Parameters

The hydraulic operation and performance of a culvert involve a number of factors. You must determine, estimate, or calculate each factor as part of the hydraulic design or analysis.
The following procedures assume steady flow but can involve extensive calculations that lend themselves to computer application. The procedures supersede simplified hand methods of other manuals. TxDOT recommends computer models for all final design applications, although hand methods and nomographs may be used for initial planning.