Si Mueang Mai District
|Si Mueang Mai
Amphoe location in Ubon Ratchathani Province
|• Total||1,310.0 km2 (505.8 sq mi)|
|• Density||50.0/km2 (129/sq mi)|
|Time zone||THA (UTC+7)|
Historically, the area was Khwaeng Mueang Khong Chiam. The head of the khwaeng was Upahad (อุปฮาด), who reported to the governor of Ubon Ratchathani. In 1903 the office of Khong Chiam was moved from Ban Na Kho to Ban Na Pho Klang.
In 1912 the office of Khwaeng Mueang Khong Chiam Tai was moved to Ban Na Ueat, Tambon Na Kham. In 1914 was moved again to Ban Dan Pak Mun, Tambon Suwan Wari Noi, and subsequently was district was renamed to Suwan Warin. In 1939 it got back its historical name Khong Chiam. Finally the district office was moved to Rong Kham Ma Chok in 1957.
On September 14, 1971 the district Khong Chiam was renamed to Si Mueang Mai. At the same time the district Ban Dan, split off from Khong Chiam in 1959, received the name Khong Chiam, as it contained the central part of the historical Mueang.
Neighboring districts are (from the southeast clockwise) Khong Chiam, Phibun Mangsahan, Tan Sum, Trakan Phuet Phon and Pho Sai. To the east across the Mekong river are the Laotian provinces of Salavan.
The important water resource is the Mekong River.
The district is subdivided into 11 subdistricts (tambon), which are further subdivided into 118 villages (muban). Si Mueang Mai is the only township (thesaban tambon) of the district, covering parts of the tambon Na Kham. There are further 11 Tambon administrative organizations (TAO).
- พระราชกฤษฎีกาเปลี่ยนนามอำเภอ กิ่งอำเภอ และตำบลบางแห่ง พุทธศักราช ๒๔๘๒. Royal Gazette (in Thai) 56 (0 ก): 354–364. April 17, 1939.
- พระราชกฤษฎีกาเปลี่ยนชื่ออำเภอบางแห่งในจังหวัดอุบลราชธานี พ.ศ. ๒๕๑๔. Royal Gazette (in Thai) 88 (98 ก): 618–620. September 14, 1971.
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