Environmental modeling
The Mannvit team can supply environmental modeling to serve as backbone in Environmental Impact Assessments (EIA) and assistance with the EIA for the project. The environmental modeling includes modeling air dispersion, surface water flow and groundwater flow to determine the environmental impacts of geothermal and hydroelectric power plants, aluminum smelters and various construction projects.

Modeling chemical dispersion in groundwater in response to geothermal water disposal
The construction and application of a numerical groundwater model for the estimation of heat or chemical dispersion due to geothermal effluent disposal is often required for the assessment of downstream effects in a groundwater aquifer, river, lake or coastal region.  The concerns often arise due to potential contamination of potable water resources or wildlife habitat. 

Modeling air dispersion of emissions from geothermal power plants
A numerical air dispersion model is constructed for the region of the power plant, extending beyond the area that is expected to be affected by the emissions.  The emissions to be investigated may be, for example, hydrogen sulphide (H2S) from present or proposed geothermal power stations.  The model would typically be applied for the assessment of concentrations of the target chemicals at particular locations either in response to particular meteorological scenarios or to normal conditions.  Such work involves the integration of meteorological model calculations and measurements.

Project example:
In 2008, Mannvit team member Vatnaskil commenced the development of air dispersion models for the National Power Company (Landsvirkjun) and Theistareykir ehf., to assess the dispersion of hydrogen sulphide (H2S) emissions from the geothermal power stations in Krafla, Krafla II, Bjarnarflag and Theistareykir, in North East Iceland.  The modeling work has provided estimates on expected H2S concentrations in the region for environmental impact assessment purposes and the evaluation of probabilities associated with H2S concentrations exceeding defined thresholds, such as human detection limits, comfort thresholds and WHO health guidelines.  Updates to these models followed and subsequent finalization of the dispersion assessment took place in 2010.