Résultats de la recherche
Showing items 1 through 9 of 1617.
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Library Resource
Sahara occidental, Afrique occidentale, Sénégal
Les perturbations climatiques, l’évolution démographique et les sécheresses des dernières décennies, ont contribué à une rupture d’équilibre entre les systèmes de production pastorale et agricole, au détriment des pasteurs. À côté de ce contexte écosystémique, d’autres facteurs viennent aggraver la situation pastorale dans le Sahel, en particulier le rétrécissement de l’espace pastoral, grignoté par l’expansion des terres agricoles.
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Library Resource
Publication évaluée par des pairs
The dramatic growth of the world’s population is increasing the pressure on natural resources, particularly on soil systems. At the same time, inappropriate agricultural practices are causing widespread soil degradation. Improved management of soil resources and identification of the potential agricultural capability of soils is therefore needed to prevent further land degradation, particularly in dryland areas such as Egypt. Here, we present a case study in the El-Fayoum depression (Northern Egypt) to model and map soil suitability for 12 typical Mediterranean crops.
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Library Resource
Publication évaluée par des pairs
Conversion of native lands into agricultural use, coupled with poor land management practices, generally leads to changes in soil properties. Understanding the undesirable effects of land-use and land-cover (LULC) changes on soil properties is essential when planning for sustainable land management.
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Library Resource
Publication évaluée par des pairs
Soudan, États-Unis d'Amérique, Afghanistan, Éthiopie, Bangladesh
Food aid is a critical component of the global food system, particularly when emergency situations arise. For the first time, we evaluate the water footprint of food aid. To do this, we draw on food aid data from theWorld Food Programme and virtual water content estimates from WaterStat. We find that the total water footprint of food aid was 10 km3 in 2005, which represents approximately 0.5% of the water footprint of food trade and 2.0% of the water footprint of land grabbing (i.e., water appropriation associated with large agricultural land deals).
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Library Resource
Publication évaluée par des pairs
Soil erosion is an important environmental problem that can have various negative consequences, such as land degradation, which affects sustainable development and agricultural production, especially in developing countries like Tunisia. Moreover, soil erosion is a major problem around the world because of its effects on soil fertility by nutriment loss and siltation in water bodies. Apart from this, soil erosion by water is the most serious type of land loss in several regions both locally and globally.
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Library Resource
Publication évaluée par des pairs
Soil erosion is an important environmental problem that can have various negative consequences, such as land degradation, which affects sustainable development and agricultural production, especially in developing countries like Tunisia. Moreover, soil erosion is a major problem around the world because of its effects on soil fertility by nutriment loss and siltation in water bodies. Apart from this, soil erosion by water is the most serious type of land loss in several regions both locally and globally.
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Library Resource
Publication évaluée par des pairs
This investigation aims to assess the changes of Land Use/Land Cover (LULC) and its impact on ecosystem services value in Damietta Governorate, Egypt. To fulfill this aim, Landsat data of TM5 in 2001, ETM in 2011 and OLI in 2021 were used. The Maximum Likelihood Classifier was employed to track the changes in LULC of the study area. Cellular automata (CA) and Markov model adopted from IDRISI software were used for accurate prediction of the LULC in 2031. The VALIDATE model in TerrSet was used to compare the predicted 2031 LULC with actual 2021 LULC to assess the accuracy of the model.
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Library Resource
Publication évaluée par des pairs
Rapports et recherches
Afrique, Afrique septentrionale, Amérique latine et Caraïbes, Asie, Liban, France, Océanie
Dans les pays du Sud, l’accès à la terre et à ses ressources, son contrôle et ses usages représentent des questions cruciales. Au cœur des défis de la construction de l’État, du développement agricole, de la sécurité alimentaire et de la durabilité environnementale, le foncier est aussi un marqueur identitaire et une source récurrente de conflits.
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Library Resource
This is the Arabic version of the country profile for Sudan, describing its land governance context. Online versions of this profile are available in English, French, Portuguese and Spanish.
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Library Resource
Avoiding, reducing and reversing land degradation is essential for the food security of current and future generations, for the conservation of biodiversity and the achievement of climate targets. In the current context of increased competition over land resources, rising food insecurity, and inequalities, combating land degradation is also necessary to prevent and mitigate conflict and mass displacement, which risk to destabilise countries and entire regions.
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