ABSTRACT
This chapter summarizes the concepts and procedures used in hydraulic flood routing. It employs overland flows to illustrate the derivations of both analytical and numerical solutions. A hydraulic routing method applies either the explicit or the implicit numerical method to solve the finite difference equations that govern the flow motion. The monoclinal flood wave is the simplest wave form that can be produced by a sudden lift of a sluice gate. A sudden increase in the discharge creates a monoclinal wave on the base flow. The characteristic wave method is an algorithm derived to provide numerical dynamic wave (DW) solutions. To simplify the mathematical details, a rectangular cross section is employed as an example to explain how the characteristic wave method is derived. There are two major concerns in a numerical study: numerical stability and numerical diffusion. Both are directly related to the wave movement.
