MODELING OF USBR TYPE II ENERGY REDUCER TO IMPROVE ENERGY REDUCTION IN STILLING BASINS WITH HYDRAULIC PHYSICAL MODEL TEST

Abstract

The main building in an irrigation network building can be defined as a building complex along the river where buildings can divert water to an irrigation channel so that the water can be used for irrigation purposes. If a weir is built, a water jump will occur downstream of the weir. The speed in the area is still high so that a construction of energy absorbers is made. Energy reducer is a hydraulic building which built to reduce energy of water that caused from the runoff of the top of the dam lighthouse. The construction of energy absorbers has several types including the type of Vlughter, Schoklitsch, Bucket, USBR, and The SAF Stilling Basin. In this study, the type of USBR II energy reducer is used, which is an energy reducer which has sharp channel blocks (dispersing teeth) at the upstream end and near the end of the downstream (end sill) and this type is suitable for flow with hydrostatic pressure greater than 60 m. The purpose of this study is to efficiently the model of energy absorbers by modifying the reduction the elevation in the energy absorbing floor type USBR II. This research was conducted at the Laboratory of River and Swamp, Water Resources Engineering, Faculty of Engineering, University of Brawijaya Indonesia by testing the physical model in accordance with the design work of South Borneo Kambat Dam, with a physical model of open channels with a width of 40 cm, fixed base, scalatic and using clean water.