Serayu River or Serayu River (formerly also called Ci Sarayu) is one of the rivers in Central Java. It stretches from northeast to southwest as far as 181 km, it passes five districts of Wonosobo, Banjarnegara, Purbalingga, Banyumas, and empties into the Indian Ocean in Cilacap regency.
The river is located on the slopes of Mount Prahu in Dieng, Wonosobo. Its spring is known as Tuk Bima Lukar (the spring of Bima Lukar). Having many tributaries, the total Serayu river basin is 4,375 km². Flows more or less west-southwest, on the south side of this stream is limited by a row of hills called the Serayu Selatan Mountains.
In addition to Kali Serayu, which originates in G. Prahu and G. Sindoro, some of its tributaries include Kali Begaluh from the slopes of G. Sumbing; Times of G. Prahu; Kali Merawu from G. Prahu; Kali Klawing whose tributaries mostly fled in G. Slamet, G. Walirang and G. Jaran; Kali Pekacangan (Anak Kali Klawing) from G. Rogojembangan; Cow Kali which is upstream in Serayu Selatan Mountains; Kali Banjaran, Logawa River, Kali Tenggulun, Kali Kawung, and Kali Tajum, all of which originated in G. Slamet.
Utilization
Kali Serayu has considerable water discharge. In the upstream part of Banjarnegara, this river has a debit of 656 m³ / sec. With the increase of water entering from its tributaries, downstream of this discharge increased to 2,866 m³ / s and 2,797 m³ / s, respectively in Banyumas and Rawalo.
The dam of the Great Commander of Sudirman was built in this Serayu River. 10 km west of Banjarnegara city. The dam, also known as Mrica or Mrican Reservoir, has a puddle of lk. 12 km², if fully charged. Besides being used for irrigation and tourism, the Mrica Reservoir is mainly built to supply the 184.5 MW PLTA.
Rafting adventure tour has been developed in the upstream part of Kali Serayu. Tourists usually start this activity from Tunggara Village and Prigi Village in Banjarnegara.
Threat of sustainability
The sustainability of the waters of Serayu River is especially threatened by sedimentation, and later also by water pollution. Sedimentation or puddling in the river is caused by soil erosion, especially in the Dieng plateau region. The 2005 note states that along the Serayu flow areas there are still 187 industries that do not have standard wastewater treatment plants, including 92 hospitals, 124 hotels and dozens of other businesses. But quite a lot of local industries and companies in Wonosobo, Banjarnegara, Purbalingga, Banyumas, and Purwokerto are environmentally conscious and follow clean program (Prokasih) to save Kali Serayu.
Serayu Valley Railway Company or Serajoedal Stoomtram Maatschappij is a railway company that once operated during the Dutch East Indies government in 1891 along the Serayu River basin. This railway route links Maos - Purwokerto - Sokaraja - Purbalingga - Banjarnegara - Wonosobo cities. This train line is now disabled.
Serayu Train is a leading economy class train that serves the Purwokerto - Kiaracondong - Pasar Senen journey, run twice a day (morning and night). Serayu train is also known as Cipuja / Citrajaya. Currently this railway is the only train that operates from Jakarta to Central Java route through Bandung and does not cross Cirebon.
These train stations include Kroya, Maos, Kawunganten, Gandrungmangun, Sidareja, Cipari, Langen, Banjar, Ciamis, Tasikmalaya, Cipeundeuy, Warungbandrek, Cibatu, Kiaracondong, Padalarang, Purwakarta, Jatinegara and Pasarsenen.
Beginning April 1, 2015, Serayu Train will not stop at Jakarta Kota station and stop direction to Pasar Senen station.
Serayu train was inaugurated in 1985. Initially the train was named Quick Sidareja. The name of KA then changed to KA Cipuja, while the night trip was named Citrajaya (Cilacap-Jakarta Raya) and the route was extended to Cilacap and Jakarta. In the decade of 2000s it became a Serayu train to this day. Meanwhile, Galuh trains serve the Tanahabang-Banjar route and are specifically reserved for passengers not transported by Cipuja or Citrajaya trains.
In 2013, the journey of KA Serayu is extended to Purwokerto Station.
At present, PT Kereta Api Indonesia operates KA Serayu, an AC Economy class train connecting Purwokerto - Kroya - Maos - Tasikmalaya - Bandung - Purwakarta route, to Jakarta Kota.
Serayu River is also used as a theme in the song keroncong On the edge of the River Serayu.
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