DRAINAGE SYSTEM DESIGN PT. SUPREME ENERGY RANTAU DEDAP MUARA ENIM, KABUPATEN LAHAT, SUMATERA SELATAN

• Main Author: Helmi Sidik, Mochammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/43142
• Institution: Institut Teknologi Bandung

PT. Supreme Energy Rantau Dedap (PT. SERD is a Geothermal Power Plant which includes several areas. The reviewed drainage system areas are Power Station Area and Hillside area. These areas have severe rainfall station but only Pagar Alam Station has adequate time series data, but it is necessary to calibrate the Pagar Alam Station using satellite rainfall data. Rainfall data in these study areas criteria is based on 10 years rainfall return period which is 139.1 mm. The rainfall criteria above is used to design drainage channel dimension. In order to calculate the drainage channel dimension, I use rational method and manning method. The channel used in this drainage system is U-Ditch shape and reinforcement concrete. In the Power Station area, water which flow from drainage system collected to a pond for 3 hours before flowing into outflow channel. In the hillside area the drainage system has several reservoirs. The maximum discharge resulted from this study is 1.1 m3/s and the drainage channel dimension is varied from 30 cm x 30 cm to 100 cm x 100 cm. The pond has 22 m x 51.7 m x 5 m dimension area. The hillside area drainage system has 1:3 slope and the total amount of reservoirs in this area is 9 reservoirs with the dimension of each reservoir 100 cm x 80 cm x 80 cm.