Fanny Arnaud

University of Lyon - CNRS - Ecole Normale Supérieure de Lyon · UMR 5600 Environnement Ville Société

Sediment transport is a key process that affects the morphology and ecological habitat diversity of rivers. As part of a gravel augmentation program to mitigate sediment deficit below a dam, gravel mobility in the Ain River in Eastern France was investigated by tracking of a large amount ( n = 1063) of PIT‐tagged gravels in the field, conducting a...

Soon after their first deployment in rivers in the early 2000s, RFID tags rapidly became the reference technology for bedload tracing in rivers. We can estimate from the literature that during the last 20 years, more than 30,000 RFID tracers have been injected in gravel‐bed rivers all around the world to study bedload transport. Many field experime...

River rehabilitation and ecological engineering are becoming critical issues for improving river status when ecological habitats and connectivity have been altered by human pressures. Amongst the range of existing rehabilitation options, some specifically focus on rebuilding fluvial forms and improving physical processes. The aim of this contributi...

RFID particle tracking provides a reliable and accurate representation of the bedload movement useful for monitoring gravel augmentation • The probabilistic approach correctly reproduces the average trend in travel distances and is permits to discuss the frontrunners • The 2D modeling accounts for variability of hydrodynamic conditions and simulate...

Des chercheurs de l’Observatoire Hommes-Milieux Vallée du Rhône (CNRS-INEE) ont travaillé en 2017-2018 sur la bancarisation et la visualisation de ressources biophysiques historiques sur le fleuve Rhône. Ce projet interdisciplinaire, associant des géographes et des écologues, a consisté à prospecter des services d’archives encore peu explorés afin...

Poster: The purpose of the project is to innovate the deployment of Riverscapes Consortium (RC) datasets, models and tools into broad adoption by European practitioners, managers and researchers to help improve riverscape health. Specifically, this project will facilitate a strategic collaboration between the RC and the researchers of the EUR H2O'L...

Most of Europe's major rivers have been managed and regulated for navigation purposes, hydro-electricity production, agricultural activities and flood protection. This regulation induced a degradation of hydro-morphological conditions and ecological processes promoting an alteration and a simplification of both aquatic and riparian habitats, and ec...

La recherche menée sur les socio-écosystèmes au sein des dispositifs de l'INEE (notamment le Réseau des Zones Ateliers et les Observatoires Hommes-Milieux) est largement interdisciplinaire. Les projets de recherche génèrent par ailleurs une grande quantité de données spatio-temporelles et hétérogènes, ce qui rend complexe la synthèse des résultats...

Workshop presentation of the biological effects of gravel re-injection in the Upper Rhine

Environmental legislation at the national and international level established clear ecological objectives for river management, which incite public agencies in France to develop an ambitious program of river restoration. The fact that today’s rivers are central to a row of human uses, imposes considering them in multiple perspectives and integratin...

Gravel augmentation and bank (re-)erosion are increasingly performed by managers of regulated rivers to enhance bedload transport, recreate pioneer units, rejuvenate channel forms, and diversify aquatic and riverine habitats. This paper aims providing feedbacks from unprecedent restoration actions conducted along the Upper Rhine river downstream of...

Space and time analyses of channel changes, especially within large rivers subject to high levels of human impact, are critical to address multiple questions about rivers in the Anthropocene era. The reconstruction of long-term (> 150 year) evolutionary trajectories permits an understanding of how natural and anthropogenic factors impact hydromorph...

Over the last two centuries, rivers were strongly regulated, inducing notable sedimentstarvation and flow reduction. This regulation altered aquatic habitats, biocenosis andecosystem services. Gravel augmentation (GA) is increasingly promoted to restorebedload transport, rejuvenate bed sediments and diversify aquatic and riverinehabitats. However,...

Space and time analyses of channel changes, especially within large rivers subject to high levels of human impact, are critical to address multiple questions about rivers in the Anthropocene era. The reconstruction of long-term (> 150 year) evolutionary trajectories permits an understanding of how natural and anthropogenic factors impact hydromorph...

Depuis 20 ans, la ZA Seine et la ZA Rhône ont une pratique de co-construction de leurs actions de recherche avec les acteurs des territoires concernés, d'abord autour du fleuve, puis sur l'ensemble du bassin fluvial. L'élargissement des thématiques de recherche a fait évoluer les modes de co-construction. Certaines actions de recherche ont été co-c...

The LabEx DRIIHM is a research network that gathers together 13 Human-Environment Observatories (OHM) focused on anthropogenically modified socio-ecosystems in France and worldwide. Within the open science context, a Research Data Infrastructure (RDI) was implemented brick by brick to describe, visualize, and disseminate multidisciplinary long-tail...

Developing online services for data access, visualization and analysis are an essential component of current research in environmental science, especially to promote interdisciplinary research and to transfer scientific knowledge to decision makers. Such approach has been adopted in the “Rhône Valley” Human-Environment Observatory, a scientific pla...

The rivers of the world are undergoing accelerated change in the Anthropocene, and need to be managed at much broader spatial and temporal scales than before. Fluvial remote sensing now offers a technical and methodological framework that can be deployed to monitor the processes at work and to assess the trajectories of rivers in the Anthropocene....

Trois injections sédimentaires ont été réalisées dans le Vieux Rhin entre 2010 et 2017 en vue de restaurer les processus géomorphologiques et la fonctionnalité des écosystèmes aquatiques et riverains. L'objectif de cette communication est de montrer les principales réponses des compartiments géomorphologiques et écologiques à ces actions de restaur...

Elaboré en étroite collaboration avec le Bureau du Comité Scientifique et Technique de la SHF qui propose les sujets, chaque dossier thématique est l'occasion de replacer un sujet dans son actualité. Une praticien.ne, endossant le rôle de rédacteur en chef, propose des contributions complémentaires issues de la communauté scientifique, technique, d...

The reconstruction of long-term (>100 yr) channel changes is critical to understanding how natural and anthropogenic factors impact the evolution of river systems. It provides information on channel sensitivity and the limitations for channel repair in a functional river restoration context. This study presents a two-century analysis of the evoluti...

RESUME. L’Observatoire Hommes-Milieux (OHM) Vallée du Rhône appréhende les dynamiques de l’hydrosystème et des sociétés riveraines sur l’ensemble du Rhône français. Depuis sa création en 2010, la mutualisation et la valorisation des données produites ont été structurées dans une Infrastructure de Données Spatio-temporelles (IDS), ce qui a renforcé...

RESUME. L’Observatoire Hommes-Milieux (OHM) Vallée du Rhône appréhende les dynamiques de l’hydrosystème et des sociétés riveraines sur l’ensemble du Rhône français. Depuis sa création en 2010, la mutualisation et la valorisation des données produites ont été structurées dans une Infrastructure de Données Spatio-temporelles (IDS), ce qui a renforcé...

River restoration efforts require interdisciplinary approaches involving fluvial geomorphology, hydraulic engineering, ecology, sedimentology, chemistry, social geography, and sociology. We investigated the functioning of artificial structures called “Casiers Girardon” (groyne fields) in the Rhône River. We assessed potential benefits and risks lin...

During the last 30 years, river restoration activities aiming to improve the functionality of degraded fluvial ecosystems increased markedly. For large rivers, it remains difficult to evaluate restoration efficiency and sustainability due to the lack of standardized monitoring metrics. From 2010 to 2016, three gravel augmentations were performed on...

While different techniques for tracking bedload transport exist (paint marking, metallurgic slags), the most commonly deployed technique in the field these last twenty years has remained passive RFID transponders. More recently, the use of active Ultra High Frequency RFID transponders has been tested. Until now, this technique has only been used in...

While different techniques for tracking bedload transport exist (paint marking, metallurgic slags), the most commonly deployed technique in the field these last twenty years has remained passive RFID transponders. More recently, the use of active Ultra High Frequency RFID transponders has been tested. Until now, this technique has only been used in...

L’injection artificielle de sédiments est une technique mise en œuvre sur des cours d’eau enregistrant un transport solide déficitaire, à la suite notamment d’extractions sévères de granulats ou de l’interruption du transit sédimentaire par des barrages. L’apport de charge grossière a pour objectif d’améliorer la dynamique morphologique à l’origine...

Article paru dans la rubrique Carte à la une du site web Géoconfluences : publication en ligne à caractère scientifique pour le partage du savoir et pour la formation en géographie. URL de l'article : http://geoconfluences.ens-lyon.fr/informations-scientifiques/a-la-une/carte-a-la-une/reconstituer-rhin-disparu

Actions are being developed to address the adverse consequences of engineering works on large European rivers by developing and implementing restoration activities in order to enhance the functionality and biodiversity of fluvial hydrosystems. However, as has frequently been mentioned in the scientific literature, quantitative and qualitative evalu...

The Old Rhine is a 50 km bypassed reach downstream from the Kembs diversion dam in the Alsacian plain (France/Germany). It has been impacted by engineering works since the 19 th century. This reach exhibits poor ecological functionalities due to severe geomorphological alterations (e.g., channel bed stabilization, narrowing, degradation and armorin...

Le Vieux Rhin est un chenal court-circuité de 50 kilomètres à l’aval du barrage de dérivation de Kembs. Il a été fortement impacté par divers aménagements depuis le XIXè siècle visant la protection contre les crues, le développement de la navigation et la production d’hydro-électricité. Une part importante du débit (jusqu’à 1 400 m3/s) est dérivée...

Séminaire Bases de Données de l’OHMI Téssékéré

Data produced within marine and terrestrial biodiversity research projects that evaluate and monitor Good Environmental Status, have a high potential for use by stakeholders involved in environmental management. However, environmental data, especially in ecology, are not readily accessible to various users. The specific scientific goals and the log...

The Rhône river is one of the main European alpine rivers (watershed: 98 500 km²; length: 812 km; mean annual discharge at its mouth: 1700 m3 s-1). The fluvial landscape has been engineered for more than 150 years (e.g., dykes, hydroelectric canals) leading to altered aquatic and riparian ecosystems. Today, stakeholders face tension in balancing va...

Data produced by biodiversity research projects that evaluate and monitor Good Environmental Status have a high potential for use by stakeholders involved in [marine] environmental management. The lack of specific scientific objectives, poor organizational logic, and a characteristically disorganized collection of information leads to a decentraliz...

The artificial gravel augmentation of river channels is increasingly being used to mitigate the adverse effects of river regulation and sediment starvation. A systematic framework for designing and assessing such gravel augmentations is still lacking, notably on large rivers. Monitoring is required to quantify the movement of augmented gravel, meas...

The aim of this paper is to summarize the results achieved over the last 10 years on several large French rivers concerning the mobility monitoring of pebbles equipped with passive and active RFID (Radio Frequency IDentification). The results are presented first from a thematic perspective, to characterize the sediment mobility based on injection c...

Over the last two centuries, the Upper Rhine River was subjected to important hydraulic engineering works which have severely damaged its functioning. The Old Rhine is a 50-km long by-passed single bed paved channel, which is located downstream of the Kembs dam. In 2010, a restoration program was initiated to diversify aquatic and riparian habitats...

Low-frequency Passive Integrated Transponders (LF-PIT tags) have been increasingly used to track bedload transport in gravel-bed rivers. Prior studies have reported high recovery rates in small streams. Recovery rates remained much lower in large systems, in large parts because of the limited reading distance of the tags (< 1 m), the problem of sig...

An experimental gravel reintroduction was conducted into the Rhine River to assess the feasibility of restoring the sedimentary dynamics and improving the morpho-ecological processes over the medium and long terms. 23.000 m3 of sediments were supplied in 2010 in a 50 km long, by-passed river reach between the Kembs and Breisach dams. A deposit of 6...

A research program to better understand the alluvial behavior of a regulated reach has been established on the Ain River. The objectives are to characterize aquatic habitats and analyze the physical factors that affect fish populations to restore sediment fluxes and maintain sustainable aquatic and riparian ecosystems of a shifting river. The lower...

The Old Rhine downstream of the Kembs diversion dam is one of the largest by-passed river reaches in the world (50 km). It offers a unique opportunity to study the morphological effects of by-passing and address physical and ecological restoration approaches in regulated rivers. We conduct a space-time analysis of channel adjustment over a period o...

Low-frequency passive integrated transponders (PIT tags) have been increasingly used for tracking bedload transport in gravel-bed rivers. Prior studies have reported high recovery rates in small streams, while recovery rates remained much lower in large systems, in large part because of the limited reading distance of the tags (< 1 m). Some laborat...

Le Rhin franco-allemand a été aménagé depuis deux siècles pour la protection contre les inondations, la navigation et la production hydro-électrique. La rectification (19ème siècle), la mise en place d’épis (1930) et la construction du Grand Canal d’Alsace (1928-1959) ont profondément altéré l’hydromorphologie du « Vieux Rhin », tronçon de 50 km co...

The European Water Framework Directive (2000/60/CE) requires to achieve the good ecological status of bodies of surface water by 2015. Growing efforts have thus been made in last decades for restoring physical processes and associated ecological habitats of altered river reaches. Retrospective and experimental fluvial geomorphology should be used t...

Coarse sediment reintroduction into a river channel is a management practice commonly applied to mitigate adverse effects of human pressures on gravel-bed rivers, e.g. damming, gravel mining or channelisation that cause sediment deficit and associated channel incision and ecological habitat alterations. These issues are critical in France where sev...

Rapport de synthèse du programme INTERREG IVA Rhin Supérieur "Redynamisation du Vieux Rhin" (2009-2012)

The Upper Rhine River has undergone several anthropogenic modifications since the last two centuries for flood protection, navigation and hydropower generation. Channel rectification, groyne fields and lateral “Grand Canal of Alsace” construction heavily altered the hydro-sedimentary functioning of the 50 km-long "Old Rhine" by-passed between Kembs...

The Upper Rhine River has undergone several anthropogenic modifications since the last two centuries for flood protection, navigation and hydropower generation. Channel rectification, groyne fields and lateral "Grand Canal of Alsace" construction heavily altered the hydro-sedimentary functioning of the 50 km-long "Old Rhine" by-passed between Kembs...

The analysis of the morphological changes occurred during the last century was conducted on the Rhine River between Kembs and Breisach. This study is included in the INTERREG project "Redynamization of the Old Rhine" which is aimed at investigating strategies for the restoration of morphodynamic processes. The 45 km-long by-passed reach has been he...

A sediments injection test has been realized within the river Rhine in the frame of the French and German INTERREG project 'Revitalisation of the Old Rhine'. The project aims at establishing sediment transport restoration modalities and recreating a variety of ecological habitats that feeds the reach biodiversity. 22,000 m3 of sediments have been i...

Aerial high resolution visible imagery allows producing large river bathymetry assuming that water depth is related to water colour (Beer-Bouguer-Lambert law). In this paper we aim at monitoring Rhine River geometry changes for a diachronic study as well as sediment transport after an artificial injection (25.000 m3 restoration operation). For that...

The Old Rhine is a 45 km-long reach, by-passed by a hydropower scheme achieved in 1959. Since the 1950's, incision, constriction and armouring of the river bed were observed, along with a significant decrease in sediment transport. GIS analysis enabled a description of the reach evolution based on aerial photographs from 1949 till 2008 every 10 yea...

The 45 km-long reach of the Rhine River from Kembs to Breisach has been heavily impacted by engineering works during the last two centuries. The Kembs dam and the lateral “Grand Canal d’Alsace” achieved in 1959 induced significant decrease in sediment transport and diversion of most of the flow in the lateral canal so that the by-passed “Old Rhine”...

The 45 km-long reach of the Rhine River from Kembs to Breisach has been heavily impacted by engineering works during the last two centuries. The Kembs dam and the lateral ``Grand Canal d'Alsace'' achieved in 1959 induced significant decrease in sediment transport and diversion of most of the flow in the lateral canal so that the by-passed ``Old Rhi...

The Upper Rhine between France and Germany has been heavily impacted by channelization for navigation and then by dams works during the last two centuries. Most of the flows are now conveyed in a canalized section, a minimum discharge been reserved in the old section, so called the “Old Rhine”. Between Huningue and Neuf-Breisach (45 km), the longes...

Within the framework of current researches on the role – positive or negative - of vegetation on slope stability, a study was carried out to analyze the impacts of trees on landslide activity in the French South Alps. The objectives of this work were to determine to what extent forest vegetation help to stabilize a slope and to what extent tree ana...