Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 126.
  1. Library Resource
    Rapports et recherches
    décembre, 2016
    Soudan

    The population of Sudan reached 30.9 million people in the last population census (2008), and is
    projected to reach 39.7 people by 2016, growing at a 2.8% growth rate per annum. With this rate
    of increase the population could double up in in about 16 years.
    The urban population constituted about 29.8% of the total 2008 population, which indicates that
    Sudan is predominantly rural. This high rate of population increase, and the tendency towards
    population concentration in large urban centers, constitutes one of the biggest challenges facing

  2. Library Resource
    Articles et Livres
    décembre, 2016
    Algérie, Maroc, Tunisie

    States of ecological maturity and temporal trends of drylands in Morocco, Algeria and Tunisia north of 28 N are reported for 1998–2008. The input data were Normalized Difference Vegetation Index databases and corresponding climate fields, at a spatial resolution of 1 km and a temporal resolution of one month. States convey opposing dynamics of human exploitation and ecological succession. They were identified synchronically for the full period by comparing each location to all other locations in the study area under equivalent aridity.

  3. Library Resource
    Articles et Livres
    décembre, 2016
    Argentine, Burkina Faso, République centrafricaine, Chine, Cameroun, Algérie, Érythrée, Éthiopie, Mali, Mauritanie, Niger, Nigéria, Soudan, Sénégal, Soudan du Sud, Tchad, Asie central

    It took scientists more than three decades to transform a perceived desertification crisis in the Sahel into a non-event. Looking beyond the Sahel, the chapters in this book provide case studies from around the world that examine the use and relevance of the desertification concept.

  4. Library Resource

    Land Use Policy Volume 59

    Publication évaluée par des pairs
    décembre, 2016
    Burkina Faso, République centrafricaine, Cameroun, Algérie, Érythrée, Éthiopie, Mali, Mauritanie, Niger, Nigéria, Soudan, Sénégal, Soudan du Sud, Tchad

    After the severe droughts in the 1970s and 1980s, and subsequent debates about desertification, analyses of satellite images reveal that the West African Sahel has become greener again. In this paper we report a study on changes in tree cover and tree species composition in three village landscapes in northern Burkina Faso, based on a combination of methods: tree density change detection using aerial photos and satellite images, a tree species inventory including size class distribution analysis, and interviews with local farmers about woody vegetation changes.

  5. Library Resource
    Documents et rapports de conférence
    juillet, 2016
    Afrique septentrionale, Égypte

    The overall aim of the project is to identify physical and institutional interventions to improve water management using an integrated approach across scales (from farm to main canal levels) and encompassing water quantity–quality interactions. The project’s geographical focus is the Nile Delta in Egypt.
    The project was originally planned for four years. Due to a policy change announced by the Australian Government in reducing the aid investment in the Middle East and North Africa, including Egypt, the duration of the project was reduced to three years.

  6. Library Resource
    Rapports et recherches
    février, 2016
    Afrique septentrionale, Algérie, Maroc, Tunisie, Amérique du Sud, Brésil

    Around 2.5 billion people – 30 percent of the world’s population – live in the dry areas, which cover more than 40 percent of the world’s land surface. Scarce natural resources, land degradation and frequent droughts severely challenge food production in these areas. Both North Africa (Morocco, Algeria, Tunisia) and the North East of Brazil fall under arid and semi-arid climate. Cacti have developed phenological, physiological and structural adaptations for growth and survival in arid environments where they have multiple functions (food, feed, soil conservation, etc.).

  7. Library Resource
    Articles et Livres
    janvier, 2016
    Tunisie, Afrique septentrionale

    This study was carried out at the communal rangelands of Dhahar, Saharan area of Southern Tunisia, to assess the impact of restoration and rehabilitation techniques on natural vegetation cover. Two rangeland types (Rhanterium suaveolens and Anthyllis sericea) were subjected to three management modes: two years rest (M), reseeding Stipagrostis pungens (S) and free grazing (T). In all plots, total plant cover, species richness and grass density where determined in spring 2008.

  8. Library Resource
    Articles et Livres
    décembre, 2016
    Soudan

    This study examines the socioeconomic features that underpin the expansion of groundwater-dependent irrigation in Northern State, Sudan. Groundwater development in the region serves as an economic lifeline given the poor Nile-based irrigation infrastructure and future changes in Nile hydrology. Groundwater-dependent irrigation is found to be expanding in previously uncultivated regions increasingly distant from the Nile.

  9. Library Resource
    Articles et Livres
    décembre, 2016
    Inde, Tunisie, Belgique

    This handbook is a training tool to learn how to run AquaCrop. AquaCrop is a crop water productivity model developed by the Land and Water Division of FAO to address food security and to assess the effect of environment and management on crop production. AquaCrop simulates yield response to water of herbaceous crops, and is particularly suited to address conditions where water is a key limiting factor in crop production.

  10. Library Resource
    Articles et Livres
    décembre, 2016
    Algérie, Égypte, Maroc, Afrique du Sud, Canada, Tunisie, Soudan

    The aim of the practical guidelines presented in this document is to support the adoption and usability of the criteria and indicators (C&I) for Sustainable Management of Forests and Rangelands (SFRM) adopted by the 22nd Session of the Near East Forestry and Range Commission (NEFRC). The guidelines are based on the review of existing literature and on consultations with national experts and relevant institutions in Morocco, Sudan and Tunisia regarding challenges identified in the use of the prop osed C&I for SFRM.

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