Rub bua festival is a local traditional of Bangphli district the place close to Suvarnabhumi Air port.
Every year people in bangphli will respect the buddha idol by the lotus, the budha idol will be on the boat and people will be on the both of bank wait for the boat then when the boat come all people will respect by throw the lotus to the boat.
were searching after photos from the new airport in Bangkok, and found your deviation. Lovely, really great colors and figures. Just wanted to tell you!