RT - Journal Article
T1 - Investigation of the Hydraulic Characteristics of Flap Gates at the End of Trapezoidal Channels
JF - JSTNAR
YR - 2021
JO - JSTNAR
VO - 25
IS - 2
UR - http://jstnar.iut.ac.ir/article-1-4049-en.html
SP - 107
EP - 118
K1 - flap gates
K1 - trapezoidal channel
K1 - flow control
K1 - flow measurement
AB - In this study, the hydraulic characteristics of the flap gates are installed at the end of the trapezoidal channels were investigated by laboratory study. In the physical model, three trapezoidal channels and four gates with different weights were used (12 gates for three channels). Based on several experiments, equations for estimating of flow rate for each side slope (each channel) were developed using dimensional analysis. In this research, five forms of discharge-stage relationship were used to obtain relationships for each side slop to estimate flow rate, separately. The results show that none of the discharge-stage relationships forms as a single relationship for all flap gates in a certain channel are suitable for estimating discharge. But the first, second, and third forms of the discharge-stage relationship are very suitable for estimating the flow rate in a certain channel for a certain flap gate. In other words, for each gate with a specific weight, a separate (unique) relationship is obtained to estimate the flow rate in the form of the first to the third discharge-stage relationship in a certain channel. To estimate of flow rate by using the first form of the discharge-stage relationship, the maximum values of statistical parameters of RMSE, ME, and MARE, among all three channels, are 0.0001 m3/s, 0.00022 m3/s, and 0.22 percent, respectively. The values of all the above statistical parameters for the first, second, and third forms of the discharge-stage relationship are presented in the article.
LA eng
UL http://jstnar.iut.ac.ir/article-1-4049-en.html
M3 10.47176/jwss.25.2.42921
ER -