Abstract: The standard one‐dimensional equations of unsteady sediment‐transport are examined, and multiple time (or length) scales are identified. The existence of multiple scales may lead to a singularly perturbed behavior that ...

Abstract: The stability and convergence characteristics of a four‐point implicit finite‐difference scheme due to Preissmann, which has been widely used in open‐channel flow modeling, are examined. The analysis is made for a general ...

Abstract: Numerical simulations have been performed to gain a better understanding of ultraviolet (UV) disinfection process performance. Similar simulations in previous studies revealed critical paths through which particles moved ...

Abstract: Lagrangian actinometry represents a new method of photochemical reactor characterization. The method is based on an application of dyed microspheres, which were developed by attachment of