Every year most parts of India are affected by drought.But the Centre and State has failed so far to diagnose the drought phenomenon and to come up with a long term solution. Declaration of drought is a sensitive issue. The nature of drought is such that it does not occur in the same intensity across the Country and State and also has differential impacts. Unless this complexity is understood drought declaration will always be controversial and not transparent.

Land degradation is accelerating and drought is escalating worldwide. At the Rio+20 Conference, world leaders clearly acknowledged that desertification, land degradation and drought (DLDD) are challenges of a global dimension affecting the sustainable development of all countries, in particular developing countries. In view of this, they committed to strive to achieve a land-degradation neutral world in the context of sustainable development and to monitor land degradation globally (paragraphs 205–207 of “The future we want”).

La degradación de la tierra se está acelerando, y las sequías van en aumento en todo el mundo. En la conferencia Río+20, los dirigentes mundiales reconocieron sin ambages que la desertificación, la degradación de la tierra y la sequía son problemas de dimensión mundial que afectan al desarrollo sostenible de todos los países, en particular los que están en desarrollo.

“The great opportunity of the Anthropocene is that we can choose to learn the lessons of the past and steer a new course to a safer future.” Soils are the most significant nonrenewable geo-resource that we have for ensuring water, energy, and food security for present and future generations while adapting and building resilience to climatic change and shocks. But soil’s caring capacity is often forgotten as the missing link in our pursuit of sustainable development.

Ce livre constitue un ensemble d’informations de base sur la désertification, la dégradation des terres et la sécheresse à l’échelle mondiale, accompagnées d’une série de graphiques. Celui-ci présente les évolutions ayant eu lieu au cours des dernières décennies, en associant les questions et les priorités actuelles.

Este libro tiene como objetivo ser un manual informativo en el que se cuenta “la historia” de la desertificación, la degradación de las tierras y la sequía a escala global acompañado por una completa serie de gráficos. Este libro muestra tendencias que han tenido lugar a lo largo de las últimas décadas, combinando y conectando temas y presentando prioridades.

The earth’s climate is changing at a rate unprecedented in recent human history and will continue to do so for the foreseeable future. The impacts and risks associated with this are global, geographically diverse and increasingly being felt across a range of systems and sectors essential for human livelihoods and well-being. The more severe and far-reaching the impacts of climate change are, the greater the loss of species will be, and the greater the deterioration of drylands and the risk of desertification and land degradation around the world will be.

The challenges and threats of water scarcity to dryland populations are set to increase in magnitude and scope. As the world’s population has swollen to well over 6 billion people, some countries have already reached the limits of their water resources. With the existing climate change scenario, almost half the world’s population will be living in areas of high water stress by 2030, including between 75 million and 250 million people in Africa. In addition, water scarcity in some arid and semi-arid places will displace between 24 million and 700 million people (WWDR 2009).

Les enjeux et menaces que représente le manque d'eau pour les populations des zones arides sont voués à prendre de l'ampleur. Alors que la population mondiale a dépassé 6 milliards d'individus, quelques pays ont déjà atteint les limites de leurs réserves d'eau. En considérant le scénario actuel de changement climatique, on estime que quasiment la moitié de la population mondiale vivra en zone de fort déficit hydrique d'ici 2030, dont 75 à 250 millions de personnes sur le continent africain.

Los desafíos y retos que supone la escasez de agua para las poblaciones de las tierras secas se van a ver incrementados tanto en magnitud como en alcance. Dado que la población mundial es ya superior a los 6.000 millones de personas, algunos países han superado los límites de sus recursos acuíferos. Con el escenario actual de cambio climático, casi la mitad de la población mundial habitará áreas con grandes problemas de agua antes del 2030, lo que incluye a una población de entre 75 y 250 millones de personas en África.

The Africa–Asia Drought Risk Management Peer Assistance Project seeks to facilitate the sharing of knowledge and technical cooperation among drought-prone countries in Africa and Asia and thus to promote best practices in drought risk management (DRM) for development in the two regions. In order to establish a baseline to guide this activity, the United Nations Development Programme Drylands Development Centre (UNDP DDC) undertook a stocktaking exercise between March and June 2011 on drought impacts, causes, trends and solutions in Africa and Asia.

Les terres3 peutvent se définir comme un système destiné à générer de la productivité biologique. C’est l’infrastructure naturelle qui supporte la vie sur la planète. La quantité et la qualité de cette production dépendent du principal composant de la terre : le sol et sa fertilité. La matière organique du sol, qui provient de la végétation portée par ce dernier, est le principal composant influençant la fertilité du sol.