PERENCANAAN SISTEM DRAINASE SMKN 1 KRAGILAN KABUPATEN SERANG

This research was conducted in a school area that has a conventional drainage system that is prone to flooding. To deal with flooding in the area, a new drainage system will be planned. The purpose of this study was to plan the main drainage system at SMKN 1 Kragilan, Serang Regency. The data or information used is primary data obtained from SMKN 1 Kragilan. The data processing method uses manual calculations according to the rational method for calculating rain discharge, and Manning's formula for channel discharge. After the calculation, the dimensions of the economic channel are obtained, because the channel can pass the maximum discharge for a certain wet, rough, and slope cross-sectional area. The main drainage channel is with a base width B = 0.77 m, water level h = 1 m and a height guard w = 0.50 m. The cross section of the channel is rectangular.