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Conflicts in marginal regions of the Horn of Africa are attributable to competition among pastoral communities for limited resources. The US national interest in the Horn of Africa emanates from the deep commitment of the US to maintain law and order in the region where terrorists can potentially exploit the conflict vulnerability of the population due to harsh climate and competition for water and grazing resources. Monitoring the status of watering holes and rivers is important not only to the pastoralists but also for better management of the environment in terms of land degradation form excessive concentration of livestock during dry times. The Livestock Early Warning System (LEWS) monitors shortfalls in livestock forage resources to support USAID's resource allocation decisions through its Office of Foreign Disaster Assistance (OFDA) programs. We propose to improve the existing LEWS Decision Support System (DSS) by adding a water resources monitoring tool using NASA data. We will characterize and monitor water supply and flood hazards along pastoral migration corridors using ASTER, SRTM and TRMM data, employing a combination of image classification, watershed delineation and hydrologic modeling tools. We propose to map seasonal migration patterns and resource utilization using GPS technology and to distribute resource-status information to migrating pastoral communities using existing satellite-based Radio-Internet (RANET) infrastructure. The synergy of forage monitoring products from LEWS, hydrologic monitoring products from USGS-EROS and the RANET dissemination system forms the basis for a unique integrated framework for producing and delivering information products that end-users at OFDA and in the field can use in making disaster mitigation decisions in near real time. We will produce benchmark reports on the performance of this prototype project on the use of NASA data to address three of NASA's priority application areas: Homeland Security, Disaster Management and Ecological Forecasting to maintain a sustainable ecosystem in developing countries, particularly in Africa.