Water Quality

This is the user guide for the 1D Water Quality Solver, a program for modelling water quality in open channel networks. It is a user guide only and no detailed attempt is made to cover theory, although the equations on which 1D Water Quality Solver add-on is based are described. The user must refer to other texts for more detailed theory.

This guide describes the use of the 1D Water Quality Solver only and does not repeat the general information on the use of Flood Modeller 1D Solver which is contained in the Flood Modeller user guide. It is therefore necessary to be familiar with the use of Flood Modeller 1D Solver before using the 1D Water Quality Solver.

Modelling Processes

The 1D Water Quality Solver is used for modelling water quality in open channel systems such as rivers and estuaries. In order to use the 1D Water Quality Solver you must first create and run a 1D model of the system to provide flow data for use by the 1D Water Quality Solver.

The transport of pollutants is modelled by a finite difference approximation to the one-dimensional advection-diffusion equation.

Model boundaries are represented as concentration-time or concentration-flow relationships. Pollutants can also be introduced at or removed from any point in the model using the SOURCE feature.

The 1D Water Quality Solver is capable of modelling a range of water quality variables and processes simultaneously. These include:

• Conservative pollutants

• Decaying pollutants

• Coliforms

• Salt

• Water temperature

• Sediment

• Oxygen balance (DO, BOD)

• Water/Sediment oxygen interactions

• Phytoplankton

• Macrophytes

• Benthic algae

• pH

Related Topics

Technical Background

Installation

Preparing a Water Quality Datafile

Running a Water Quality Simulation

Accessing and Viewing Results

Datafile layout

Water Quality Processes