A simple algorithm to generate small geostatistical ensembles for subsurface flow simulation

This note describes the theory behind a simple Matlab program to generate ensembles of geological realizations of relatively small-scale reservoir models (permeability fields) for subsurface flow simulation. The algorithm makes use of Principal Component Analysis (PCA) to parameterize the spatial covariance of a reference image, and a Bayesian...

Polyurethane bonded aggregate revetments design manual

In this manual design rules and guidelines for the design of Polyurethane Bonded Aggregate revetments (PBA-revetments) are presented, based on results from laboratory research, full scale model tests, and experience and field measurements. Research is still ongoing, but from the first results some insight into the structural behaviour of PBA can...

Analyse van doorlatendheidsmetingen van steenzettingen

Doorlatendheidsmetingen steenzettingen

Doorlatendheid van gezette blokken op hun kant

Stabiliteit van ingegoten steenzettingen bij statische verschildruk

Doorlatendheidsmetingen van blokken op hun kant in Deltagoot

Laboratory experiments on consolidation and strength evolution of mud layers

Many harbours in the world suffer from high siltation rates in their basins. To guarantee safe shipping, harbour authorities have to maintain the navigable depth by dredging large amounts of mud. Some authorities relate the navigable depth to the depth at which the density is equal to a certain value, e.g. 1200 kg/m3. However, the shear strength...

Berm Breakwaters: Influence of Permeability and Stone Gradation

The influence of permeability and stone gradation on the reshaping and wave overtopping of berm breakwaters was studied by flume model tests. Another aspect studied was the difference in reshaping comparing a berm breakwater constructed of two stone classes and a more stable Icelandic type of berm breakwater with the largest berm stones used as...

Influence of permeability and stone gradation on Berm Breakwater stability

The influence of permeability and stone gradation on the reshaping and wave overtopping of berm breakwaters was studied as part of this research. Another aspect studied was the difference in reshaping comparing a berm breakwater constructed of two stone classes and a more stable Icelandic type of berm breakwater built of three stone classes with...

SKYLLA: Wave motion in and on coastal structures : implementation of impermeable slopes and overtopping-boundary conditions

Taludbekledingen van gezette steen: Doorlatendheid van toplaag en filter en berekening van leklengte

Erosion of sediment through cellular revetment blocks applied as slope protection along coasts and inland waterways

Erosion of banks and dikes subjected to water motion can be prevented, for instance by application of cellular concrete revetment blocks. This type of revetment combined the merits of a closed block revetment and a slope revetment consisting of loose materials. Advantages are high permeability, high stability against wave attack and low block...

The permeability of closely placed blocks on gravel

The permeability of a layer of closely placed concrete blocks on a sublayer of gravel or sand without a geotextile has been investigated. The results indicate that the permeability of the blocks can be described as a combination of the permeability of the joints and the permeability of the the gravel just below the blocks. The permeability of...

Stormvloedkering Oosterschelde: Waterloopkundige karakteristieken van kunststoffilters voor funderingsmat en grindworst

Afsluiting Brouwershavense gat, zuidelijk sluitgat: Afvoerkarakteristieken blokkendam

Geleidelijke sluiting - I: Invloed van de ruwheid en doorlatendheid van een dam op het voorkomen van een duikende straal