Layers of stone or rock are often applied around hydraulic structures to protect the sand bed from scouring. Determining the size of the rocks is complicated by the fact that the flow over a bed protection usually is non-uniform. This thesis describes two experimental series in which the stability of a single stone under non-uniform flows is studied in detail. From these experiments more understanding in the process of damage to bed protections is obtained. It is seen that besides the classical form drag, also small-scale accelerations in the flow attribute to the stone movement. In the last chapter a new stability model is developed for practical use
Erosion and sedimentation are natural processes that occur in natural flows.If the erosion is a thre...
As reflected in the scale of large contemporary hydropower schemes, flowing water may carry huge amo...
Both the fluid- and solid-transmitted stresses to a cohesive bed have been investigated in both lab ...
Layers of stone or rock are often applied around hydraulic structures to protect the sand bed from s...
Despite the fact that many studies on the stability of stones in bed protections under flowing water...
A stability parameter for rock in bed protections under nonuniform stationary flow is derived. The i...
In order to understand the processes involved in damaging a granular filter, the behaviour of the se...
This paper presents the results of an experimental study on stone stability under nonuniform turbule...
Downstream of man-made hydraulic structures, bed protections made of granular material are often use...
The current research is aimed at finding a proper relation between flow forces acting on the bed and...
Previous research (e.g., Jongeling et al 2003; Hofland 2005) has shown that turbulence has an import...
In this research, experiments were carried out in which both the bed response (quantified by a dimen...
The stability of a bed of stones subject to a flow is often described in terms of a critical velocit...
The second chapter describes the general methodology of the research. It presents the key questions ...
In this thesis, it is studied if the stability of a stone in a granular bed protection, can be predi...
Erosion and sedimentation are natural processes that occur in natural flows.If the erosion is a thre...
As reflected in the scale of large contemporary hydropower schemes, flowing water may carry huge amo...
Both the fluid- and solid-transmitted stresses to a cohesive bed have been investigated in both lab ...
Layers of stone or rock are often applied around hydraulic structures to protect the sand bed from s...
Despite the fact that many studies on the stability of stones in bed protections under flowing water...
A stability parameter for rock in bed protections under nonuniform stationary flow is derived. The i...
In order to understand the processes involved in damaging a granular filter, the behaviour of the se...
This paper presents the results of an experimental study on stone stability under nonuniform turbule...
Downstream of man-made hydraulic structures, bed protections made of granular material are often use...
The current research is aimed at finding a proper relation between flow forces acting on the bed and...
Previous research (e.g., Jongeling et al 2003; Hofland 2005) has shown that turbulence has an import...
In this research, experiments were carried out in which both the bed response (quantified by a dimen...
The stability of a bed of stones subject to a flow is often described in terms of a critical velocit...
The second chapter describes the general methodology of the research. It presents the key questions ...
In this thesis, it is studied if the stability of a stone in a granular bed protection, can be predi...
Erosion and sedimentation are natural processes that occur in natural flows.If the erosion is a thre...
As reflected in the scale of large contemporary hydropower schemes, flowing water may carry huge amo...
Both the fluid- and solid-transmitted stresses to a cohesive bed have been investigated in both lab ...