Brantas River

The Brantas is the longest river in East Java, Indonesia.^[2] It has a length of 320 km,^[3] and drains an area of over 11,000 km² from the southern slope of Mount Kawi-Kelud-Butak, Mount Wilis, and the northern slopes of Mount Liman-Limas, Mount Welirang, and Mount Anjasmoro.^[4] Its course is semi-circular or spiral in shape: at its source, the river heads southeast, but gradually curves south, then southwest, west, then north, and finally it flows generally eastward at the point where it branches off to become the Kalimas and Porong River.

Brantas River Kali Brantas, Sungai Brantas
Brantas river, Kediri regency.
Location of river mouth Show map of Java Brantas River (Indonesia) Show map of Indonesia
Location
Country	Indonesia
Province	East Java
Physical characteristics
Source	Arjuno-Welirang
Mouth
• location	Madura Strait
Length	320 km (200 mi)
Basin size	11,900 km2 (4,600 sq mi)[1]
Discharge
• location	Near mouth
• average	579 m3/s (20,400 cu ft/s)
Basin features
River system	Brantas Basin (DAS220228)[1]

Lithography of Brantas river based on the painting by Abraham Salm (1865-1872)

Brantas river before 1940

History

Brantas River in the area of Surabaya, early 20th century

Shallow Brantas river near Kediri.

King Mpu Sindok moved his kingdom from the Mataram Kingdom in Central Java to a new location on this river circa 950 A.D. Possibly (only one of several reasons given) due to a Mount Merapi volcanic eruption, he had to leave his kingdom to this new safe place near the present city of Madiun.

Cities and regencies on the Brantas River

• Batu
• Malang Regency
• Malang
• Blitar Regency
• Blitar
• Tulungagung Regency
• Kediri Regency
• Kediri
• Nganjuk Regency
• Jombang Regency
• Mojokerto Regency
• Mojokerto

Geography

The river flows in the eastern area of Java with a predominantly tropical monsoon climate (designated as Am in the Köppen-Geiger climate classification).^[5] The annual average temperature in the area is 26 °C. The warmest month is October when the average temperature is around 30 °C, and the coldest is June, at 24 °C on average.^[6] The average annual rainfall is 2982 mm. The wettest month is March, with an average of 496 mm of rainfall, and the driest is August, with 28 mm of rainfall.^[7]

Brantas River
Climate chart (explanation)
J F M A M J J A S O N D     459     28 21     453     27 22     496     27 21     282     28 22     144     29 22     175     27 20     65     29 20     28     32 20     35     35 21     111     37 22     295     35 23     439     30 21 █ Average max. and min. temperatures in °C █ Precipitation totals in mm Source: [6]
Imperial conversion J F M A M J J A S O N D     18     82 70     18     81 72     20     81 70     11     82 72     5.7     84 72     6.9     81 68     2.6     84 68     1.1     90 68     1.4     95 70     4.4     99 72     12     95 73     17     86 70 █ Average max. and min. temperatures in °F █ Precipitation totals in inches

See also

• List of rivers of Indonesia
• List of rivers of Java
• List of drainage basins of Indonesia