PL EN
Discharge Coefficient of Rectangular Broad-Crested Weirs in Narrow Channels with High Relative Length of the Threshold
Volodymyr Zhuk 1  
,   Lesya Vovk 1  
,   Ihor Yuriiovych Popadiuk 1  
,   Ivan Matlay 1  
 
Więcej
Ukryj
1
Institute of Civil Engineering and Building Systems, Lviv Polytechnic National University, 12, S. Bandera Str., Lviv, 79013, Ukraine
AUTOR DO KORESPONDENCJI
Lesya Vovk   

Institute of Civil Engineering and Building Systems, Lviv Polytechnic National University, 12, S. Bandera Str., Lviv, 79013, Ukraine
Data publikacji: 01-11-2021
 
Ecol. Eng. Environ. Technol. 2021; 6:11–16
 
SŁOWA KLUCZOWE
DZIEDZINY
STRESZCZENIE
Broad-crested weirs (BCW) are commonly used elements of stormwater systems and of different open-channel hydraulic structures. Specific features of stormwater drainage channels are small width, low flow depths and, accordingly, small overflow heads at weirs. Dependences of the discharge coefficient of narrow (b = 0.224 m) rectangular sharp-edged broad-crested weirs with vertical walls, threshold height of 0.05 m and threshold length of 0.05 – 0.2 m are obtained experimentally. Experimental values of the discharge coefficient are approximated by the power-law functions of relative length of the weir. At large values of the relative length of the threshold (L/h> 10) for all weirs obtained the same tendency of decreasing the discharge coefficient with increasing L/h ratio that can be explained by the enlargement of the hydraulic friction along the weir with increasing L/h ratio.