Author(s): Asis Mazumdar, Prasun Dutta, Milan Nayek, Subhasish Das, Rajib Das
Linked Author(s): Rajib Das
Keywords: Flume, Parshall flume, free flow, submerged flow
Abstract: In the flow measuring structures with control section such as Parshall flumes, a relationship would be produced between water depth and discharge. The advantages of this structure include minimal head loss, low construction cost, adaptability to a variety of channel types, and ability to measure wide ranges of flows with custom-designed structures. In the present study, a series of detailed laboratory measurements are made under steady-state flow conditions through a Parshall flume of throat width 0. 127 m (5??) and length 1. 352 m. From the literature study very few, in fact no data are available for 5?? throat width for any flume length. Free flow and submerged flow calibration are done within the flow range of 0. 005 m3/s to 0. 027 m3/s. Henceforth, equations applicable for both free flow and submerged flow regime are proposed and hence producing Ditchrider's table for field implementation of the flume. The result of the calibration shows that under favorable operating conditions of the discharge within calibrated flow, the proposed equation can determine accurately the discharge with maximum deviation up to �5 % in both free flow and submerged flow regime
Year: 2017