Sabangau National Park (sometimes spelled
Sebangau) is a national park in
Central Kalimantan, a
province of Indonesia in
Kalimantan, the
Indonesian part of the island of
Borneo established in 2004. Between 1980 and 1995 the site was a massive logging concessions area. After 1995, the park became a site for illegal logging, which resulted in up to 85 percent of the 568,700-hectare total park area being destroyed. By 2012, less than 1 percent of the park's total area has been reforested and several centuries is needed to restore it to its pre-logged state.
The national park is centered on Sabangau River, a
blackwater river. It flows through the Kelompok Hutan Kahayan or Sabangau
peat swamp forest (5,300 km
2), between the
Katingan and
Kahayan rivers. The peat swamp forest is a dual ecosystem, with diverse tropical trees standing on a 10m-12m layer of
peat - partly decayed and waterlogged plant material - which in turn covers relatively infertile soil.
The severely degraded eastern part of the forest, between the Sabangau and the Kayahan, is officially designated for agriculture. However, since the failure of the
Mega Rice Project, which drained large areas of
peat forest in an attempt to create rice paddies, no further efforts are being made to make it suitable for this purpose.
The forest has been damaged by legal and
illegal forestry. There is no longer any continuous
forest cover where orangutans may cross the river. A satellite view shows a grid of logging roads throughout most of the forest.
However, the western part is now protected as either National Park or National Laboratory Research Area. A study of the area shows that the hydrological integrity of the forest has been maintained, and it is therefore ecologically resilient, although since it is close to the regional capital
Palangkaraya it remains at risk.
The forest is home to the world's largest
orangutan population, estimated at 6,910 individuals in 2003, and other rare or unique species. The total
agile gibbon population in the Sabangau catchment is estimated to be in the tens of thousands, but is declining fast.
Vulnerable bird species include the
large green pigeon (
Treron capellei) and possibly
Storm's stork (
Ciconia stormi) and
lesser adjutant (
Leptoptilus javanicus). Efforts are underway to establish long-term ecological monitoring in the forest.