High-frequency phosphorus monitoring for water quality management

Using high-frequency phosphorus monitoring for water quality management: a case study of the upper River Itchen, UK

Gary R. Fones & Adil Bakir & Janina Gray & Lauren Mattingley & Nick Measham & Paul Knight & Michael J. Bowes & Richard Greenwood & Graham A. Mills

Abstract Increased concentrations of phosphorus (P) in riverine systems lead to eutrophication and can contribute to other environmental effects. Chalk rivers are known to be particularly sensitive to elevated P levels. We used high-frequency (daily) automatic water sampling at five distinct locations in the upper River Itchen (Hampshire, UK) between May 2016 and June 2017 to identify the main P species……..

Read the full paper HERE

Dr Janina Gray, Head of Science & Environmental Policy at S&TC said: 

"This peer-reviewed article has come from our phosphate (p) monitoring work on the Itchen. It highlights the spiky nature of P, which is typically missed in the EA’s current monthly monitoring regime, and the need to better understand the impact these spikes could be having on river ecology. As a next step, S&TC, alongside EA and HIWWT, have joint funded a PhD at Nottingham University, which started in Sept 2019, to investigate the ecological impact of the P spikes."

Nick Measham, S&TC Deputy CEO said:

"We have already taken this science and turned it into action. The work underpinned changes to watercress companies’ discharge permits on the Itchen and contributed to a massive reduction of this pollutant in the river. 

The spiky nature of the discharge implies that the EA’s monthly sampling, combined with permit limits set in terms of annual averages, does not provide the protection our rivers need. Permit reform and the use of monitoring technology is urgently required. The current regime makes no sense.

Much more remains to be done but this is a start."