- Postgraduate Researcher
Philip graduated with a BSc in Geography in 2010 from University of Vienna and with a MSc in Integrated Water Resources Management in 2012 from FH Cologne. After his graduation, Philip worked for several years for the German Geological Survey BGR in Lebanon, Niger and Germany.
The objectives of his research are: 1) to distinguish between diffuse and conduit flow pathways in karst aquifers using chemical and hydrograph separation techniques; 2) to incorporate this refined knowledge of diffuse flow pathways into hydrological models of different karst systems; and 3) to use models to study contaminant transport and climate change scenarios.
Almost half of the Republic of Ireland is covered by karstified Carboniferous limestones. Karstified limestone, or karst, describes rocks that are prone to dissolution processes forming small fissures, conduits and even caves. Karst formations are important sources of water, yet, because of their high degree of permeability they are vulnerable towards anthropogenic contamination from the land surface.
This research aims to better understand slow flow dynamics of groundwater in small fissures in karst. The results will add knowledge to the understanding of flooding mechanisms or to the transport of contaminants in karst groundwater systems.
Project title: Characterisation of diffuse recharge into karst aquifers using chemical and numerical modelling techniques
Karstic systems are highly heterogeneous geological formations which are characterised by multi-scale temporal and spatial hydrologic behaviour. Karst aquifers are usually described in terms of three distinct types of porosity models: matrix, fracture and conduit permeabilities.
The aim of the research is to quantify diffuse groundwater recharge in order to develop more realistic numerical models of the systems, incorporating turbulent flow in conduits and laminar flow in fissures. The numerical models shall serve as decision support systems for the prediction of the response of karst aquifers towards climate change or for the development of engineering solutions to potential flooding predictions and the evaluation of contaminant transport and land-use options.
The investigative techniques will involve both chemical (isotopic and trace element water quality) and spring hydrograph source separation techniques. A variety of numerical techniques will be applied (correlation, spectral analyses and wavelets) to determine the relationships between the rainfall input signals and response of karst systems.
The research will be conducted in three different field sites: a) a karst aquifer with significant allogenic input; b) an upland karst aquifer (Burren) with all autogenic recharge; and c) a lowland midland karst aquifer with slower diffuse autogenic input.
- Postgraduate Researcher
- Earth System Change
- Connected Waters