As the world reviews its progress in tackling global poverty and achieving the Millennium Development Goals (MDGs), drylands can no longer be ignored. Drylands account for more than a third of the world’s land surface and more than 2 billion of its people. Yet for too long, drylands and their inhabitants have been neglected in development processes.

More than two billion people depend on the world’s arid and semi-arid lands. Preventing land degradation and supporting sustainable development in drylands has major implications for food security, climate change and human settlement. This report, issued at the beginning of the United Nations Decade for Deserts and the Fight against Desertification, sets out a shared strategy by UN agencies to rise to the challenge of addressing the special needs of these vital zones.

La terre — une ressource vitale pour la population mondiale

The economic dimension of desertification, land degradation and drought (DLDD) is increasingly gaining importance.

For this reason, the UNCCD has launched an initiative to help make the economic side of desertification, land degradation and drought (DLDD) an integral part of policy strategies and decision-making. An important step in this direction was the Partnership meeting on the Assessment of the »Economics of Desertification, Land Degradation and Drought« ( EDLDD), held December 14 – 15, 2010.

Soil erosion due to accelerating runoff in various land cover types pose a serious threat to the long term sustainability of the fragile Himalayan landscape characterized by subsistence farming. Delimitation of high runoff zones, fostering soil erosion in the agricultural dominated watersheds is thus a necessity for watershed managers, NGO’s, urban planners, policy makers, and municipal administrations. The approach is practical, SWAT is a straightforward modeling system using GIS information. The BMP is also a very practical approach to mitigation of runoff accumulation on sub basin.

This issue of Water Policy Briefing is based on research presented in When ?Conservation? Leads to Land Degradation: Lessons from Ban Lak Sip, Laos (IWMI Research Report 91) by Guillaume Lestrelin, Mark Giordano and Bounmy Keohavong. The research was carried out by the Managing Soil Erosion Consortium (MSEC)?a multi-country collaborative effort to better understand land degradation, and potential solutions, in upland areas of Southeast Asia. MSEC is coordinated by IWMI with substantial contributions from France?s Institute of Research for Development (IRD).