Author(s): Linda Prasetyorini, Dwi Priyantoro, Nadjadji Anwar
Linked Author(s): Linda Prasetyorini
Keywords: Physical hydraulic model test, stilling basin, cascade
Abstract:
The PosoI Hydropower Station is located on the Poso River, at the downstream section of the Poso Lake in Central Sulawesi Province. The weir site is about 14 km away from Poso Lake outlet. At the weir site, the catchment area is 1906.30 km2 , and the structures are designed for a 50 year return period and flood discharge of 1456,50 m3 /s. According to the hydraulic calculation results, stilling basin of 45,0m length is arranged in the downstream of the weir bay. The aim of the model test is to evaluate and achieve the perfect, safe and optimum hydraulic design of the Hydropower Station. The model is using an undistorted model with scales of 1 to 60. Based on the research results, it can be concluded that the hydraulic performance of the original design is good and high speed in the escape gate is more than 15 m/s. In order to improve the hydraulic design, it is recommended to modify the stilling basin and make cascade on the downstream to reduce pulsating flow that happens by considering 25% sloping river on downstream. (2645, 68, 272)
Year: 2017