Head-discharge relationships for rectangular flat-crested slit weir / Rosley Jaafar

Jaafar, Rosley (2015) Head-discharge relationships for rectangular flat-crested slit weir / Rosley Jaafar. Jurnal Intelek, 10 (1). pp. 49-54. ISSN 2682-9223


The rectangular weir is the most commonly used device in channel and laboratory for flow measurement due to its simplicity. The rectangular sharp-crested slit weir has been shown to be good at measuring small (< 0.005 m3/s) flow rates. In this study, the rectangular slit weir concept is extended to find the head-discharge relationship of water flows over a contracted rectangular flat-crested slit weir under free flow conditions. The head-discharge relationship is determined experimentally using a nine different weir heights with 10 mm weir width and 4 mm weir crest thickness at small discharges (< 0.00067 m3/s). The experimental data of actual and predicted discharge is verified by using a statistical analysis. A linear regression equation correlating the head-discharge relationship provides an accurate prediction of free flow discharge over the weir to yield results within 2.1% error of actual discharges and have a strong relationship. The presented head-discharge equation can use to estimate the discharge flow of water over rectangular flat-crested slit weir with an appropriate limitation.


Item Type: Article
Email / ID Num.
Jaafar, Rosley
Subjects: T Technology > TA Engineering. Civil engineering > Structural engineering
T Technology > TC Hydraulic engineering. Ocean engineering > Dams. Barrages
Divisions: Universiti Teknologi MARA, Perlis > Arau Campus
Journal or Publication Title: Jurnal Intelek
UiTM Journal Collections: UiTM Journal > Jurnal Intelek (JI)
ISSN: 2682-9223
Volume: 10
Number: 1
Page Range: pp. 49-54
Keywords: discharge equation; water discharge; discharge coefficient; slit weir
Date: June 2015
URI: https://ir.uitm.edu.my/id/eprint/36789
Edit Item
Edit Item


[thumbnail of 36789.pdf] Text

Download (199kB)

ID Number




Statistic details