The Bian River or Mbian River is a river of
western part of Papua, in the province of Papua,
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
. Its total length is 580.6 km and width around 70 – 1447.1 m. Some 900 people in its upper course are said to speak the language Bian Marind.
Geography
The river flows in the southern area of Papua with predominantly
tropical rainforest climate
A tropical rainforest climate, humid tropical climate or equatorial climate is a tropical climate sub-type usually found within 10 to 15 degrees latitude of the equator. There are some other areas at higher latitudes, such as the coast of southea ...
(designated as ''Af'' in the Köppen-Geiger climate classification).
The annual average temperature in the area is 23 °C. The warmest month is October, when the average temperature is around 25 °C, and the coldest is June, at 20 °C.
The average annual rainfall is 2952 mm. The wettest month is May, with an average of 405 mm rainfall, and the driest is August, with 62 mm rainfall.
Ecology
In the district of Muting (
Merauke Regency
Merauke Regency is a regency in the far south of the Indonesian province of South Papua. It covers an area of 46,791.63 km2, and had a population of 195,716 at the 2010 Census and 230,932 at the 2020 Census; the official estimate as at mid 2 ...
), the Bian River is a
nature reserve
A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, or features of geological or ...
by the order of the Ministry of Forestry as the habitat of various protected flora and fauna, among others:
Archerfish
The archerfish (spinner fish or archer fish) form a monotypic family, Toxotidae, of fish known for their habit of preying on land-based insects and other small animals by shooting them down with water droplets from their specialized mouths. The ...
and
Asian arowana
The Asian arowana (''Scleropages formosus'') comprises several phenotypic varieties of freshwater fish distributed geographically across Southeast Asia. While most consider the different varieties to belong to a single species, work by Pouyaud ...
.
See also
*
List of rivers of Indonesia
This is a list of rivers in Indonesia.''Map of Indonesia''. Peta Indonesia. Wawasan Nusantara. CV. Indo Prima Sarana. Accessed 29 Juli 2017.
By island
This list is arranged by island in alphabetical order, with respective tributaries indented un ...
*
List of rivers of Western New Guinea
This is a partial list of rivers of Western New Guinea in Indonesia.''Map of Indonesia''. Peta Indonesia. Wawasan Nusantara. CV. Indo Prima Sarana. Accessed 29 Juli 2017.
In alphabetical order
By mouth location
From west to east:
North coast ...
References
{{coord, 8.1193, S, 139.9411, E, source:wikidata, display=title
Rivers of Papua (province)
Rivers of Indonesia