رابطه دبي اشل بدون بعد در دريچه هاي قوسي با جريان آزاد

Dimensionless Stage-Discharge Relationship for Free Flow Radial Gates

Defining the relationship between hydraulic parameters of structures helps us to manage the system properly. In this study by using a dimensional analysis method, a dimensionless equation was obtained for radial gates. In this equation water depth at up stream section, gate width, gate opening, and discharges are included. Discharge coefficient which is difficult to estimate is not included in the equation. Using a series of laboratory measured data, the best equations which could be fitted the data were obtained. Later by using three series of field measured data the equations were validated and tested. The ranges of discharge in laboratory and field measured data were 30 to 320 Isʹ and 0.11 to 240 m3sʹ, respectively. Results showed that the obtained equation could be fitted to laboratory and field measured data very well. It could also be used as a proper tool for management of radial gates in irrigation and drainage projects like Doroodzan project in Fars province, southern Iran.