1991•PROCEEDINGS OF HYDRAULIC ENGINEERINGOpen access

Calculation of Water Quality in a Network of Tidal Rivers

Susumu Nakano, Satoshi Yamashita, Yoshihisa OZU, Hiroshi Mitsui

Abstract

The purpose of this paper was the investigation of a numerical calculation method for a diffusion of pollution in a network of tidal rivers. Using the split-operator approach, an advective transport process was calculated by the two-point fourth-order Holly-Preissmann scheme and a dispersion process was calculated by the Crank-Nicholson scheme. The method of applying these schemes to the confluence and branching of a river were investigated. The calculated results for the Shinmachi River system were consistent with the observed ones.

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Key concepts: Advection, Confluence, Hydrology (agriculture), Dispersion (optics), Crank–Nicolson method, Diffusion, Environmental science, Process (computing)