Page - 535 - in Book of Full Papers - Symposium Hydro Engineering

plant located on the Zehlum River through a headrace tunnel. The specifications of the plant are as follows. Table 1. Specifications of the Patrind Hydropower Project Weir Intake Energy Generation Catchment Area Type Height Length Design Discharge Turbine Type Installed Capacity Annual Generation Energy 2,400㎢ CGD 43.5m 167.6m 153.7㎥/s Vertical Francis 150MW 641.3GWh Fig 1. Bird’s-eye View of Patrind Hydropower Project 2.2. SEDIMENT INFLOW STATUS The project site is directly affected by sedimentation erosion from the Himalayas. In order to check the amount of sediments flowing into weir, we analyzed the discharge and suspended sediment observation data of the Garhi Habibullah station, which is managed by WAPDA(Water and Power Development Authority, Pakistan) and located about 12.3kms upstream of the project site, from 1960 to 2002. The sediment rating curve was made as follows through regression analysis using the observed discharge and suspended sediment amount. 𝑄 𝑆 𝑆 = 0.043 𝑄 2.86 𝑄 𝑆 𝑆 : Suspended sediment load(ton/day), 𝑄 : Water flow(𝑚 3/𝑠 ) In addition, the results of sieve analysis by discharge conducted by WAPDA allowed for the prediction of the suspended sediment composition flowing into weir. 535