The environmental degradation, anarchic occupation of space makes the watersheds of Haiti are very sensitive to risks of erosion, enravinement and flooding. Management programs are no longer limited to the treatment of gullies or the development of the slopes, but include a component to protect lives and property as they provide for risk mitigation and disaster.
Several parameters must be diagnosed prior to develop a management plan for a watershed. Among these parameters, the aspect of the use of water, access to basic services is fundamental.
The watershed of the Grande Rivière du Nord (GRN) offers major advantages to justify the measures of planning. It is almost located at the edge of the border between Haiti and Dominican Republic. It has one of the country’s hydroelectric dams. With its high average rainfall and geomorphology, the watershed has the agro-climatic conditions needed to produce a variety of profitable crops. However, the watershed suffers from some shortcomings. The road network is low, water resources remain unexploited. A single stream of 70 was recorded with a diversion dam for irrigation. Access to health care and education is also very limited.
To better appreciate the actions, the constraints of the watershed of GRN will be reduced by sub-watershed. In light of the study, the watershed of GRN has 10 sub watersheds with different physiographic features. Prioritization of a sub-watershed is based on various criteria. Using the method with the weighted sum aggregation (WSA), a method of multi-criteria analysis, has to rank sub-watersheds in order of prioritization as the basis of economic, social, technical and environmental. The watershed of Caracol was selected as the sub-watershed to prioritize for future interventions.
Key words : Watershed, management plan, risk, water resources, multi-criteria analysis