Considerations about the drawing of the open channels [articol]

Abstract

Drawing the open channels flow of trapeze shape is not a just simple problem hence between the flow discharge and geometric parameters a nonlinear relationship there is. In the classic problems when the flow discharge and one of the geometrical parameters (like breadth and water depth) are given, the solution has one solution and that is even simple calculus to obtain it. An interesting problem appears when given data are represented by the flow discharge and velocity values and both breadth channel and water depth are requested. The problem has limitations and when the solution exists, it’s possible to obtain two values for the geometric parameters. The paper presents a new approach of the last problem in the drawing of the open channels flow of trapeze shape with pertinent comment