It has been estimated in the US that freshwater eutrophication can cost up to £1.7 billion per year in damage costs (Dodds et al., 2009), while in the UK, the cost has been put at £114 million per year ar (Pretty et al., 2003). The greatest proportion of these economic losses can be attributed to drinking water treatment costs, lakefront property values, cleanup costs to waterways to maintain flood defence and preserve channel capacity and reduced recreational and amenity value of water bodies for water sports, angling, and general amenities.
Due to improved management practice, the external nutrient loading has generally decreased to lakes during recent decades, however, many shallow eutrophic lakes still have difficulties in improving their ecological condition (Egemose et al., 2010). This lack of improvement is often caused by the release of years of accumulated nutrients (phosphorus) from the lake sediment into the water column during the spring and summer months. The increased bioavailable phosphorus then supports phytoplankton growth which can result in extreme ecological change for the aquatic system. Implied recovery times after cessation of nutrient inputs varies widely, but recent work has modelled recovery times of upwards to a century (McCrackin et al., 2017). The addition of phosphorus fixing chemicals have been used to improve lakes ecological condition and reverse eutrophication. This eutrophication management strategy is both expensive and the longterm success is uncertain, however, the results can be almost instantaneous. Knowledge of the effects of lake resuspension processes and sediment stabilization on phosphorus fixing chemicals is limited.
This project will work alongside a recently awarded INTERREG CatchmentCARE €13.7 million grant and use sediment trapping techniques and a remote access sampler to explore the behaviour and stability of sediments before and after a phosphorus fixing chemical has been added to a range of lakes.
The student will be trained in chemical techniques, GIS, boat handling and will use high resolution sampling equipment (e.g. Technicap sediment trap, Mclane Remote Access sampler and YSI Multiparameter Sondes) to investigate related sedimentation processes in lakes from border catchments in the North and South of Ireland.
The output of this project will improve the phosphorus fixing regime recommended for lakes dependent on basic knowledge of a lake’s sedimentation processes. This will result in the targeted and successful application of phosphorus fixing chemicals to problem lakes on a larger scale, improving both the trophic status and the economic impact.
Dodds, W.K., Bouska, W.W., Eitzmann, J.L., Pilger, T.J., Pitts, K.L., Riley, A.J., Schloesser, J.T. and Thornbrugh, D.J. (2009). "Eutrophication of US Freshwaters: Analysis of Potential Economic Damages." Environmental Science & Technology 43(1): 12-19.
Egemose, S., Reitzel, K., Andersen, F.O. and Flindt, M.R. (2010). "Chemical Lake Restoration Products: Sediment Stability and Phosphorus Dynamics." Environmental Science & Technology 44(3): 985-991.
McCrackin, M.L., Jones, H.P., Jones, P.C. and Moreno-Mateos, D. (2017). "Recovery of lakes and coastal marine ecosystems from eutrophication: A global meta-analysis." Limnology and Oceanography 62(2): 507-518.
Pretty, J.N., Mason, C.F., Nedwell, D.B., Hine, R.E., Leaf, S. and Dils, R. (2003). "Environmental costs of freshwater eutrophication in England and Wales." Environmental Science & Technology 37(2): 201-208.
If the University receives a large number of applicants for the project, the following desirable criteria may be applied to shortlist applicants for interview.
Vice Chancellors Research Scholarships (VCRS)
The scholarships will cover tuition fees and a maintenance award of £14,777 per annum for three years (subject to satisfactory academic performance). Applications are invited from UK, European Union and overseas students.
The scholarship will cover tuition fees at the Home rate and a maintenance allowance of £ 14,777 per annum for three years. EU applicants will only be eligible for the fees component of the studentship (no maintenance award is provided). For Non EU nationals the candidate must be "settled" in the UK.
Completing the MRes provided me with a lot of different skills, particularly in research methods and lab skills.
Michelle Clements Clements - MRes - Life and Health SciencesWatch Video
I would highly recommend Ulster University as you get so much support. Coleraine is a beautiful town and the people are so friendly. It was a really positive experience.
Carin Cornwall - PhD Environmental SciencesWatch Video
Monday 18 February 2019
w/c 18 March 2019
Our coastal and riverside campus focussing on science and health
When applying for this PhD opportunity please quote reference number: