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Solo River

Coordinates: 6°47′S 112°33′E / 6.783°S 112.550°E / -6.783; 112.550
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Bengawan Solo
ꦧꦼꦔꦮꦤ꧀ꦱꦭ
Bengawan Solo passing through Bojonegoro
Location
Country Indonesia
ProvincesCentral Java, East Java
Cities/TownsSurakarta, Ngawi, Bojonegoro
Physical characteristics
SourceSouthern Mountains of East Java (Sewu Mountains)
 • locationSpecial Region of Yogyakarta, Central Java and East Java
2nd sourceMount Merapi and Mount Merbabu
 • locationBoyolali Regency
3rd sourceMount Lawu
 • locationKaranganyar Regency
4th sourceWestern region of Mount Wilis
 • locationPonorogo Regency
MouthJava Sea
 • location
Gresik Regency & Sedayulawas (Lamongan Regency)
 • coordinates
6°52′38″S 112°33′22″E / 6.877111°S 112.556167°E / -6.877111; 112.556167
Length600 km (370 mi)[1]
Basin size16,100 km2 (6,200 sq mi)[1]
Discharge 
 • average684 m3/s (24,155 cu ft/s)
Basin features
River systemBengawan Solo basin (DAS230217)[2]
LandmarksFort van den Bosch; Solo Safari Zoo; Kusuma Bhakti Heroes' Memorial Park; University of Surakarta
WaterbodiesGajah Mungkur Dam
BridgesSembayat Bridge; Karanggeneng Bridge; Laren Bridge; Tuban-Babat National Road Bridge; Oude Indië Spoorbrug bij Kléwér; Kanor - Rengel Bridge; Kaliketek Bridge; Lengkung Bojonegoro Bridge; Padangan Bridge; Solo-Cepu railroad Bridge;
Basin management & authorityBPDAS Solo;[2] BBWS Bengawan Solo[3]

The Solo River (known in Indonesian as Bengawan Solo, with Bengawan being an Old Javanese word for river, and Solo derived from the old name for Surakarta[4]) is the longest river in the Indonesian island of Java, it is approximately 600 km (370 mi) in length.

Apart from its importance as a watercourse to the inhabitants and farmlands of the eastern and northern parts of the island, it is a renowned region in paleoanthropology circles. Many discoveries of early hominid remains (dating from 100,00 to 1.5 million years ago) have been made at several sites in its valleys, especially at Sangiran, including that of the first early human fossil found outside of Europe, the so-called "Java Man" skull.[5]

Bengawan Solo was the crash site of Garuda Indonesia Flight 421.[6]

Geography

It passes through the major city of Surakarta (called Solo by the local inhabitants). An important early tributary to the Solo River is the Dengkeng River, which has its source on Mount Merapi.[7] After passing through Solo, the river flows northward around Mount LawuRegency and then turns eastward into East Java in the Ngawi Regency and Ngawi (town)

After Ngawi the river turns northward again, forming the boundary between Blora Regency of Central Java and Bojonegoro regency of East Java. From the town of Cepu in Blora, the river turns eastward and passes through Bojonegoro Regency's capital city. From there, it continues eastward through the Lamongan and Gresik Regencies. The last part of the river's basin (roughly starting from Bojonegoro regency) is mostly flat land.[8]

Bengawan Solo's delta is located near the town of Sidayu in the Gresik Regency. The present delta is redirected by a human-made canal.[8] The original delta flowed into the Madura Strait,[8] but in 1890 a 12-km canal was made by the Dutch East Indies authority to redirect the Solo River into the Java Sea.[8][9] This was done to prevent sedimentation of mud from filling the Madura Strait and thereby preventing sea access to the important port city of Surabaya.[8]

The Solo River Delta has a huge mud sedimentation flow that deposits 17 million tonnes of mud per year. This sedimentation in the delta forms a cape, which has an average longitudinal growth of 70 m per year.[9] This delta is known as Ujung Pangkah (Pangkah Cape).

History

Vessels on the Solo River during the colonial period

Solo River was part of a massive river system that once existed in Sundaland. This drainage of the river system consisted of a major river in present-day Sumatra and Borneo, such as the Asahan River, Musi River and Kapuas River. The river system disappeared when Sundaland was submerged after sea level rise following the last Ice Age.[10]

The river played an important part in Javanese history. Its drainage basin is an important agricultural area, dominated by rice farming. The river transported fertile volcanic soil downstream, replenishing the soil. It also provided a link between Javanese port cities on the northern coast and the rice-growing hinterlands, with shallow vessels transporting rice to the ports to be sold.[11] This rice is Java's main commodity that was traded as part of the Spice trade.

Following the acquisition of much of Java by the Dutch colonial government, various cash crops were introduced to be planted across the river basin, such as coffee, sugar, and cotton. (see Cultivation System).

By the last years of the 19th century, river sedimentation in its original delta in Madura Strait started to disrupt vessel traffic in the port of Surabaya. The Dutch colonial government decided to divert the river flow away from the shipping lane into the Java Sea. They built a canal in the river's delta in the 1890s which still alters the river to this day.[12]

In 1891, Dutch paleoanthropologist Eugène Dubois discovered remains (a part of a skull and human-like femur bone and tooth) he described as "a species in between humans and apes".[5] He called his finds Pithecanthropus erectus ("ape-human that stands upright") or Java Man. Today, they are classified as Homo erectus ("human that stands upright").[13][5] These were the first specimens of early hominid remains to be found outside of Africa or Europe.

Resource management

The map depicts the Bengawan Solo River Region, which consists of 96 river basins, including the Bengawan Solo basin (number 034).
The map depicts the Bengawan Solo River Region, which consists of 96 river basins, including the Bengawan Solo basin (number 034).

Brantas River Public Corporation or Perum Jasa Tirta I (PJT1) is responsible for managing the water resources of the Brantas and Bengawan Solo river basins in Indonesia.[14] It is a centralised effort to:

  • conserve the water resource quality and quantity in the Bengawan Solo and Brantas River basins
  • flood control
  • manage hydroelectric and other infrastructures along those rivers.

Before the centralised management efforts, there were reports of pollution along the Bengawan Solo.[15]

In culture

"Bengawan Solo", a song composed by Gesang Martohartono in 1940, poetically describes the river and has become famous across Asia.

See also

References

  1. ^ a b Land resources information systems in Asia: proceedings of a regional workshop held in Quezon City, the Philippines, 25–27 January 2000. Food and Agriculture Organization. 2000. p. 58. ISBN 9789251045169.
  2. ^ a b https://hukumonline.com/pusatdata/detail/lt4f2f760d2fff3/keputusan-menteri-kehutanan-nomor-sk511menhutv2011-tahun-2011
  3. ^ https://jdih.pu.go.id/internal/assets/assets/produk/PermenPUPR/2020/06/PermenPUPR16_Tahun_2020.pdf
  4. ^ Noorduyn, J. (1968). "Further Topographical Notes on the Ferry Charter of 1358: With Appendices on Djipang and Bodjanegara". Bijdragen tot de Taal-, Land- en Volkenkunde. 124 (4): 470. JSTOR 27860979.
  5. ^ a b c Evolution The Human Story, Evolution The Human Story (2011). Evolution The Human Story. Dorling Kindersley. ISBN 978-1405361651.
  6. ^ Walling, Michael G. (2010). In the Event of a Water Landing. Cutter Publishing. p. 72. ISBN 9780982855300.
  7. ^ Santoso, Suwito; Kestity Pringgoharjono (2006). The Centhini story: the Javanese journey of life : based on the original Serat Centhini. Marshall Cavendish. p. 148. ISBN 9789812329752.
  8. ^ a b c d e Whitten, Tony; Roehayat Emon Soeriaatmadja; Suraya A. Afiff (1996). The ecology of Java and Bali. Oxford University Press. p. 129. ISBN 9789625930725.
  9. ^ a b Journal of Southeast Asian earth sciences, Volumes 2-3. the University of California: Pergamon. 1989.
  10. ^ Simanjuntak, Truman (2006). Archaeology: Indonesian perspective : R.P. Soejono's festschrift. Yayasan Obor Indonesia. p. 72. ISBN 9789792624991.
  11. ^ Wink, André (2004). Indo-Islamic society, 14th-15th centuries. Brill. p. 54. ISBN 9789004135611.
  12. ^ Dick, Howard W. (2003). Surabaya, city of work: a socioeconomic history, 1900-2000. NUS Press. p. 418. ISBN 9789971692643.
  13. ^ "Eugene Dubois". Retrieved on 2008-06-02 from "Eugene Dubois". Archived from the original on 2008-05-15. Retrieved 2008-06-02..
  14. ^ "Brantas River Public Corporation". Archived from the original on 2008-12-01. Retrieved 2009-11-14.
  15. ^ J. E. Sahetapy. Invisible victims of Indonesia : a concise report on environmental Pollution. Universitas Airlangga Surabaya Indonesia. p. 2.

Further reading

Wikimedia Commons has media related to
Bengawan Solo
(Solo River).
  • Prabowo, Dibyo, & McConnell, D. J. & Food and Agriculture Organization of the United Nations. (1993), Changes and development in Solo Valley farming systems, Indonesia Food and Agriculture Organization of the United Nations, Rome ISBN 92-5-102897-4
  • Turner, Peter (1997). Java (1st ed.). Melbourne: Lonely Planet. p. 286. ISBN 0-86442-314-4.

6°47′S 112°33′E / 6.783°S 112.550°E / -6.783; 112.550

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