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As is typical for the Caribbean region, the climate is marine tropical with a hot and humid summer and a cooler and drier winter season. There are two distinct rainy seasons; one April to June the other October to November. Leogane has no long term records of its climate but we have installed a hydroclimate station that has been producing data since 2012. Haiti is hit, on average, by one cyclone (defined as a climatic event with windspeed over 250 km/h) with devastating effects every five years.

The ~180 km2 coastal plain is underlain by a productive shallow unconfined aquifer that typically can be accessed at depths of 5-10 meters below the surface. At greater depths (25-30 meters) a confining layer separates the unconfined aquifer from a deeper confined one. Two rivers bisect the commune and are accompanied by a multitude of smaller tributaries, irrigation canals, and drainage ditches.


Léogâne’s plain is stroke southward by the prolongation of the Massif de La Selle which is itself the northwestward prolongation (100 km) of the Sierra de Bahoruco of the Dominican Republic. The plain consists mainly of alluvium deposited by the Momance, Rouyonne, and Cormier Rivers while the mountains are composed mainly of limestone.

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