Now showing items 1-17 of 17

    • 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 ...
    • Application of water quality index models to an Irish estuary 

      Uddin, Md Galal; Nash, Stephen; Olbert, Agnieszka Indiana (Civil Engineering Research Association of Ireland (CERAI), 2020-08-27)
      The paper investigates the application of different Water Quality Index (WQI) models for to estuarine waters. WQI models are aggregation based mathematical models that convert extensive water quality data into a single ...
    • Assessment of water quality using Water Quality Index (WQI) models and advanced geostatistical technique 

      Uddin, Md Galal; Olbert, Agnieszka Indiana; Nash, Stephen (Civil Engineering Research Association of Ireland (CERAI), 2020-08-27)
      Water quality index (WQI) models are popular tools to evaluate the quality of water; as such they have been developed and used by many agencies worldwide. However, the WQI model may generate excessive uncertainties in ...
    • The effects of array configuration on the hydro-environmental impacts of tidal turbines. 

      Fallon, David; Nash, Stephen (2012)
      Tidal stream turbines provide a technically viable means of generating electricity from a sustainable resource; however, economic viability will require the deployment of multiple devices in array formations in a manner ...
    • Galway Bay bathymetry comparison from Admiralty Chart and LiDAR datasets. 

      Fallon, David; Nash, Stephen (2012)
      The primary objective of this paper was to test the sensitivity of numerical models to bathymetry datasets. Bathymetric datasets used were from; 1) Admiralty Charts and 2) LiDAR & Multi- Beam Echo Sounder surveys. The ...
    • Interactions, mechanisms and impact of future coastal urban flooding. A case study of Cork city 

      Kirkpatrick, Jennifer Isabel Munro; Nash, Stephen; Hartnett, Michael; Comer, Joanne; Olbert, Agnieszka Indiana (Hydrology Ireland, 2020-11-17)
      In coastal floodplains, high river flows and high coastal water levels can result in extensive flooding. Mechanisms of flooding play a crucial role in flood characteristics with distinctive differences in flood wave ...
    • 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 ...
    • 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 ...
    • A nested version of the combined hydrodynamic and water quality model, DIVAST 

      Nash, Stephen (2007)
      The present research deals with the development of a one-way nested version of the combined hydrodynamic and water quality model DIVAST (Depth Integrated Velocity and Solute Transport). Initial research has concentrated ...
    • Numerical simulation and assessment of the effects of inlet configuration on the flushing time of a potable water service reservoir 

      O'Neill, Colin J.; Nash, Stephen; Clifford, Eoghan; Mullligan, Sean (Conferences and Events at DigitalCommons@USU, 2018-05-15)
      Service reservoirs provide the dual function of balancing supply with demand and providing adequate pressure in the water supply network by maintaining sufficient pressure head. In a potable water service reservoir, the ...
    • 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 ...
    • Turbulence modelling using 3DVAR data assimilation in laboratory conditions 

      Olbert, Agnieszka Indiana; Nash, Stephen; Hartnett, Michael (2013)
      The viability of turbulence parameter estimation in a numerical model using 3DVAR data assimilation technique is explored in this research. Water currents measured in a physical model are assimilated into the numerical ...
    • The use of digital resources in civil engineering education: Enhancing student learning and achieving accreditation criteria. 

      Nash, Stephen; McCabe, Bryan; Goggins, Jamie; Healy, Mark G. (2012)
      The use of digital resources in higher education has risen significantly over the last ten years and will continue to do so for the foreseeable future. The challenge for educational instructors is in determining how to ...
    • Vortex drop shaft structures: state-of-the-art and future trends 

      Mulligan, Sean; Plant, Joss; Nash, Stephen; Clifford, Eoghan (International Association for Hydro-Environment Engineering and Research (IAHR), 2019-09-01)
      Vortex drop shaft structures have played a critical role in hydraulic engineering; from one of their first applications in hydroelectric energy dissipation in the 1940s, to numerous contemporary installations throughout modern ...