PURPOSE. This Coastal and Hydraulics Engineering Technical Note (CHETN) provides information about an improved capability to mathematically model overwash caused by elevated water elevation and wave runup. An upgrade to SBEACH (Storm-induced BEAch CHange Model, a numerical model for simulating storm-induced beach profile change) is described to simulate sediment transport and subaerial profile ...

sewerage projects. He was well versed in hydraulics. He could build a dam or reservoir, and lay pipes and sewers. He knew a little bit of plumbing, but was not so sure of his ground in the installation of pumps and engines. He felt equally competent to construct irrigation works, water-works, or land drainage works, because the applications of hydraulics were involved in all these. As regards w...

A new modeling language, called Modelica, for physical modeling is being developed in an international effort. The main objective is to make it easy to exchange models and model libraries for different domains, such as, mechanical, pneumatics, electrical, hydraulics, and others. The design approach builds on non-causal modeling with true ordinary differential and algebraic equations and the use...

This paper discusses the possibility to use low-cost on/off valves instead of servo valves even in demanding servo applications. Different on/off control techniques are first reviewed and analyzed. Then the basic principles of suggested Digital Hydraulics technology are introduced and some tracking control results are presented. Results show that energy efficient and high-quality position and v...