procedures that use seismic...

Impact of recent changes in river management on maintenance dredging in the Waal river

Over the last centuries, Dutch rivers such as the Rhine have been heavily trained for the purpose of the safe discharge of water, sediment and ice, and navigability. After the notorious flood events of 1993 and 1995 along the Rhine, new large-scale river works were initiated, such as the Room for the River (RfR) programme, to increase flood...

RAMSSHEEP analysis: A tool for risk-driven maintenance. Applied for primary flood defence systems in the Netherlands

Introduction Floods are a threat to millions of people who live in lowlands like the Netherlands. Therefore the Dutch government has been given re-quirements for primary flood defence systems like dikes. The current condition of most of these dikes does not fulfill to these requirements based on flood risk analyses of RWS. The most logical step...

Impact assessment of extreme storm events using a Bayesian network

This paper describes an investigation on the usefulness of Bayesian Networks in the safety assessment of dune coasts. A network has been created that predicts the erosion volume based on hydraulic boundary conditions and a number of cross-shore profile indicators. Field measurement data along a large part of the Dutch coast has been used to...

Beach nourishment to mitigate the impact of sea level rise in Southeast Australia

The rise of sea level (18 to 91 cm in South Australia by the end of the 21st century) will result in beach erosion and, hence, poses a significant risk to the beaches of southeast Australia. This risk can be mitigated by means of beach nourishment. The costs of applying beach nourishment to the coast of southeast Australia in the 21st century...

Reducing uncertainty in prediction of dune erosion during extreme conditions

Coastal dunes protect low lying coastal areas against the sea. Extreme waves and water levels during severe storms may cause breaching of the dunes. Consequently, serious damage due to flooding and direct wave attack could occur, resulting in loss of life and property. Proper coastal management implies that reinforcement measures will be taken...

Probabilistic sensitivity analysis of dune erosion calculations

Coastal dunes protect low lying coastal areas against the sea. Extreme waves and water levels during severe storms may cause breaching of the dunes. Consequently, serious damage due to flooding and direct wave attack could occur, resulting in loss of life and property. Proper coastal management implies that reinforcement measures will be taken...

Probabilistische analyse van onzekerheden bij ontwerp en uitvoering van een enkellaagse geometrisch open filterconstructie in een open waterloop

In dit rapport worden de resultaten beschreven van een onderzoek naar de invloed van de diverse bij het ontwerp en de uitvoering van een enkellaagse geometrisch open filterconstructie aanwezige onzekerheden op de faalkans van de toplaag en de basislaag van de uiteindelijk gerealiseerde filterconstructie. De constructie bevindt zich hierbij in...

Probabilistic approach on course material transport under waves: Vol. 1 Theory and experiment.

The probabilistic design method of a cover layer of pipe line under the horizontal bottom is described. By assuming that the water velocity at the bottom is Rayleigh distributed, probability of bottom shear stress was derived. With a combination of the probability function of bottom shear and a simple sediment transport formula given by Madsen...