Hypersaline discharges are a class of marine discharge whose high salinities give rise to large density contrasts between the effluent and receiving waters. They are associated with solution mining activities, for example the leaching of subsea salt caverns to provide underground gas storage. Their salinities are considerably higher than typical discharges from desalination plants. As a result, they form strong density currents near the seabed, and can be a concern for benthos.
HR Wallingford was part of the External Consultative Group of an EPSRC-funded research project undertaken collaboratively by the Universities of Dundee, Bristol and Aberdeen, to improve understanding of the mixing and dispersion of hypersaline discharges. We analysed rare monitoring data from a hypersaline discharge site in UK coastal waters. The data were used to validate and enhance multi-scale modelling techniques developed in HR Wallingford’s Dense Jet Assessment Procedure (Wood & Mead, 2008).
As a result, HR Wallingford is currently the only consultancy to have a model procedure validated for use with hypersaline discharges (Wood et al, 2014).
Our research shows that HR Wallingford’s modelling tools accurately predict the behaviour of hypersaline and dense discharges. This validation gives our clients high confidence in our assessments for:
|Authors||Matthew Wood, Florence Henno, Alan Cooper, Chris Mead|
|Keywords||Discharge, dense jets, desalination, mixing zone, modelling, validation, brine, hypersaline|
Wood, M. J., Henno, F., and Mead, C. T., “Validation of computational models for hypersaline and other dense marine discharges.” Proc. 7th International Symposium on Environmental Hydraulics, Singapore, 7-9 January 2014
Modelled salinity patterns from our validation study