Hampshire Avon
Demonstration Test Catchment (DTC) Project

Hampshire Avon Demonstration Test Catchment (DTC) Project
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Professor Penny Johnes

Professor Penny Johnes is a nutrient hydrochemist with 25 years experience researching nitrogen (N), phosphorus (P) and carbon (C) transport in rivers, lakes and wetlands.

As Director of the Aquatic Environments Research Centre and Executive Director of HYDRA, a multi-institutional research partnership for hydrosciences research (www.hydra.uk.net) she has extensive project management experience. She has acted as PI or Co-PI on over 50 major research programmes, funded by NERC, Defra, Environment Agency, UKWIR and other Environment Research Funders, and has supervised a wide range of PhD students investigating nutrient transport and transformations in agricultural and semi-natural catchment systems.

Recent relevant programmes on which she acted or is acting as a PI or Co-I include the NERC funded Lowland Permeable Catchments Research Programme (LOCAR; 2002-2006), the Defra funded PSYCHIC Programme on Phosphorus and Sediment Yield in Catchments (Lead RO ADAS), and the UKWIR funded Validation of Guidelines for the Sustainable Application of Phosphorus in Biosolids to Agricultural Soils (Lead RO ADAS; 2008-2009).

She is also currently working as a Co-I on the NERC funded Pilot Virtual Observatory programme (2010-2012), and on the UKWIR funded programme investigating Phosphorus contributions from WwTW discharges to watercourses and their long term environmental impacts relative to other sources (2010-2012).

Her research focuses on processes controlling nutrient transport from land to water and within river, lake and wetland systems, dissolved organic N, P and C flux in river and wetland systems, and the role of sediments in the transport and transformation of C, N and P in rivers.

Her publications have received over 1100 citations in the Web of Science (>1300 citations in Google Scholar) and she is widely quoted on a range of international news media and internet based environmental information websites. Key findings from her research have highlighted the importance of organic N and particulate P fractions in the total nutrient load transported to and within aquatic systems; the importance of short-term, extreme flow controls on the nutrient source/sink function in wetlands; geochemical signatures as a means of characterising wetland functional units; and the uncertainties associated with nutrient load estimation based on low frequency, partial fraction monitoring data.