Abstract
The "Systèmes d'Alerte Précoce" - the SAPs - of Chad and Mali have been in operation since April 1986. Their purpose is to forecast (or more realistically, detect as early as possible) food shortages in the drought-prone areas of each country. They are based on a multidisciplinary strategy, taking into account all relevant phenomena, from meteorology to nutritional status, and are implemented through the governmental networks. The present experience shows that, compared with the devastations due to famine and the cost of emergency food aid, they are not that expensive and they seem sustainable over the long term. "Faultless" prediction is not yet the rule, but several procedures permit progressive improvement in the ability of the systems to analyse and interpret. This paper explains the functioning process of the SAPs and presents several operational results. Additionally, it covers innovative concepts that have proved to be successful, such as the "participative information network".
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