Modelling

Source-pathway-receptor

Terrachem is capable of applying geochemical modelling to various geochemical problems, including environmental, industrial or other relevant geochemical questions.

Modelling services include:

Geochemical speciation modelling - Geochemical speciation modelling can be used to simulate geochemical behaviour of elements of interest. Specialist geochemistry skills are necessary to interpret model results and to optimise models, since theortical calculations are seldom accurate except in simple geochemical systems. Normally suitable empirical data are necessary to to inform and validate geochemical models. Modelling may be limited to static equilibrium conditions in simple systms or more frequently may involve kinetic (reaction rate dependent) or reactive transport (reaction and fluid transport dependent) systems.

Mass balance modelling - Mass balance modelling is generally carried out to track water, solutes and / or solids. Such models are normally used to support water and waste management planning and practices and to identify relevant processes. Mass balance modelling may be coupled with geochemical speciation to improve accuracy in the modelling of fluid and contaminant transport. Gas behaviour and transport may also be an important factor in such modelling.

Source, Pathway, Receptor modelling - According to environmental risk assessment principles, pollution requires a contaminant source, a transport pathway and a receptor where an impact may occur. Modelling may be the only way to realistically assess and constrain these entities, based on available empirical data. Source, Pathway, Receptor models may be constructed using various software packages, depending on the nature and complexity of the system of interest. Examples may include spreadsheets, stochastic time-series models or full 3D numerical models.