By Mohamed Tahar, Lamia Boureboune (auth.), Alberto Marini, Mohamed Talbi (eds.)
This e-book collects the result of a realistic event of survey, during the direct keep an eye on of satellite tv for pc photos from excessive to medium answer, over parts subjected to desertification difficulties. the issues of the neighborhood inhabitants are heavily tied to the equilibrium within the administration of the territory, that is compromised through the problems of retaining conventional methodologies of administration. the hot survey applied sciences, in response to the distant Sensing and Geographic info approach, enable studying the main points of the current state of affairs and indicate the dynamism of the phenomena and the affects with anthropogenic activities.
Training has been performed within the Tozeur quarter, in valuable Tunisia, the place members had the opportunity to research at the box a chain of alternative facets. It has additionally been attainable to debate comparable stories in far-off territories and the significance of the actual approaches of desertification. through the improvement of the extensive education at the task, visits to entrepreneurial truths about the administration of the territory were performed. The analyzed quarter reveals in tourism a solution to the must haves of enhancing the residing stipulations of the population.
Specialists from twelve countries provided activities of administration of the territory, with special awareness on environmental protection and the stipulations of the territory. From the observations performed the fragility of the panorama of the oases has emerged, that are subjected to overall anthropogenic administration and as a result heavily associated with the provision of the really expert employees within the conventional methodologies. it really is average that the administration of the lands alterations in response to sleek applied sciences, yet, with a too quick speed, this evolution hazards to disillusioned the administration of the territory. The alternate of knowledge, the power to map the differences, the discussion among the elements, will want the upkeep of the political defense within the Mediterranean zone. This adventure of cooperation and organization constitutes a precedent for the improvement of a method of excessive schooling classes to be supplied to the neighborhood groups for the typical wellbeing.
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Extra resources for Desertification and Risk Analysis Using High and Medium Resolution Satellite Data: Training Workshop on Mapping Desertification
Example text
Since 1972, the Institute of Arid Regions has been leading studies regarding the inventory and monitoring of desertification, particularly through remote sensing. These studies actually show the devastating consequences of farming machines; especially poly-discs plough (Talbi, 1993). Therefore, mechanization entailed considerable adverse results because of the use of tools non-adapted to the climatic conditions and the type of soils. This is why, within few decades, damages were more important than those suffered by the region for whole centuries.
After this brief survey on physical conditions, let’s analyze the main trends of the environmental dynamics in the Nefzaoua. Two periods may be distinguished, the first from the beginning of the century to 1985, and the second one from 1985 to date. 1 The 1905 to 1985 period During that period, a first analysis of maps dating from the beginning of the century (1905) shows that the southern Nefzaoua region was very little populated, and that the landscape mainly included Shotts (playas) and Dunes (sand accumulations) (Fig.
7). The local experience that has been acquired and passed down for centuries relies on the following principle: never try to force environment or to control nature, but adapt yourself. Hence, local experience has set up a series of guidelines that govern the relations between men and their “heritage” resource, namely including: • • • • Management of scarcity, that consists in knowing adequately the limits beyond which resources should not be used, in order to avoid risking their degradation. Management of time is tightly connected with the previous notion, since time is the factor that determines the degradation of the resource.