Chianan, Chia-nan, or Jianan may refer to:

  • Chiayi–Tainan Plain, also known as the Chianan or Jianan Plain (嘉南平原, Jiānán Píngyuán), a large plain on Taiwan Island
  • Chianan Irrigation (嘉南大圳, Jianán Dàzùn), also known as the Kanan Irrigation, used by farms in the Taiwanese plain

See also

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