 Irrigation demand is covered mostly by surface irrigation, and partially (13%) by groundwater.According to FAO, 125,000ha and 80,000ha are affected by drainage and salinity problems, respectively.The majority of which are located in the Valleys such as Cibao, Santiago Montecristi, Azua, San Juan de la Manguana, Neyba y Barahona as well as downstream Yuna and the eastern coastal area, in the provinces of Maria Trinidad Gracias y Altagracia respectively.