Now showing items 1-20 of 24

  • Adaptive Mesh Multi-Scale Modelling of Tidal Hydraulics and Material Transport 

    Nash, Stephen; Hartnett, Michael (2011)
    Multi-scale modelling for structured meshes is achieved by nesting high resolution grids within lower resolution grids. By specifying high resolutions in areas of interest only, computational cost can be reduced. Adaptive ...
  • An adaptive mesh solute transport model 

    Nash, Stephen; Hartnett, Michael (2009)
    An adaptive mesh solute transport model is presented. The adaptive mesh scheme is implemented in a one-way multiply nested version of the hydrobiological model DIVAST (Depth Integrated Velocity and Solute Transport). The ...
  • Assessment of Tc-99 monitoring within the western Irish Sea using a numerical model 

    Olbert, Agnieszka Indiana; Hartnett, Michael; Dabrowski, Tomasz (Elsevier ScienceDirect, 2010-05-26)
    Water circulation patterns and associated material transport within a highly dynamic system such as the Irish Sea are complex phenomena. Although Tc-99 monitoring programme undertaken by the Radiological Protection Institute ...
  • Cyclonic circulation in the western Irish Sea in future climate 

    Olbert, Agnieszka Indiana; Hartnett, Michael; Dabrowski, Tomasz (International Association for Hydro-Environment Engineering and Research, 2011-07-01)
    The Irish Sea (IS) is a semi-enclosed body of water on the European Continental Shelf and the Western Irish Sea Gyre (WISG) is a characteristic phenomenon of the Sea. The gyre due to its significant effects on the circulation, ...
  • Development of a nested coastal circulation model: boundary error reduction 

    Nash, Stephen; Hartnett, Michael (Elsevier, 2014-03)
    Numerical models have a valuable role to play in the sustainable management of coastal waters but accurate simulation of land/sea interactions, particularly in areas of complex coastlines, requires the use of high spatial ...
  • The effects of array configuration on the hydro-environmental impacts of tidal turbines 

    Fallon, David; Hartnett, Michael; Olbert, Agnieszka Indiana; Nash, Stephen (Elsevier, 2014-04)
    The economic viability of tidal turbines will require the deployment of multiple devices in array formations in a manner analogous to wind farms. This research investigates the effects of the configuration of a tidal turbine ...
  • Effects of complex hydrodynamic processes on the horizontal and vertical distribution of Tc-99 in the Irish Sea 

    Olbert, Agnieszka Indiana; Hartnett, Michael; Dabrowski, Tomasz (Elsevier ScienceDirect, 2010-10-14)
    The increased discharge of Tc-99 from the Sellafield plant following the commissioning of the Enhance Actinide Removal Plant in 1994 was reflected in higher Tc-99 activity concentrations over much of the Irish Sea The ...
  • An integrated approach to trophic assessment of coastal waters incorporating measurement, modelling and water quality classification 

    Hartnett, Michael; Nash, Stephen; Olbert, Agnieszka Indiana (2012)
    Various protocols have been developed for trophic assessment of coastal waters but most incorporate single value compliance criteria for water quality parameters which, in reality, exhibit significant spatial variation. ...
  • Irish estuaries: Water quality status and monitoring implications under the water framework directive 

    Hartnett, Michael; Nash, Stephen (2011)
    The status of water quality of Irish estuaries is reviewed; this sheds light on the rationale behind the design of the national monitoring programme. Relative to other EU Member States, Ireland's coastal monitoring programme ...
  • Long-term inter-annual variability of a cyclonic gyre in the western Irish Sea 

    Olbert, Agnieszka Indiana; Hartnett, Michael; Dabrowski, Tomasz (Elsevier ScienceDirect, 2011-05-26)
    The western Irish Sea gyre (WISG) is a cyclonic baroclinic flow around a dome of stagnant water which develops each year during the heating season in the western Irish Sea. Research was carried out to determine long-term ...
  • Mechanisms of flooding in Cork City 

    Olbert, Agnieszka Indiana; Comer, Joanne; Nash, Stephen; Hartnett, Michael (International Association of Hydrological Sciences, 2015-11-17)
    Flooding is one of the most frequent and devastating natural disasters. Many urban developments are located in estuaries where river flow and sea water merge. Cork City situated in the River Lee estuary frequently subject ...
  • Modelling nutrient and chlorophyll_a dynamics in an Irish brackish waterbody 

    Hartnett, Michael; Nash, Stephen (Elsevier, 2004-01)
    This paper presents aspects of a research investigation into nutrient fluxes into and out of an important Irish estuary, Wexford Harbour, located in the southeast of Ireland. Details of the methodology applied, the data ...
  • Modelling nutrients and chlorophyll-a dynamics in an Irish brackish waterbody 

    Hartnett, Michael; Nash, Stephen (Elsevier, 2004)
    This paper presents aspects of a research investigation into nutrient fluxes into and out of an important Irish estuary, Wexford Harbour, located in the southeast of Ireland. Details of the methodology applied, the data ...
  • Modelling phytoplankton dynamics in a complex estuarine system 

    Nash, Stephen; Hartnett, Michael; Dabrowski, Tomasz (2011)
    The primary objective of this research was to develop a generic methodology for numerical modelling of the water quality within estuarine systems; in particular, this research focused on modelling nutrient dynamics and ...
  • Nested circulation modelling of inter-tidal zones: details of a nesting approach incorporating moving boundaries 

    Nash, Stephen; Hartnett, Michael (2010)
    Nested circulation models developed to date either exclude the flooding and drying process or prohibit flooding and drying of nested boundaries; they are therefore ill-suited to the accurate modelling of inter-tidal areas. ...
  • A nested hydrodynamic model incorporating flooding and drying 

    Nash, Stephen; Hartnett, Michael (2009)
    A one-way nested version of the hydrobiological model DIVAST (Depth Integrated Velocity and Solute Transport) is introduced. The nested model allows flooding and drying of intertidal areas, a process often present in areas ...
  • Nutrient dynamics in Cork Harbour 

    Nash, Stephen; Hartnett, Michael (2005)
    Estuaries are commonly characterised by high productivity due to frequent if not continuous inputs of nutrients from domestic and industrial discharge effluents and from freshwater and marine sources. These forms of nutrient ...
  • Parameterization of turbulence models using 3DVAR data 

    Olbert, Agnieszka Indiana; Nash, Stephen; Hartnett, Michael (City University of New York, 2014-01-08)
    In this research the 3DVAR data assimilation scheme is implemented in the numerical model DIVAST in order to optimize the performance of the numerical model by selecting an appropriate turbulence scheme and tuning its ...
  • A Performance Assessment Protocol for Structured Mesh Multi-Scale Models 

    Nash, Stephen; Hartnett, Michael (2011)
    Nesting techniques are used to develop multi-scale models giving higher resolution and thus greater accuracy in nested domains. The assessment of model accuracy is therefore important for the successful implementation of ...
  • Regional modelling of the 21st century climate changes in the Irish Sea 

    Olbert, Agnieszka Indiana; Dabrowski, Tomasz; Nash, Stephen; Hartnett, Michael (Elsevier, 2012-06)
    An assessment of the complex evolution of climate change signals in the Irish Sea over the 21st century is presented in this paper. Potential impacts of climate change on the local hydrography are explored and interrelationships ...