Water levels and drainage in Bangkok should be managed according to local conditions. I suggest two plans for such management: The first is to be adopted in the monsoon to prevent flooding, while the second plan is designed to deal with water pollution in the dry season by flushing it out from the canals. Both plans should be based on the force of gravity to reduce expenses spent on the control of water levels in the canals.”
His MajestKingBhumibolAdulyadej
Termed by His Majesty the King, Good Water Chases Bad simply means using fresh and clean water to flush out and dilute polluted water.Water from the Chao Phraya River and elsewhere flows into Bangkok through the Bang Khen, Bang Sue, Saensaep, Thewet, Bang Lamphu or any other canals, and flows through connecting canals back out to the River further downstream. With appropriate planning of water flows to and from the city, polluted water in Bangkok is diluted and most pollutants are flushed out. This efficiently alleviates pollution in canals during the dry season.