water flowing over floodgates of a dam at khun dan prakan chon, nakhon nayok province, thailand

architecture asia background building chon concrete construction control dam dan electric electricity energy engineering environment environmental flood floodgate floodgates flow flowing gate green hydro hydroelectric industrial industry khun lake landmark landscape metal nakhon nature nayok old open outdoor plant pollution power prakan province reservoir river sky sluice spillway station structure system technology thailand view wall water waterfall waterway