Since this year's flood season is now in full swing and as of Friday, 17 (out of 77) provinces across the country had reports of flooding, many people are worrying that devastating floods will strike again, as happened five years ago.
However, the specialists, who took part in flood mitigation back in those days, stressed that water situations in 2011 and this year are different.
According to the Irrigation Department's records, rainfall in 2011 averaged 1.95 metres, compared to 1.24 metres this year up to September.
There was as much as 70 billion cubic metres of water in all reservoirs across the country was and this filled all of the major dams in the Chao Phraya River basin rapidly.
"We're talking about a whole different volume of water that we're facing this year, from back in 2011," Royon said.
Chaowalit Chantararat, managing director of the TEAM Group, said the water volume back in 2011 was too much to manage.
"At that time we faced a serious water management problem because all major dams were full and urgently needed to discharge water," he said.