Concept

Mouille (hydrologie)

Publications associées (25)

Air concentration distribution in deflector-jets

As an alternative to ski jumps, deflectors can be implemented on spillways to generate free jets. They guide, up to a certain limit, the jet to an achieved location onto the plunge pool surface, and furthermore enhance the process of jet disintegration. Th ...

The University of Queensland2014

Influence of air entrainment on rock scour development and block stability in plunge pools

Rafael Xavier Meriade Duarte

Rock scour occurring near dam foundations due to high-velocity jets of spillways impinging into the plunge pool is a major concern regarding dam safety. Scour in fractured rock resulting from high-velocity jet impact is a complex phenomenon, which involves ...

EPFL - LCH2014

The hydro-morphological index of diversity: a tool for describing habitat heterogeneity in river engineering projects

Anton Schleiss, Walter Gostner

We present a new hydro-morphological index of diversity (HMID), a tool aimed for use in river engineering projects and firstly developed at gravel-bed streams in Switzerland, but intended for a broader use. We carried out field work with extensive hydrauli ...

Springer2013

Air concentrations in plunge pools due to aerated plunging high-velocity jets and dynamic pressures in underlying fissures

Rafael Xavier Meriade Duarte

High-velocity plunging water jets, such as those formed by spillways of high-head dams, cause scour on the rock foundations. The scour process is the result of complex physical phenomena concerning the three media involved, namely, water, rock and air. Air ...

TPI2013

Experimental study on bedload pulses in a steep flume with boulders

Tamara Ghilardi

TPU2013

Dynamic pressure distribution around a fixed confined block impacted by plunging and aerated water jets

Anton Schleiss, Rafael Xavier Meriade Duarte

The scour process created by the impingement of high-velocity water jets on fissured rock is the result of complex physical phenomena. Of great importance are the jet development during the trajectory through the atmosphere, the diffusion process inside th ...

TUP2013

Physical and numerical model study investigating plunge pool scour at Kariba Dam

Anton Schleiss, Michael Pfister, Erik Bollaert, Rafael Xavier Meriade Duarte

Kariba Dam is a 128 m high arch dam located on the border between Zambia and Zimbabwe. The dam has been constructed in the late 1950s and formed at that time the largest man-made lake worldwide. The dam is equipped with 6 flood gates, each about 9 m high b ...

2012

Dynamic Pressures around a Confined Block Impacted by Plunging Aerated High-Velocity Jets

Anton Schleiss, Erik Bollaert, Rafael Xavier Meriade Duarte

The impingement of high-velocity water jets on unlined plunge pools causes scour on the rock foundations. The scour process is the result of complex physical phenomena that happen consecutively. Turbulence and dynamic pressures play a major role, especiall ...

2012

Measures to reduce dynamic plunge pool pressures generated by a free jet

Michael Pfister

Spillways often include a flip bucket as terminal energy dissipator, combined with a plunge pool. To prevent scour at the river bed for large jet fall heights additional measures are required, such as terminal chute widening or increase of the plunge pool ...

CRC Press, Taylor & Francis Group2011

Kárahnjúkar Dam spillway, Iceland: Swiss contribution to reduce dynamic plunge pool pressures generated by a high-velocity jet

Michael Pfister

Spillways often include a flib bucket as terminal energy dissipator, combined with a plunge pool. For large jet fall heights, the residual energy may provoke scour at the river bed. Additional measures are then required, such as chute widening, increase of ...

2011

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