Michael Bruen

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Recent extensive water quality surveys in Ireland revealed that diffuse phosphorus (P) pollution originating from agricultural land and transported by runoff and subsurface flows is the primary cause of the deterioration of surface water quality. P transport from land to water can be described by mathematical models that vary in modelling approach,(More)
Forecasts of changes in precipitation (P) and potential evaporation (PE) can be applied to hydrologic models calibrated on existing conditions to obtain predictions of changes in runo€. This study describes an alternative approach, which uses a simple soilmoisture accounting model with a small number of independent and physically based parameters to explore(More)
The purpose of this study is to optimize adsorption conditions of powdered alum sludge (PAS) as low-cost adsorbent for the removal of three P-species (ortho-P, poly-P and organic-P) from wastewater using the response surface methodology (RSM). Initially, RSM in the basis of a 3-variable Box-Behnken design was used to determine the effect of pH (from 4 to(More)
Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan 2 Department of Geosciences, Idaho State University, USA 3 Grassland Ecosystem Research Unit, French National Institute for Agricultural Research, Clermont-Ferrand, France UCD Centre for Water Resources Research, University College Dublin, Ireland(More)
Publisher's statement This is the author’s version of a work that was accepted for publication in Separation and Purification Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to(More)
Highway runoff has been identified as a significant source of contaminants that impact on the receiving aquatic environment. Several studies have been completed documenting the characteristics of highway runoff and its implication to the receiving water in the UK and elsewhere. However, very little information is available for Ireland. The objective of this(More)
In the early days of Systems Analysis the focus was on providing tools for optimisation, modelling and simulation for use by experts. Now there is a recognition of the need to develop and disseminate tools to assist in making decisions, negotiating compromises and communicating preferences that can easily be used by stakeholders without the need for(More)
Grid-oriented, physically based catchment models calculate fields of various hydrological variables relevant to phosphorus detachment and transport. These include (i) for surface transport: overland flow depth and flow in the coordinate directions, sediment load, and sediment concentration and (ii) for subsurface transport: soil moisture and hydraulic head(More)