Kapuas River - Indonesia
The Kapuas River (or Kapueas River) is a river in the Indonesian part of Borneo island. At 1,143km (710 miles) in length, it is the longest river of Indonesia and is the major waterway connecting the centre of the island with its western coast. The river basin is surrounded by mountain ranges and filled with rainforest. It originates in the Muller mountain range and flows west into the South China Sea creating an extended marshy delta. The delta is located west-southwest of Pontianak, the capital of West Kalimantan province. The river flows through dense tropical forests and the rich flora and fauna are the subject of international research. The Borneo rainforest is 140 million years old, making it one of the oldest rainforests in the world. There are about 15,000 species of flowering plants with 3,000 species of 221 species of terrestrial mammals and 420 species of resident birds in Borneo. There are about 440 freshwater fish species in Borneo About 350km from the source lies a system of Kapuas Lakes which are connected to the river by numerous channels. There are two national parks on the river banks, Betung Kerihun with an area of 8,000 km2 and Danau Sentarum (area 1,320 km2) including the Kapuas Lakes. Otters and crocodiles are common while Agile gibbons, Muller's Bornean gibbons, Prevost's squirrels and treeshrews inhabit the trees above the river.