Analisis Koefisien Debit Pada Variasi Alat Ukut Debit di Laboratorium Hidraulika Jurusan Teknik Sipil Universitas Islam Indonesia

Abstract

In terms of flow mechanics, there are two types of flow, namely closed channel flow and open channel flow. In the flume, which is one of the open channel models in the laboratory, weir can be installed on the channel that works to increase the water level and measure the flow rate. To avoid various problems and obstacles such as work and relatively more expensive costs in field observations, a discharge measuring instrument model was made in the laboratory. The experiment was conducted using 3 (three) models of the weir, namely rectangular weir, V-Notch weir, and cipoletti weir. The value of the discharge coefficient (Cd) carried out in the laboratory using the volumetric method and current meter where the results from the laboratory will be compared with the discharge coefficient (Cd) in SNI 8137:2015. In the research, the average discharge coefficient (Cd) for the volumetric method on the rectangular weir is 0.746, V-Notch weir is 0.314, and cipoletti weir is 0,101. The average discharge coefficient (Cd) for the current meter on rectangular weir is 0,772, V-Notch weir is 0.307, and cipoletti weir is 0.078. Meanwhile, the average discharge coefficient (Cd) for SNI 8137:2015 method on the rectangular weir is 0.621 and V-Notch weir is 0.581.