Usun Apau
Usun Apau is an inaccessible, forest-covered plateau of volcanic origin in the Malay part of Borneo . It is located in the upper river system of the Rajang in the state of Sarawak , about 45 km from the Indonesian border . As it is located in a remote jungle region and all rivers that start from here are impassable, it was only discovered in 1951.
The area is largely unpopulated, mainly Penan live here . The predominant types of vegetation are tropical primary forest , kerapa and kerangas . Uzun Apau has been proposed as a national park, since, among other endemic to Borneo Bulwer's Pheasant occurs.
description
Usun Apau extends over an area of about 1500 km² and has an average height of about 1000 m above sea level. d. The highest elevations on the plateau are three extinct volcanoes - the approximately 1370 m high Selidang as well as the Kenawang and the Mabun, which are slightly lower at around 1300 m. In the north, east and west the plateau is bounded by approximately 300 m high rock walls, over which three rivers plunge into the depths in almost 250 m high waterfalls on the northern edge. From the north the plateau is divided by a deep valley bordered by steep slopes, through which flows the Dapoi, which rises in the area of the Selidang. This valley may be a former crater lake . From the Selidang the Dapoi flows westwards, makes a bend to the north and flows between the Kenawang and the Mabun, which rise to the left and right of the valley. To the north of it, the Dapoi flows through a deep gorge in the steep face of the plateau to the north, where it flows into the Tinjar , a tributary of the Baram . In the approximately 1200 m high mountain ranges on both sides of the Dapoi Valley, several rivers arise that flow north and east over the edge of the plateau - including the Julan, which pours down into the valley in two waterfalls. The sub-plateau west of the Dapoi valley is only a third as large as the eastern plateau.
South of the plateau is the Plieran valley , which rises in the mountains on the Indonesian border. It flows southwest of the Usun Apau into the Murum , a tributary of the Rajang. The Plieran is fed by several rivers that arise on the Usun Apau. One of them is the luar.
literature
- Guy Arnold: The Usun Apau Plateau , The Geographical Journal , Vol. 23, No. 2, June 1957, pp. 167-176
Individual evidence
Web links
- Usun Apau Waterfalls , accessed October 6, 2010
Coordinates: 2 ° 54 ' N , 114 ° 36' E