Ferry over the Chi River
|- elevation||30 m (98 ft)|
|- location||Mun river, Sisaket Province|
|- elevation||110 m (361 ft)|
|Length||1,047 km (651 mi)|
|Basin||49,480 km2 (19,104 sq mi)|
|- average||290 m3/s (10,241 cu ft/s)|
|- max||3,960 m3/s (139,846 cu ft/s)|
The Chi River (Thai: แม่น้ำชี, RTGS: Maenam Chi, IPA: [mɛ̂ːnáːm tɕʰīː]) is the longest river in Thailand; it extends 765 km, but carries less water than the second longest river, the Mun. In the Isan language of this region, as well as in the adjacent Lao language, the name of the river is pronounced and in the romanization of Lao transliterated as "Mae Si" ([sīː]) while the transliteration Chi reflects Bangkok-Thai. In wet seasons there are concerns about flash floods in the floodplain of the Chi River basin.
The river rises in the Phetchabun mountains, then runs east through the central Isan provinces of Chaiyaphum, Khon Kaen and Maha Sarakham, then turns south in Roi Et, runs through Yasothon and joins the Mun in Kanthararom district of Sisaket Province. The river carries approximately 9.3 cubic kilometres of water per annum.
The river was an 18th-century migration route for the re-peopling of the Khorat Plateau, by ethnic Lao people from the left (east) bank of the Mekong resettling on the right bank. This began in 1718 when the first king of the left-bank Kingdom of Champasak, King Nokasad, sent a group of some 3,000 "subjects" led by an official in his service to found the first settlement in the Chi river valley — and indeed anywhere in the interior of the Khorat Plateau — Muang Suwannaphum in present-day Roi Et Province (a history recorded and remembered, largely in terms of the struggle to expand wet-rice cultivation in the river valley.) Their descendents are now regarded as a separate ethnos from the Lao to the North and the central Thai to the South-West.
- Water level in Chi River still high
- Delineation of flood hazards and risk mapping in the Chi River Basin
- Brow, James (1976), "Population, land and structural change in Sri Lanka and Thailand", Contributions to Asian studies (Kogan Page) (Issue 9): 47, ISBN 90-04-04529-5
- C. Pawattana; N. K. Tripathi and S. Weesakul (2007). "Floodwater retention planning using GIS and hydrodynamic model: a case study for the Chi River Basin, Thailand". Environmental Informatics Archives (ISEIS – International Society for Environmental Information Sciences) 5: 548–556. EIA07-056. Retrieved March 5, 2012.
- Choopug Suttisa (2011). "Civil Society in the Chi River, Northeast Thailand" (Ph.D.). Massey University, New Zealand. pp. 1–17. Retrieved March 5, 2012. "Abstract: This paper aims to examine the concept of civil society in the rural communities in the Chi River, Northeast Thailand. It focuses on the questions of what civil society means in the Thai rural context, what factors make civil society proactive and how civil society is activated. By using participatory action research (PAR) as the main methodology to answer the inquiries. The paper addresses the new term of ‘grounded civil society’ which was created through the research process in two case studies. The research determines that two elements activated grounded civil society are from outside and inside factors. The outside factors included the negative effect of government development projects and the intervention of the participatory action research, which stimulate local people to engage in civil society. The inside factors are the poor economic conditions of the villagers and the social capital existing in the communities. The paper concludes with an analysis of the causal links between social capital and civil society which claims that social capital facilitated the creation of civil society."
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