S. Defossez

S. Defossez
Paul Valéry University, Montpellier 3 · Département de Géographie - Aménagement

PhD

About

45
Publications
7,123
Reads
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370
Citations
Additional affiliations
September 2014 - present
Paul Valéry University, Montpellier 3
Position
  • Professor (Assistant)
Description
  • Teacher and researcher. https://lagam.xyz/2021/04/19/1467/
Education
September 2000 - September 2009

Publications

Publications (45)
Article
Full-text available
Reducing the risk of disaster linked to major flash floods requires multi-scale preparedness measures. The Sendai Framework for Disaster Risk Reduction encourages the involvement of vulnerable people as technical measures are often insufficient to decrease the risk of disaster. Yet local authorities often struggle to motivate people to prepare, eve...
Article
Full-text available
En contexte post-catastrophe les moyens aériens représentent une solution efficace pour agir avec rapidité dans un environnement dévasté. Parmi ces moyens, la flexibilité, l'atout économique et les possibilités que peuvent offrir les aéronefs télépilotés, aussi appelés drones, notamment en termes de reconstitutions 3D et de cartographie, en font un...
Article
Full-text available
The objective of our study is to establish an assessment of four volcanic hazards in a country threatened by the eruption of the OlDoinyo Lengai volcano. The last major eruption dates back to 2007-2008 but stronger activity in 2019 has revived the memory of volcanic threats to the Maasai and Bantu communities and human activities (agro-pastoral and...
Article
Full-text available
The intense hurricane season of 2017 in the North Atlantic brought a number of major hurricanes including Hurricane Irma (cat. 5), which landed on the French islands of St. Martin and St. Barthélemy. These two French Overseas Collectivities, separated by a distance of some 20 kilometres, have very different territorial and social characteristics. T...
Article
Cet article explore les relations entre les caractéristiques territoriales et les capacités de relèvement d’une petite île caribéenne, confrontée à un événement cyclonique exceptionnel : Saint-Barthélemy face à IRMA (sept. 2017). L’analyse repose sur l’acquisition de données récoltées in situ dans le cadre d’un retour d’expérience (RETEX) scientifi...
Article
Full-text available
This paper investigates the resilience of traditional societies from Small Island Developing States in the face of disaster. It focuses on tropical cyclone Pam that impacted Vanuatu in 2015. Drawing upon focus group discussions using participatory tools in disaster-affected villages between 2015 and 2017, it examines both the recovery challenges fa...
Article
Full-text available
This empirical and interdisciplinary study investigates the contribution of deeply enrooted social-political factors to the accumulation of exposure and vulnerability and amplification of cascading impacts of disasters, with implications on the creation and reinforcement of path dependency maintaining social-ecological systems on a maladaptive traj...
Book
Full-text available
Le projet TIREX (Transfert des apprentissages de retours d'expérience scientifiques), dirigé par Pr. Frédéric LEONE, part du constat que les résultats des retours d'expérience scientifiques ne sont pas assez communiqués aux acteurs des territoires concernés. En analysant la saison cyclonique 2017 dans les Petites Antilles, TIREX répond à la fois à...
Article
Full-text available
The hurricane season 2017 in the North Atlantic was intense. The events recalled the exposure of the West Indies to these phenomena sometimes devastating, such as the cyclone Irma which caused heavy losses on the French islands of Saint-Martin and Saint-Barthélemy. The post-event phase sometimes gives rise to an experience feedback (RETEX), which r...
Article
Full-text available
L’augmentation du volume des débris, les impératifs de protection de l’environnement, le coût de la collecte et du traitement pour les collectivités territoriales ou les entreprises sont des défis de plus en plus complexes dans les territoires soumis à des catastrophes naturelles, technologiques ou géopolitiques (conflits) destructrices. Le passage...
Article
Full-text available
In the aftermath of a disaster, the debris caused by the destruction of property or vegetation become a crucial problem. The increase in the volume of debris, the growing requirements for environmental protection, the cost of waste collection and treatment for local authorities or companies are increasingly complex challenges for lands subject to n...
Presentation
La compréhension des éruptions futures et de leurs conséquences potentielles est un élément important de la réduction des risques de catastrophes volcaniques. Les scénarios constituent un compromis utile entre les approches probabilistes et déterministes. L'objectif de notre étude est d’établir un diagnostic des risques volcaniques en Tanzanie, pay...
Article
Full-text available
À travers l’exemple du Cambodge, cet article vise à montrer le poids du contexte territorial dans la prise en compte des risques naturels dans les politiques publiques nationales et les choix de stratégies de gestion. Le Cambodge est exposé à des phénomènes extrêmes récurrents et présente des caractéristiques socio-économiques, démographiques et po...
Article
Il s'agit de comparer plusieurs zones inondables disponibles sur le Bitoulet, un petit cours d'eau affluent de l'Orb dans sa Haute Vallée avec les zones inondées en septembre 2014. Suite à un évènement pluvieux d'une rare intensité, les débordements du Bitoulet ont causé la mort de 4 personnes, résidant dans un camping situé en zone inondable.
Book
Les événements naturels qu’ils soient catastrophiques ou qualifiés de petits évènements engendrent des conséquences matérielles et humaines. Ils sont révélateurs de l’état de la gestion des risques et des crises. A chaque événement ressortent des points positifs mais aussi des défaillances quant à la gestion des risques et des crises. Le RETour d’E...
Article
Full-text available
In the aftermath of a disaster, the debris caused by the destruction of property or the vegetation become a crucial problem. The increase in the volume of debris, the growing requirements for environmental protection and the cost of waste collection and treatment for local authorities or companies are challenges increasingly complex for the territo...
Article
Full-text available
La reconstruction, entendue comme l'ensemble des mesures pour rétablir un fonctionnement acceptable du territoire, est une notion de plus en plus traitée dans la littérature scientifique des risques. Elle peut faire l'objet, sans que cela soit systématique, de stratégies d'adaptation collectives et individuelles, planifiées et spontanées, aux objec...
Chapter
Livelihoods of people in the Tonle Sap Lake (TSL) area of Cambodia are complex combinations of rice-based cropping, fishery systems, mixed cash crops/home gardens, natural pond culture/aquaculture, cattle and livestock, collection of flooded forest products, and nonfarm and off-farm activities. The productivity of these activities is intimately lin...
Article
Livelihoods of people in the Tonle Sap Lake (TSL) area of Cambodia are complex combinations of rice-based cropping, fishery systems, mixed cash crops/home gardens, natural pond culture/aquaculture, cattle and livestock, collection of flooded forest products, and nonfarm and off-farm activities. The productivity of these activities is intimately lin...
Presentation
https://youtu.be/ZVf7iscLMSU Cambodge : des crises multiples et imbriquées? Une sortie de crise politico-militaire lente qui pèse sur les politiques de gestion des risques Une brève et récente histoire des évènements marquants Le choix délicat de l'aléa de référence Quelle gestion des risques ? Une gouvernance difficile
Article
Full-text available
Background Climate change and rising sea level will certainly lead to significant changes in the management of low-lying coastal areas in the coming decades. While the most recent studies in the field of coastal storms-related flooding are increasingly integrated, simultaneously addressing hazards and vulnerability, as well as population risk perce...
Article
Full-text available
Mediterranean area has often concerned area is often hit by flash foods. Grabels (city in southern France) experienced flash floods from 6-7th October 2014. During this time the river “Mosson” and its tributaries overflowed and combined with the streaming to damage near 500 homes. To evaluate the event and its impacts, we performed an analysis days...
Article
Full-text available
In France, for a long time, flood risk management has only oriented to controlling flood hazard with structural measures such as dikes. But since 1990’s many events have proved they have not totally efficient measures. So, institutions decided it’s necessary to manage flood risk with others ways like prevention. Risk management is so organize about...
Conference Paper
Full-text available
Le Projet CRISSIS vise à développer une approche intégrée et opérationnelle du risque de submersion marine sur une commune où se concentrent de forts enjeux urbains et touristiques et où l’aléa de submersion marine, important actuellement, tend à augmenter compte tenu de l’élévation progressive du niveau marin. Le travail présenté consiste en une m...
Conference Paper
Full-text available
Dans le cadre du programme de recherche CRISSIS, une analyse des perceptions et des représentations sociales sur le risque de submersion marine à Leucate est réalisée. Le projet se concentre sur trois secteurs de la commune particulièrement exposés au risque de submersion marine en raison de leur implantation, entre mer et lagune, sur un cordon lit...
Article
Full-text available
The huge aftermaths of disasters remain (too) often explained, through the media, by the climate change or by the failure of flood defenses, as was the storm Xynthia that hit the western part of France in February 2010. However such phenomena of marine flooding linked to windstorm have already struck the Atlantic coast in the past. Material and hum...
Article
Full-text available
The huge aftermaths of disasters remain (too) often explained, through the media, by the climate change or by the failure of flood defenses, as was the storm Xynthia that hit the western part of France in February 2010. However such phenomena of marine flooding linked to windstorm have already struck the Atlantic coast in the past. Material and hum...
Article
The huge aftermaths of disasters remain (too) often explained, through the media, by the climate change or by the failure of flood defenses, as was the storm Xynthia that hit the western part of France in February 2010. However such phenomena of marine flooding linked to windstorm have already struck the Atlantic coast in the past. Material and hum...
Article
People who have suffered from a disaster ask for more protection and security. If public policies are not able to protect them, people will take individual measures themselves against hazards. In the department of Aude (southern France), the Risk Prevention Plan (Plan de Prévention des Risques) was applied in 2003 and approved in 2008. In November...
Article
Full-text available
This paper analyses the fatalities related to two recent floods in France. The first flood event was a nightly sea surge due to Xynthia windstorm on the Atlantic coast in February 2010 the 28th. The second was a flash flood which struck the department of Var in the French Mediterranean region in June 2010 the 15th. The death tolls are respectively...
Article
Full-text available
This paper aims to analyse and compare the loss of life that occurred during two recent floods in France. The first flood was due to a sea surge triggered by the storm called Xynthia that hit the Atlantic coast on 28 February 2010 (41 flood-related deaths). The second was a flash flood that struck the Var Department in the French Mediterranean regi...
Article
Full-text available
The plans for flood risk prevention in France constrain urban development and land use. However the patterns of application these restrictions vary, and sometimes reveal considerable pressures arising from individual, industrial and collective interests. This paper aims to discuss certain liberties that the mayors-elect take in the application thes...
Article
Scope for freedom for mayors-elect in the application of the plans for flood risk prevention The plans for flood risk prevention in France constrain urban development and land use. However the patterns of application these restrictions vary, and sometimes reveal considerable pressures arising from individual, industrial and collective interests. Th...
Article
Full-text available
Flood risk management has long exclusively focused on controlling flood hazard. Structural or soft hazard-related measures such as dikes, dams or catch basins often prevail over prevention. However, both the frequent failure of those structural measures and the increasing damage related to floods compelled practitioners to come up with holistic and...
Article
Full-text available
La gestion du risque inondation s'est longtemps tournée exclusivement vers la maîtrise de l'aléa. Que ce soit des ouvrages de génie civil (digue, barrage) ou des mesures plus douces comme les champs d'expansion des crues, la protection a primé sur la prévention. Cependant les limites des mesures structurelles et le coût croissant des dommages ont a...

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Projects

Projects (10)
Project
The project objectives then focus on the features of urban flooding at individual (local) scale. They include understanding the hydraulic processes, and related risk level, at the scale of one building and assessing how this knowledge can be used to reduce damages and fatalities
Project
De la caractérisation des aléas et des risques volcaniques aux outils opérationnels de gestion de crise: le cas des communautés traditionnelles massaï face aux menaces du Ol Doinyo Lengaï (Tanzanie).
Project
Retour d'expérience post cyclone Irma dans les îles du nord (Antilles françaises)