New unstructured mesh water quality model for coastal discharges

Johannes Lawen, Huaming Yu, Georg Fieg, Ahmed Abdel-Wahab

Research output: Contribution to journalArticle

1 Citation (Scopus)


A new unstructured mesh coastal water and air quality model has been developed that includes species transport, nonlinear decay, byproduct formation and mass-exchange between sea and atmosphere. The model has been programmed with a graphical interface and is applicable to coastal seawater, lakes and rivers. Focused on species conversion and interaction with the atmosphere, the water and air quality model follows a modular approach. It is a compatible module which simulates distributions based on fluid dynamic field data of underlying existing hydrodynamic and atmospheric simulations. Nonlinear and spline approximations of decay and growth kinetics, byproduct formation and joint sea-atmosphere simulation have been embedded. The Windows application software includes functions allowing error analysis concerning mesh and finite volume approximation. In this work, an anoxic submerged process-water discharge has been simulated. An error analysis has been carried out by varying vertical meshing, time-steps and comparing results based on explicit and implicit finite volume approximation.

Original languageEnglish
Pages (from-to)330-335
Number of pages6
JournalEnvironmental Modelling and Software
Publication statusPublished - 1 Feb 2013



  • Adaptive upwind
  • Finite volumes
  • Hypoxia
  • Parabolic PDE
  • Water quality model

ASJC Scopus subject areas

  • Software
  • Environmental Engineering
  • Ecological Modelling

Cite this