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...

The challenge of adopting mitigation and adaptation measures for the impacts of sand and dust storms in Eastern Mediterranean Region: a critical review

Sand and dust storms (SDS) are a major disruptor in both the source areas where they occur and at distant locations. This critical review aims to address the question of whether mitigation and adaptation measures have been or can be implemented and what is the optimal scale of their implementation to negate the impacts of SDS in Eastern...

Transport and Morphodynamics in a Fine Sediment Estuary: From Conceptual Understanding to Numerical Modeling

This dissertation presents a study of fine sediment transport and morphodynamics in estuarine settings using data from the Lower Passaic River (LPR), located in New Jersey, USA. Originally a relatively shallow system, it has been dredged and deepened for navigation purposes from the late-1800s onwards, along with other modifications such as...

Verification of a Predictive Formula for Critical Shear Stress with Large Scale Levee Erosion Experiment

Apart from the soil erodibility parameter, the critical shear stress is the most important parameter in predicting erosion rates. On the basis of experiments several empirical formulas have already been de-veloped which relate the critical shear stress to soil properties. Based on these findings and supported by new large scale experiments, a...

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....

Surficial sediment erodibility from time-series measurements of suspended sediment concentrations: development and validation

Numerical models of fine sediment transport depend on different approaches to parameterize the erosion properties of surficial sediment strata. These properties, namely the critical shear stress for erosion and the erosion rate coefficient, are crucial for reproducing the short-term and long-term sediment dynamics of the system. Methods to...

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...

Morphological modeling using a fully coupled, total variation diminishing upwind-biased centered scheme

High-resolution morphological modeling of fluvial processes with complex, rapidly varying flows has been limited so far by model accuracy or computational efficiency. One of the most widely used numerical algorithms is based on the total variation diminishing method, solved by either upwind or centered approaches. An upwind scheme preserves high...

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...

Stormvloedkering Oosterschelde: Stabiliteit drempelkruin onder de dorpel zonder aanstortingen : invloedsfaktor geopende en gesloten schuif

Gedrag fosforslakken als bodembeschermingsmateriaal onder stroomaanval en verval

Erosiebestendigheid van slib

Stroombestendigheid sluitgatdrempel IV: Stabiliteit los materiaal achter een dam met brede kruin

Erosiebestendigheid zand-sliblagen