Effect of cyclic wetting and drying on soil erodibility

Cyclic wetting and drying impact the integrity of cohesive clay materials in geotechnical engineering applications. Boom Clay, frequently used in erosion protective layers, presents a critical case study due to its widespread application and the environmental conditions it endures. This research delves into the effects of repeated wetting and...

Scour holes in heterogeneous subsoil: A numerical study on hydrodynamical processes in the development of the scour holes

In the Rhine-Meuse Delta in the Netherlands, deep scour holes can develop very suddenly. The holes may form a potential risk for the stability of surrounding riverbanks, dikes, bridges, tunnels and buildings. A scour hole can mostly be the result of two conditions: local changes in hydrodynamical conditions or local changes in erosive capacity...

Scour holes in heterogeneous subsoil: An experimental study to improve knowledge of the development of scour holes in heterogeneous subsoil

In the Rhine-Meuse delta many scour holes are present. These scour holes form a potential risk on the surrounding bridges, levees, weirs, dikes and tunnels. In general, scour holes can develop when there is a local change in hydrodynamic conditions or erosive capacity. Extensive research has been done in the past on scour holes close to...

Effects of water inifltration on soil erodibility

A new flood risk approach for design and testing of primary and secondary flood defence structures in the Netherlands relies on the probability of loss of the water retaining capacity. Determining this probability for levees requires a better understanding of consequences of extreme conditions leading to failure, starting with a study of soil....

Development of scour in non-cohesive sediment under a poorly erodible top layer

The rivers in the South-West of The Netherlands flow over an erosion-resistant bed, consisting of peat and clay, overlying non-cohesive sediments. As they are experiencing general incision, the erosion resistant layer becomes thinner and sometimes locally breaks, exposing the more easily eroded non-cohesive sediments. Consequently sudden scour...

The Effect of Bioturbation on the Erodibility of Fine Sediments in Lake Markermeer

Lake Markermeer is a large and shallow freshwater lake in the center of the Netherlands. The lake was originally part of the Zuiderzee, a sea inlet of the North Sea. The lake is an important ecosystem, especially for water birds. The main problem in Lake Markermeer is the decreasing ecological value. High turbidity levels are believed to be one...

Morphological aspects of non-erodible reaches in rivers

The bed of some rivers partially consists of non-erodible layers. These non-erodible layers may become obstacles for navigation during the low-water period. To improve navigation development in the future, one can consider the removal of the non-erodible layers. To predict the morphological consequences due to these works, knowledge about the...