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Il y a 10 éléments de contenu liés à terres arides sur le Land Portal.

terres arides

Drylands: tropical and temperate areas with an aridity index (annual rainfall/annual potential evaporation) of less than 0.65

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Publication évaluée par des pairs
mai 2020
Burkina Faso
République centrafricaine
Cameroun
Algérie
Érythrée
Éthiopie
Mali
Mauritanie
Niger
Nigéria
Soudan
Sénégal
Soudan du Sud
Tchad

Desertification is defined as land degradation occurring in the global drylands. It is one of the global problems targeted under the Sustainable Development Goals (SDG 15). The aim of this article is to review the history of desertification and to evaluate the scientific evidence for desertification spread and severity.

Rapports et recherches
janvier 2017
Afrique orientale
République-Unie de Tanzanie

Arid, semi-arid and dry sub-humid areas cover 61 % of Tanzania (United Republic of Tanzania, 1999) and, over the past decades, several restoration projects have worked toward reversing degradation in these areas (Kikula, 1999; Kisanga et al., 1999).

Articles et Livres
juillet 2015
Afrique
Ghana

Africa has been at the centre of a "land grab" in recent years, with investors lured by projections of rising food prices, growing demand for "green" energy, and cheap land and water rights. But such land is often also used or claimed through custom by communities. What does this mean for Africa? In what ways are rural people's lives and livelihoods being transformed as a result?

Articles et Livres
novembre 2013
Asie méridionale
Inde

Drylands are characterized by physical water scarcity, often associated with land degradation and
desertifi cation. Other factors that contribute to these problems include high population densities,
unwise agricultural practices and overgrazing. However, while desert ecosystems are fragile and

Articles et Livres
novembre 2012
Asie méridionale
Inde

Dryland (arid and semi-arid) ecosystems occupy more than 41% of global land area and are home to 2.5 billion people. More than 50% of South Asia’s dryland ecosystems are located in India. Drylands contribute about 40% of the total food grain production and support two thirds of livestock population.

Rapports et recherches
mai 2010
Asie
Chine

Soil erosion is a major problem in the Yellow River Basin: the river is one of the most

sediment-laden in the world. Although there is a rainfall gradient from 750 mm in southern

Shandong, to 200mm per year in northern Ningxia, most of the rainfed cropping area is in

regions with more than 400 mm per year – it is here that the project concentrated.

Rapports et recherches
janvier 2003
Global

This document outlines the necessity of formulating development policies specifically targeted at pastoralists and their livelihoods. The author reports that pastoralists have generally been ill-served by development policies and actions because of myths suggesting that pastoralists were 'backward'. Previous policies focused on changing pastoralists into something more ‘modern' or progressive.

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