Author(s): Gustavo Delgado, Oscar Paz Paiz, Vesile Akansel

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Keywords: Spillway; Labyrinths; Hydrodynamics; Coefficients; Discharge;

Abstract: In the last times the canals, weirs and others hydro-structures designers starts to use labyrinth weirs in spillways. Today climate change affects the performance of original water structures; as a consequence their designs results insufficient. The implementation of labyrinth has been indicated as beneficial elements in water reservoir or water conducts because increase the discharge in high events. This characteristic is an advantage because can increase the body´s normal level of water to replace losses while maintaining the same level of “high water”. This structure can be use in a new design too. Some important characteristic in labyrinth weirs is the flow approach conditions over the spill weirs, and the flow condition However, many aspects of the functioning of these structures have not been investigated. The labyrinth weirs can present some problems because the upstream canal hydrodynamic adaptation to the water flow attends to construction requirements. In previous structures that use these elements, it has been found nape interference over the crest and disturbance flow zones along the weir. For this reasons it is necessary implement several characteristics like specific shapes and long apex. The purpose of this research is to implement a upstream hydrodynamic hydraulic wall to get down the nape interference effects and increase the discharge. For this reason we resorted to the study of this device as an equivalent to physical geometric scale of a labyrinth weir. The values obtained from measurements of hydraulic head and flow transited, processed to obtain the coefficients of discharge.

DOI: https://doi.org/10.3850/38WC092019-0620

Year: 2019