alexa The phosphorus budget of the Thame catchment, Oxfordshire, UK: 1. Mass balance.
Environmental Sciences

Environmental Sciences

Hydrology: Current Research

Author(s): Cooper DM, House WA, May L, Gannon B

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Abstract The relative magnitudes of annual diffuse and point source loads of phosphorus (P) to the River Thame were estimated from daily and monthly measurements of discharge and concentration. Existing data from gauging and monitoring sites on the river network and at point sources were supplemented by survey data at a range of spatial scales. Results showed that during low flow periods most of the P could be attributed to point sources, while at high flows the figure was less than 10\%. The introduction of P stripping at Aylesbury, a major sewage treatment works in the catchment, was estimated to have reduced the annual load of P from the sewage treatment works by approximately 45 t, with a similar reduction in loss from the catchment. This gave a reduction in low flow concentrations of soluble reactive phosphorus (SRP) from 2.5 to 1.7 mg l(-1). Concentrations of SRP in river water remain above eutrophication thresholds because of the influence of other STWs in the catchment and insufficient natural discharge to dilute this.
This article was published in Sci Total Environ and referenced in Hydrology: Current Research

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