Publications by Tobias Meile | EPFL Graph Search

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High-head storage hydropower plants mainly operate their turbines during periods of high energy demand. The sudden starting and stopping of turbines (hydropeaking) lead to highly unsteady flow in channels and rivers. Besides hydropeaking, other anthropogen ...

High-head storage hydropower plants operate their turbines during periods of high energy demand. The starting and stopping of turbines results in rapid fluctuations of discharge and water levels in rivers called hydropeaking, which are unfavorable from an ecological point of view. Morphological measures might help to reduce the fluctuations by increasing the natural retention capacity of rivers. With this practical background, the experimental investigations presented in this paper focused on the determinat

The Gebidem Dam located on the Massa River intercepts annually around 400’000 m3 of solid material. These sediments must be evacuated by annual flushing of the reservoir over 4 to 7 days. A trend for silting in the flushing channel was observed during the ...

A 2D numerical flow model, developed at the Research unit of Hydrology, Applied Hydrodynamics and Hydraulic Constructions at ULg, has been applied to flows in a macro-rough channel. The model solves the shallow water equations (SWE) with a two length scale ...

Ultrasonic velocimetry based on the Doppler shift effect accurately provides quasi-instantaneous flow fields for fluids with a sufficiently high acoustic scattering level. However, ultrasonic velocity instruments are known to perform poorly in clear water ...

Systematic experimental investigations have been performed under steady flow conditions in a channel whose banks are equipped with large-scale rectangular roughness elements. The purpose was to determine the flow resistance owing to such macrorough banks. The practical motivation of the study is to see how morphological restoration of banks in channelized rivers, such as lateral cavities, influences the steady flow characteristics. The experiments performed in 40 different geometrical configurations reveale

Systematic investigations on positive and negative surge waves from upstream have been conducted in a 40 m long channel with a mean bed slope of 1.14? and non-prismatic bank geometries. The channel banks included macro-roughness elements, namely various cavities. In total, 41 different geometrical configurations have been investigated. The surge wave experiments confirmed the applicability of the elementary surge wave theory including secondary waves and wave breaking in the prismatic reference configuratio

Velocimetry is used in various fields of research. In hydraulics, Ultrasonic Velocimetry based on the Doppler Shift effect can accurately resolve the quasi-instantaneous flow field [Takeda Y. Velocity profile measurement by Ultrasonic Doppler method. Exper ...

elements. In addition to a prismatic reference channel, 41 different configurations of rectangular bank cavities have been investigated. The purpose was to study the effect of large-scale bank roughness on steady and unsteady flows. The macro-roughness of ...

In open channels, a sudden rise in water elevation generates a positive surge. Positive surges are commonly observed in man-made channels (Bazin 1865, Treske 1994) and a natural occurrence is the tidal bore in macro-tidal estuaries (Tricker 1965, Chanson 2 ...

River channelization and the construction of high-head storage schemes have been the basis of agricultural and socio-economic development in many alpine regions. One example is the Upper-Rhone River in Switzerland. The Upper-Rhone's morphology changed cons ...

Transverse or longitudinal movements of a water body are observed for flows along cavities, river embayments, groyne fields or harbours. They are significant for certain flow conditions and geometrical properties. To study the effect of large-scale roughne ...

The authors thank the discusser for his interest in our work and the complementary information on the behaviour of undular surges in a channel with a local rapid constriction and expansion. ...

Tobias Meile

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Influence of macro-roughness of walls on steady and unsteady flow in a channel

Influence of macro-rough banks on steady flow in a channel

Reservoir sedimentation management at Gebidem Dam (Switzerland)

2D numerical flow modeling in a macro-rough channel

Use of gas bubbles for ultrasound Doppler flow velocity profile measurement

Flow Resistance Caused by Large-Scale Bank Roughness in a Channel

Unsteady flow in a channel with large scale bank roughness

Improvement of Acoustic Doppler Velocimetry in steady and unsteady turbulent open-channel flows by means of seeding with hydrogen bubbles

Propagation of surge waves in channels with large-scale bank roughness

Discussion “Propagation of surge waves in channels with large-scale bank roughness"

Deflectors as riverbanks protection measures

Hydropeaking indicators for characterization of the Upper-Rhone River in Switzerland

Water-surface oscillations in channels with axi-symetric cavities

Experimental study on steady flow in a channel with macro-roughness at the side walls

Entwicklung des Abflussregimes der Rhone seit dem Beginn des 20. Jahrhunderts, Nouveaux développements dans la gestion des crues

Entwicklung des Abflussregimes der Rhone seit dem Beginn des 20. Jahrhunderts

Schwall und Sunk in Fliessgewässern

Oscillations in a channel with rectangular widenings at the side walls

Closure to "Propagation os surge waves in channels with large bank roughness

Oscillations in a Channel with Rectangular Widenings at the Side Walls