The result
is maximum rainfall in Rayong, from historical data. 13 years ago (2003 to 2015) with the highest value at 148.7 mm. In 2014, which was used in the design, change the size of the U-ditch at area WW, which is area received rain water = 352 M2. or convert to volume
(Q Rain) is 0.0138 m3 / s (49.68 m3 / hr.)
And the results of the calculation changes the size of the U-ditch, which can receive the maximum water volume is
(Qc Design) 0.0162 m3/s (58.32 m3/hr.)
Which can support the draining water enough.
Qc (Design) > Q maximum rain