Publications by Benoît Crouzy

Stability analysis of ecomorphodynamic equations

In order to shed light on the influence of riverbed vegetation on river morphodynamics, we perform a linear stability analysis on a minimal model of vegetation dynamics coupled with classical one- and two-dimensional Saint-Venant-Exner equations of morphod ...

Amer Geophysical Union2016

Ecomorphodynamic approaches to river anabranching patterns

Benoît Crouzy, Paolo Perona

We investigate the influence of vegetation on river morphological instabilities using an analytical framework. We first discuss the important role of the hydrological (flooding frequency) and biological (vegetation development rate) timescales. As long as ...

Elsevier2016

Non-proportional Repartition Rules Optimize Environmental Flows and Energy Production

Benoît Crouzy, Paolo Perona, Pierre Razurel, Lorenzo Gorla

In order to meet the growing demand for energy, the development of hydropower leads to an increase of the river exploitation by human activities. Thereby, water management has become a major issue in the energy transition. A better definition of the flow r ...

Springer2016

Quantifying snowfall and avalanche release synchronization: a case study

Benoît Crouzy, Paolo Perona, Romain Forclaz, Betty Sovilla

We quantify the synchronization between snowfall and natural avalanches in relation to terrain properties at the detachment zone. We analyze field statistics of 549 avalanche events in terms of slope, aspect, timing, coordinate, and release area, identifie ...

Wiley-Blackwell2015

Experimental characterization of vegetation uprooting by flow

Benoît Crouzy, Paolo Perona, Katharina Maria Edmaier

We investigate vegetation uprooting by flow for Avena sativa seedlings with stem-to-sediment size ratio close to unity and vanishing obstacle-induced scouring. By inducing parallel riverbed erosion within an experimental flume, we measure the time-to-uproo ...

2015

Ecomorphodynamic conditions for the emergence of river anabranching patterns

Benoît Crouzy, Paolo Perona, Paolo d'Odorico

The appearance of the regular vegetated ridge patterns observed in some ephemeral rivers of semi-arid regions (Nanson, Tooth, & Knigthon 2002) has previously been explained by hydraulic arguments (optimization of the bed load transport capacity, see Huang ...

Crc Press-Taylor & Francis Group2014

Ecomorphodynamics of rivers with converging boundaries

Benoît Crouzy, Peter Molnar, Paolo Perona

Many rivers worldwide show converging sections where a characteristic limiting front for vegetation establishment on gravel bars is observed. An important conceptual model was advanced in 2006 by Gurnell and Petts, who demonstrated that for the convergent ...

Wiley-Blackwell2014

Flow-induced uprooting of young vegetation on river bedforms

Benoît Crouzy, Paolo Perona, Katharina Maria Edmaier

Riparian vegetation stabilizes sediment by its roots and henceforth impacts riparian morphodynamics. After germination or vegetative reproduction on river bars or islands, juvenile plants are exposed to a high risk of mortality due to uprooting by floods. ...

Crc Press-Taylor & Francis Group2014

Biomechanics of plant anchorage at early development stage

Benoît Crouzy, Paolo Perona, Katharina Maria Edmaier

We propose a minimal model for the response of seedlings to pullout constraints. Central to our approach is the idea of capturing not only average mechanical properties but also the stochastic component of the uprooting process. Our model accounts on one h ...

Academic Press Ltd- Elsevier Science Ltd2014

Influence of root characteristics and soil variables on the uprooting mechanics of Avena sativa and Medicago sativa seedlings

Benoît Crouzy, Paolo Burlando, Paolo Perona, Katharina Maria Edmaier

The success of seedlings and rejuvenated woody debris growing on river bedforms depends on the resistance to uprooting by flow provided by their simple root architecture. Avena sativa and Medicago sativa seedlings were used in flume experiments as prototyp ...

Wiley-Blackwell2014

Magnetic interference patterns in long disordered Josephson junctions

Benoît Crouzy, Dmitri Ivanov

We study a diffusive superconductor–normal-metal–superconductor (SNS) junction in an external magnetic field. In the limit of a long junction, we find that the form of the dependence of the Josephson current on the field and on the length of the junction d ...

Amer Physical Soc2013

Impact of floods on the statistical distribution of riverbed vegetation

Benoît Crouzy, Paolo Perona, Katharina Maria Edmaier

Investigating the colonization of river bars by pioneer vegetation, we discuss how the balance between uprooting by flooding events and reinforcement of plant roots determines the ability for vegetation to colonize the riverbed. In order to access the comp ...

Elsevier Science Bv2013

Biomass selection by floods and related timescales: Part 1. Experimental observations

Benoît Crouzy, Peter Molnar, Paolo Perona, Katharina Maria Edmaier, Zhe Jiang

Several research investigations have explored the interaction between morphodynamic and vegetation growth processes from both the modelling and the experimental viewpoints. Results have mainly been concerned with morphologic analyses of the effects of vege ...

Elsevier2012

Experimental characterization of root anchoring in non-cohesive sediment

Benoît Crouzy, Paolo Burlando, Paolo Perona, Katharina Maria Edmaier

Taylor & Francis Group2012

Stochastic dynamics of snow avalanche occurrence by superposition of Poisson processes

Benoît Crouzy, Paolo Perona

We study the dynamics of systems with deterministic trajectories randomly forced by instantaneous discontinuous jumps occurring according to two different compound Poisson processes. One process, with constant frequency, causes instantaneous positive rando ...

Royal Soc2012

Biomass selection by floods and related timescales. Part 2: Stochastic modeling

Benoît Crouzy, Paolo Perona

We analyze the results from a flume experiment presented in a companion paper by Perona et al. [1] exploring the selective action of floods on pioneer riparian vegetation. We study the way seedlings react to periodic flow disturbances in the early stages o ...

Elsevier2012

Impact of virus aggregation on inactivation by peracetic acid and implications for other disinfectants

Benoît Crouzy, Michael Jon Mattle, Tamar Kohn, Paolo Perona, Moritz Brennecke, Krista Rule Wigginton

Viruses in wastewater and natural environments are often present as aggregates. The disinfectant dose required for their inactivation, however, is typically determined with dispersed viruses. This study investigates how aggregation affects virus inactivati ...

2011

Effects of magnetism in superconducting hybrid structures

Benoît Crouzy

In this thesis we study various effects of magnetism in proximity structures, composed of superconducting electrodes in contact with a normal metal. Magnetism can be present in the system through the Zeeman and the orbital coupling. Proximity structures of ...

EPFL2009

Josephson current in a superconductor-ferromagnet-superconductor junction with in-plane ferromagnetic domains

Benoît Crouzy, Dmitri Ivanov

We study a diffusive superconductor-ferromagnet-superconductor (SFS) junction with in-plane ferromagnetic domains. Close to the superconducting transition temperature, we describe the proximity effect in the junction with the linearized Usadel equations [P ...

2007

Josephson current in a superconductor-ferromagnet junction with two non-collinear magnetic domains

Benoît Crouzy, Dmitri Ivanov

We study the Josephson effect in a superconductor--ferromagnet--superconductor (SFS) junction with ferromagnetic domains of non-collinear magnetization. As a model for our study we consider a diffusive junction with two ferromagnetic domains along the junc ...

2006