Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 13.
  1. Library Resource
    Articles et Livres
    décembre, 2012
    Algérie

    Due to constant decrease in farmlands, it is important to identify the best lands useful for sustainable agriculture (productive and profitable agriculture that protects the environment and that is socially equitable). This requirement has resulted in the development of land suitability maps for agriculture by combining several factors of various natures and of differing importance.

  2. Library Resource
    Articles et Livres
    décembre, 2013
    Indonésie, Kenya, Inde, Tunisie, Chine

    The impact of land use changes on sustainable development is of increasing interest in many regions of the world. This study aimed to test the transferability of the Framework for Participatory Impact Assessment (FoPIA), which was originally developed in the European context, to developing countries, in which lack of data often prevents the use of data-driven impact assessment methods. The core aspect of FoPIA is the stakeholder-based assessment of alternative land use scenarios.

  3. Library Resource
    Articles et Livres
    décembre, 2013
    Algérie

    Landslides are the most common hazard in mountainous regions of northeast Algeria. In this study, landslide hazard zonation of Souk Ahras province was carried out using a Raster-based GIS and statistical processing. Landslide locations were defined from interpretation of aerial photographs and field surveys. Rotational, planar and complex landslides were identified.

  4. Library Resource
    Articles et Livres
    décembre, 2011
    Europe, Afrique septentrionale

    Mediterranean areas of both southern Europe and North Africa are subject to dramatic changes that will affect the sustainability, quantity, quality, and management of water resources. Most climate models forecast an increase in temperature and a decrease in precipitation at the end of the 21st century. This will enhance stress on natural forests and shrubs, and will result in more water consumption, evapotranspiration, and probably interception, which will affect the surface water balance and the partitioning of precipitation between evapotranspiration, runoff, and groundwater flow.

  5. Library Resource
    Articles et Livres
    décembre, 2012
    Soudan

    Two Landsat images, acquired in 1987 and 2008, were analyzed to evaluate desertification processes in central North Kurdufan State (Sudan). Spectral Mixture Analysis (SMA) and multitemporal comparison techniques (change vector analysis) were applied to estimate the long-term desertification/re-growing of vegetation cover over time and in space. Site-specific interactions between natural processes and human activity played a pivotal role in desertification. Over the last 21 years, desertification significantly prevailed over vegetation re-growth, particularly in areas around rural villages.

  6. Library Resource
    Articles et Livres
    décembre, 2012
    Algérie

    Due to constant decrease in farmlands, it is important to identify the best lands useful for sustainable agriculture (productive and profitable agriculture that protects the environment and that is socially equitable). This requirement has resulted in the development of land suitability maps for agriculture by combining several factors of various natures and of differing importance.

  7. Library Resource
    Articles et Livres
    décembre, 2011
    Égypte

    Detecting soil degradation and recognizing its various types is a necessity to take the practical measures for combating it as well as conserving and keeping the agricultural soil healthy. The present study aims at monitoring soil degradation process within the last four decades in the middle part of Nile Delta. To fulfill this objective, Landsat ETM images and digital elevation model (DEM) are used to produce the physiographic map of the studied area at the landform level.

  8. Library Resource
    Articles et Livres
    décembre, 2013
    Maroc

    In Morocco land degradation – mainly caused by soil erosion – is one of the most serious agroenvironmental threats encountered. However, only limited data are available on the actual magnitude of soil erosion. The study site investigated was an agricultural field located in Marchouch (6°42′ W, 33° 47′ N) at 68 km south east from Rabat. This work demonstrates the potential of the combined use of ¹³⁷Cs, ²¹⁰Pbₑₓ as radioisotopic soil tracers to estimate mid and long term erosion and deposition rates under Mediterranean agricultural areas.

  9. Library Resource
    Articles et Livres
    décembre, 2011
    Maroc

    Gully erosion is responsible for a substantial amount of soil loss and is generally considered an indicator of desertification. Hence, mapping these gully features provides essential information needed on sediment production, identification of vulnerable areas for gully formation, land degradation, and environmental and socio-economical effects.

  10. Library Resource
    Articles et Livres
    décembre, 2013
    Sénégal, Soudan, Afrique occidentale

    Recent remote sensing studies have documented a greening trend in the semi-arid Sahel and Sudan zones of West Africa since the early 1980s, which challenges the mainstream paradigm of irreversible land degradation in this region. What the greening trend means on the ground, however, has not yet been explored. This research focuses on a region in central Senegal to examine changes in woody vegetation abundance and composition in selected sites by means of a botanical inventory of woody vegetation species, repeat photography, and perceptions of local land users.

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