Discharge Coefficients Spillways Labyrinth Aoccording Transitional Hydrodinamic Upstream Walls Forms at The Aproach Canal

Today hydrology´s change affects the performance of original water structures; as a consequence their designs results insufficient. The implementation of labyrinth weirs 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, because some developing project can bear this situation in a future. The first important characteristic in labyrinth weirs is the position of weirs segments in alternative position, looking in plant like teeth. It increases effective length of discharge for the same channel width. However, many aspects of the functioning of these structures have not been investigated; inclusive in simple cases is still advisable to carry out the study of the hydraulic operation reduced physical models. The labyrinth weirs can present some problems because the hydrodynamic adaptation to the water flows from the canal upstream in specific by the canal walls. 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 like transition form of the canal walls. The purpose of this research is to implement a hydraulic device 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. Its necessary test various designs and optimizing the configuration. The values obtained from measurements of hydraulic head and flow transited, processed to obtain the coefficients of discharge. This coefficient is a dimensionless value related, characteristics of the weir and the flow rate.