Water 2014, 6(1), 150-180; doi:10.3390/w6010150
Article

The Water Quality of the River Enborne, UK: Observations from High-Frequency Monitoring in a Rural, Lowland River System

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Received: 15 November 2013; in revised form: 2 January 2014 / Accepted: 8 January 2014 / Published: 17 January 2014
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: This paper reports the results of a 2-year study of water quality in the River Enborne, a rural river in lowland England. Concentrations of nitrogen and phosphorus species and other chemical determinands were monitored both at high-frequency (hourly), using automated in situ instrumentation, and by manual weekly sampling and laboratory analysis. The catchment land use is largely agricultural, with a population density of 123 persons km−2. The river water is largely derived from calcareous groundwater, and there are high nitrogen and phosphorus concentrations. Agricultural fertiliser is the dominant source of annual loads of both nitrogen and phosphorus. However, the data show that sewage effluent discharges have a disproportionate effect on the river nitrogen and phosphorus dynamics. At least 38% of the catchment population use septic tank systems, but the effects are hard to quantify as only 6% are officially registered, and the characteristics of the others are unknown. Only 4% of the phosphorus input and 9% of the nitrogen input is exported from the catchment by the river, highlighting the importance of catchment process understanding in predicting nutrient concentrations. High-frequency monitoring will be a key to developing this vital process understanding.
Keywords: water chemistry; nitrogen; phosphorus; turbidity; conductivity; eutrophication; septic tanks; sewage treatment; high frequency; diurnal dynamics
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MDPI and ACS Style

Halliday, S.J.; Skeffington, R.A.; Bowes, M.J.; Gozzard, E.; Newman, J.R.; Loewenthal, M.; Palmer-Felgate, E.J.; Jarvie, H.P.; Wade, A.J. The Water Quality of the River Enborne, UK: Observations from High-Frequency Monitoring in a Rural, Lowland River System. Water 2014, 6, 150-180.

AMA Style

Halliday SJ, Skeffington RA, Bowes MJ, Gozzard E, Newman JR, Loewenthal M, Palmer-Felgate EJ, Jarvie HP, Wade AJ. The Water Quality of the River Enborne, UK: Observations from High-Frequency Monitoring in a Rural, Lowland River System. Water. 2014; 6(1):150-180.

Chicago/Turabian Style

Halliday, Sarah J.; Skeffington, Richard A.; Bowes, Michael J.; Gozzard, Emma; Newman, Jonathan R.; Loewenthal, Matthew; Palmer-Felgate, Elizabeth J.; Jarvie, Helen P.; Wade, Andrew J. 2014. "The Water Quality of the River Enborne, UK: Observations from High-Frequency Monitoring in a Rural, Lowland River System." Water 6, no. 1: 150-180.


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