Le feu, la brousse et la savane. Modélisation spatiale de la dynamique des paysages soudaniens (Burkina Faso)

Sébastien Caillault 1
1 LETG - Caen - Littoral, Environnement, Télédétection, Géomatique
LETG - Littoral, Environnement, Télédétection, Géomatique UMR 6554
Abstract : In Sudanese landscapes that are burned during the dry season, major changes caused by agricultural intensification have reconstructed spaces and management practices associated with them. In this context, fire, symbol of the traditional forest degradation concept, becomes a new tool for managing the threatened savanna in an ecological way. To analyze these complex changes of landscapes and representations associated with modern issues, an intricate and spatial characterization of fire has been developed. This work, central to this research, thus allows for better understanding of the changing patterns of management and landscape trajectories. Unlike observations relegating practices of fire as uncontrolled or anarchistic during the dry season, we show that the complex dynamics of bushfires are mainly structured by the combination of regular local practices and soil-moisture factors. The interaction between the local time of the fire setting and the combustibility of the vegetation is the key point of fire regimes observed at the regional level. The last rains correspond to the ignition of the first flames on skeletal soils and fires run progressively through environments to deeper soils where the vegetation remains moist longer. The use of spatial analysis and simulation has facilitated exchange between field observations and regional maps to explore the local interactions between the setting of fires and seasonal dynamics of space. However, if the seasonal dynamics are confirmed, this also reveals above-biophysical variables, the emergent role of conservation areas, and heterogeneous visions of management of rural areas.
Document type :
Theses
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00625721
Contributor : Sébastien Caillault <>
Submitted on : Thursday, September 22, 2011 - 5:26:35 PM
Last modification on : Friday, October 18, 2019 - 2:54:05 PM

Identifiers

  • HAL Id : tel-00625721, version 2

Citation

Sébastien Caillault. Le feu, la brousse et la savane. Modélisation spatiale de la dynamique des paysages soudaniens (Burkina Faso). Géographie. Université de Caen, 2011. Français. ⟨tel-00625721v2⟩

Share

Metrics

Record views

2100

Files downloads

1053