Abstract: In the computation of advection-diffusive contaminant transport, the Holly-Preissmann characteristics scheme for the advection operator is known to be quite accurate and stable. However, these qualities are obtained at the ...

Abstract: The Preissmann scheme, often referred to as the four-point scheme, is a bidiagonal implicit finite-difference method for solution of the de St. Venant equations. It is unconditionally stable and extremely robust, and thus ...

Abstract: DUFLOW is a microcomputer software package for simulating one‐dimensional unsteady flow in open‐channel systems. The program is designed for simple networks of channels with simple structures. Water levels and flow rates ...

Abstract: The term transcritical flow denotes the existence of both subcritical and supercritical flow regimes in an open-channel system. It is similar to transonic flow in gas dynamics. Transcritical flow is encountered in many ...