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Gilles Arnaud-Fassetta

Gilles Arnaud-Fassetta
University of Paris / PRODIG

Professor of geography (hydrogeomorphology & geoarcheology)

About

284
Publications
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Publications

Publications (284)
Article
Full-text available
Snow avalanches are a major component of the mountain cryosphere, but little is known about the factors controlling the variability of their deposit volumes. This study investigates the influence of avalanche path morphology on ca. 1500 deposit volumes recorded between 2003 and 2018 in 77 snow avalanche paths of the French Alps. Different statistic...
Article
Full-text available
Since the 2000s, European rivers have undergone restoration works to give them back a little more ‘freedom space’ and consolidate the hydro-sedimentary continuum and biological continuity as required by the Water Framework Directive (WFD). In high-energy rivers, suppression of lateral constraints (embankment removal) leads to geomorphological readj...
Article
Full-text available
The Seti River originates from the Annapurna Massif in the Higher Himalaya of Nepal and flows through the Pokhara valley in the Lesser Himalaya. The Seti River witnessed a disastrous flash flood on May 5th, 2012 causing the death of 72 people, obliterating dozens of homes and damaging infrastructures worth millions of dollars. Despite the 2012 floo...
Preprint
Full-text available
Snow avalanches are a major component of the mountain cryosphere, but little is known about the factors controlling the variability of their deposit volumes. This study investigates the influence of morphological characteristics on c. 1500 deposit volumes recorded between 2003 and 2018 in 77 snow avalanche paths of the French Alps. Different statis...
Article
Full-text available
https://journals.openedition.org/geomorphologie/15496
Article
Full-text available
Consultable sur : https://journals.openedition.org/cybergeo/35713 Many large cities rely on remote water resources for their drinking water supply. Projects to transfer water to urban centers have been contested in the past and are still a socio-political issue today. Half of the volume of drinking water distributed in Paris comes from groundwater...
Article
Full-text available
In the past 20 years, motor road and bridge construction works have increased significantly in Nepal, in most cases with poor consideration of geo-hazards (rockfalls, landslides, debris flows) and river-flow dynamics. The National Road Construction (NRC) is further fostered by China's Belt and Road Initiative (BRI). Currently, the Kali Gandaki (KG)...
Article
Massive gravel replenishment combined with active-channel widening could theoretically improve the morphological recovery of altered braided rivers but this restoration strategy was not yet tested in the field. A recent braided restoration project based on this principle was set up to restore a 4.2 km long reach in the Upper Drac River (French Alps...
Article
Full-text available
Désormais en accès libre : https://doi.org/10.1051/lhb/2020046 Cet article interroge les conditions d'appropriation des enjeux de protection des captages d'une grande ville sur les territoires où ils sont implantés. Le cas étudié est celui des aires d'alimentation des captages (AAC) de Paris en Seine-et-Marne (France). Des enquêtes qualitatives ont...
Article
Full-text available
Located in the western part of the Paris Basin, the Eure catchment is marked by a several thousand years old human occupation. At the interface between several cultural groups since the Neolithic period (Gord, Artenac and Brittany), the Eure valley is a key archeological area for performing geoarchaeological investigations. The aim of this multisca...
Article
Full-text available
High mountain regions are extremely sensitive to current climate change affecting natural processes and related hazards (i.e. glacier retreat, slope instability, formation and enlargement of proglacial lakes). Ice-Dammed Lake Outburst Floods (IDLOFs) are highlighted among these phenomena and reach a greater socio-economic impact due to their highly...
Article
Full-text available
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...
Article
Full-text available
The Saint‐Sauveur dam was built in 1992 in the middle section of the Buëch River. Downstream of the dam, a channel incision by several meters was observed. A gravel replenishment operation was planned in order to restore the active channel. An equivalent of two times the mean annual bedload‐transport capacity (43,500 m3) was replenished downstream...
Article
Full-text available
Acting as efficient earth‐movers, soldiers can be viewed as significant geomorphological drivers of landscape change when replaced in the recent debates on Anthropocene Geomorphology. “Polemoforms”, generated by the military activities, correspond to a set of human‐made landforms of various sizes and geometries. They are particularly common on the...
Article
Full-text available
The adaptation of territorial systems to the ongoing climate change is an issue which implies to test past populations abilities to cope, to “bounce back” or to adapt during similar past environmental changes. The chronostratigraphical and archaeological results, obtained in the frame of the LITAQ project, make it possible to better understand chan...
Article
Located at the mouth of the Gironde estuary (southwestern Atlantic coast of France), the Amélie beach recorded a huge coastal erosion during the recent stormy events, especially in the winter 2013-2014. The dune scarping and the sediment depletion on the beach uncovered a set of estuarine and aeolian sediment deposits containing numerous archaeolog...
Presentation
Full-text available
In order to reach WFD (2000) objectives of water bodies “good ecological status”, stream stakeholders particularly rely on channel hydromorphological restoration. As a main cause of river hydromorphological alteration, dam dismantling in order to remove the pressure on the hydrosystem is among the most common operations. But even by allowing hydrol...
Poster
Full-text available
Interactions between the dynamics of a small "landslide catchment" and new infrasctructure development: the Ghatte khola, Myagdi District, Nepal Himalaya. Geophysical Research Abstracts, Vol. 21, EGU2019-3653-2, 2019
Conference Paper
Full-text available
Small river catchments play a major role in the overall denudation of the Himalayas, because they may generate extreme geomorphic events. Their potential impacts on the morphology and dynamics of trunk rivers may also affect new infrastructure and settlements located along the valley floor. The Ghatte Khola, an intermittent tributary of the Kali Ga...
Article
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L'article présente un travail multidisciplinaire associant urbanisme, écologie et sciences du paysage pour aborder la conception et la planification d'un espace résidentiel à haute valeur écologique
Article
Full-text available
The Peynin catchment (15 km 2) is prone to catastrophic floods (June 1957-Recurrence Interval R.I.>100 yr), June 2000 (R.I.-30 yr) with serious damages to infrastructure and buildings located at the outlet. In this paper, PIT tags tracers and Vensim modelling software are used to better assess the sediment delivery unsteadiness, and more specifical...
Book
Full-text available
Source, artère, exutoire, la rivière reste indissociable de la vie des villes. Depuis l’origine du « phénomène » urbain, villes et rivières entretiennent un lien organique puissant, vital, mais aussi ambivalent et marqué par les ruptures, les inondations, les catastrophes. Les rivières font et défont les villes qui, à leur tour, les façonnent, les...
Conference Paper
Full-text available
An unsteady flow numerical model based on the solution of the 1-D De Saint Venant-Exner equations was developed and validated against the results of a field flushing experiment that was carried out in the year 2014 within a combined sewer trunk of the Paris sewer system. The comparison of numerical and experimental results showed that the model may...
Article
Full-text available
Vulnerability is a complex concept involving a variety of disciplines from both the physical and socio-economic sciences. Currently, two opposite trends exist: the physical approach in which vulnerability is analysed as a sum of potential impacts on elements at risk and the social approach in which vulnerability is mostly viewed as a combination of...
Conference Paper
Full-text available
The Saint - Sauveur dam was built in 1992 in the middle section of the Buëch River. Downstream from the dam, a pluri - metric channel incision is observed. In order to restore active channel and habitats, around 44,000 m3 of gravels were excavated in the proximal part of the reservoir and reinjected downstream from the dam in September 2016. The ai...
Poster
Full-text available
Geomorphic responses of the channel through repetitive high-resolution topographic surveys of the restored reach • Drac restoration site
Article
Full-text available
Geomorphological, geological and geophysical investigations were carried out to estimate the amount of sediments stored in the Peynin catchment of about 15 km², situated on the Queyras valley, on the Southern French Alps. Sediment storages were identiied, characterized and mapped on GIS from extensive ieldwork. Based on these data, two models of se...
Article
Full-text available
The upper Guil watershed (317 km²) in the Queyras is characterized by a lithology composed of 90‑95% of schists, supplying a high, fine and coarse sediment load to the active channel. The Guil River is subject to high magnitude/low frequency, flash‑lood events. Most of the sediment load in the main channel of the Guil River comes from small torrent...
Article
Full-text available
The upper Guil watershed (317 km²) in the Queyras is characterized by a lithology composed of 90‑95% of schists, supplying a high, fine and coarse sediment load to the active channel. The Guil River is subject to high magnitude/low frequency, flash-flood events. Most of the sediment load in the main channel of the Guil River comes from small torren...
Chapter
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Gabes region, located on the southeastern coast of Tunisia, is characterized by unique maritime oases in Mediterranean basin.
Article
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An innovative scour chains device composed of active UHF RFID tags is proposed to survey the bed active layer. This device is tested on three cross-sections deployed along two large Alpine braided rivers: the Drac and the Vénéon. A specific field deployment procedure is developed, using a technique of drilling with a tube and a jack-hammer. After e...
Poster
Full-text available
Under the effect of artillery, the First World War greatly modified the landscapes along the Western Front. In Verdun, where nearly 60 million of shells were fired during the year of the battle (1916), the bombardments exposed the ground and sculpted a lunar landscape on a territory of approximately 175 km². On the right bank of the Meuse River, to...
Presentation
Full-text available
Since 2000, the implementation of the Water Framework Directive (WFD) aims at improving ecological and geomorphological state of European rivers through dam removal. Countless studies have been led to evaluate its consequences on hydromorphological behavior of the river system and on sediment transport processes. They generally focus on large river...
Presentation
Full-text available
In 2013, an airborne LiDAR mission conducted over the Verdun battlefield has brought to light the relief inherited from the First World War that was until now concealed by the Verdun forest planted in the 1930’s. The digital terrain model (DTM) collected with centimetre level accuracy reveals the existence of a huge number and range of small-scale...
Article
Full-text available
Vulnerability is a complex concept involving a variety of disciplines from physical and socio-economic sciences. Currently, two opposite trends exist: the physical approach in which vulnerability is analysed as potential impacts on the exposed elements; and the social approach in which vulnerability is viewed as a combination of socio-economic vari...
Presentation
Full-text available
By its unprecedented industrial character, the First World War marked landscapes like no other conflict in the world. As a result of artillery bombardment and building facilities, the relief suffered major disturbances giving rise to millions anthropogenic landforms of warfare origin on the Western front: shell craters, trenches, shelters and gun s...
Article
The results of a field experiment to evaluate the scouring effect of a single flush operation in a compound-section sewer channel in Paris, France, are presented in this paper. Full monitoring of the experiment allowed identifying flush-related transport/deposition key processes playing a role on the evolution of the deposited sediments. Overall, t...
Article
From the database HISTRHONE we extracted 1483 hydro-meteorological events from AD1300 to 2000, which occurred in the Lower Rhône Valley (LRV). A total of 1548 historical documentary records gave us ca. 5000 references (3,4 references per event). Daily heights of the Rhône River at Beaucaire and Arles are also available, from 1816 and 1829 respectiv...
Presentation
Full-text available
Parmi les nombreuses études menées en géomorphologie fluviale, la plupart s’oriente vers les cours d’eau dynamiques, à charge grossière et de grande taille, tandis que peu s’intéressent à la dynamique actuelle des rivières de faible énergie. Cette étude propose d’évaluer les capacités de réajustements post-décloisonnement de l’Yerres, affluent de...
Article
Full-text available
Résumé Cent ans après la Grande Guerre, les traces des champs de bataille restent présentes dans les paysages du Nord-Est de la France. En 2013, une prospection par LiDAR aéroporté de la forêt domaniale de Verdun a mis en évidence sous forme d’images 3-D à haute résolution les vestiges de guerre masqués par le manteau forestier. Cette étude explor...
Article
Full-text available
L’étude propose un suivi de la mobilité de la charge de fond grossière (D50 = 63 mm) de l’Argent Double, affluent de rive gauche de l’Aude, en utilisant la technologie RFID (Radio Frequency Identification), qui permet de détecter les PIT tags (Passive Integrated Transponders) insérés dans les particules du lit, couplée à la modélisation numérique....