Soil erosion and deposition values were estimated using pixel based landscape information and the Unit Stream Power Erosion Deposition (USPED) model, which works with the Universal Soil Loss Equation (USLE) parameters. The USPED model was adapted to Ethiopian conditions based on evidence from the Soil Conservation Research Programme, and calibrated and validated using data from former research stations as well as the Abbay (Blue Nile) Basin. Additionally, some of the USLE parameters were reduced in order to achieve a satisfactory approximation of sediment loss for the Abbay Basin.

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. First quantitative estimates of the global extent and severity of desertification were dramatic and resulted in the establishment of the UN Convention to Combat Desertification (UNCCD) in 1994. UNCCD’s task is to mitigate the negative impacts of desertification in drylands.

From its origins, the concept of desertification has been controversial. The prevailing confusion between two desertification visions, one that considers it as the expansion of deserts and another that emphasizes its anthropogenic component, has been transferred to society.

En el presente documento se analizan los principales temas relacionados con el desarrollo agropecuario y rural, y la situación del medio ambiente y los recursos naturales de América Latina y el Caribe en el período 1990 a 2005. El documento está estructurado en torno a cinco ejes temáticos: i) desarrollo productivo; ii) deforestación; iii) degradación y desertificación; iv) factores sociales y demográficos, pobreza, ingreso y empleo, y cambios poblacionales, y v) cambio climático y desastres naturales.

David Barrio - Oficial de Asuntos Económicos de la División de Desarrollo Sostenible y Asentamientos Humanos de la Comisión Económica para América Latina y el Caribe (CEPAL) habla sobre el ODS 15. La desertificación y la deforestación son dos grandes retos para el desarrollo sostenible de la región, pues la pérdida o daño a los recursos naturales supone graves consecuencias ambientales y económicas.

Land is very important natural resource to the human being as it provides the basis for more than 95% of human food. On the broader context, land has many other functions, e.g. provision of biological habitats and physical and connective space; regulation of hydrology and climate; storage of minerals, raw materials and historical/pre-historical records; and as a buffer to control waste and pollution. Expanding human requirements and economic activities are placing ever increasing pressures on land resources, creating competition and conflicts and resulting in suboptimal use of land.

Successive surveys related to land degradation in India, reveal that despite several announcements and policy changes, the desertification and degradation of land and forest continues to rise. It has posed serious threats to environment, biodiversity, local economy and food security. Globally and nationally, India has been very vocal to address this issue.

The people of the Sahel — that huge region stretching along the southern edge of the Sahara Desert — are still striving to recover from the fallout of the terrible droughts that have afflicted the area since 1973. Drought has shattered the momentum of socioeconomic development in Burkina Faso, Mali, Mauritania, Niger, and Senegal. According to researchers with Burkino Faso’s Institut de l’environnement et de recherches agricoles, “Rural men and women are now struggling to survive in a land that is exhausted, denuded, desiccated, and swept away by the wind and water.”

Looks at land ownership and the consequences of land degradation in Kenya.Contains interview with IDRC personnel Harmut Krugmann.

The people of the Sahel — that huge region stretching along the southern edge of the Sahara Desert — are still striving to recover from the fallout of the terrible droughts that have afflicted the area since 1973. Drought has shattered the momentum of socioeconomic development in Burkina Faso, Mali, Mauritania, Niger, and Senegal. According to researchers with Burkino Faso’s Institut de l’environnement et de recherches agricoles, “Rural men and women are now struggling to survive in a land that is exhausted, denuded, desiccated, and swept away by the wind and water.”