Suriname has seven major streams draining toward the Atlantic Ocean (see Table 1). The largest are the Marowijne and Corantijn rivers that form the country’s borders, respectively, in the east and the west. These two rivers flow northward and drain almost 58% of the country. The Coppename and the Suriname river also flow northward and together drain about 24% of the country. The smallest rivers are the Nickerie, Saramacca, and Commewijne rivers, which drain 16% of the country. The final 2% of the country consists of coastal areas with direct drainage into the Atlantic Ocean. The Suriname rivers drain on average about 4,800 m³/s (756 mm/year) freshwater into the Atlantic ocean. The main rivers are tidal and contain brackish water in the coastal area. The map below shows the salt water borders in the main rivers and the catchment areas of the main rivers.