High temporal resolution monitoring of multiple pollutant responses in drainage from an intensively managed grassland catchment caused by a summer storm

S. Granger, J. Hawkins, R. Bol, S. White, P. Naden, G. Old, Gary Bilotta, R.E. Brazier, C.J.A. Macleod, P.M. Haygarth

Research output: Contribution to journalArticle

Abstract

This work presents data on a suite of diffuse pollutants, monitored in a stream draining an intensively managed grassland on a 30 min time step during a period of intense rainfall to better understand their sources and pathways. Nitrite (92 μg l−1), particulate phosphorus (107 μg l−1) and soluble phosphorus (74 μg l−1) exceeded environmental limits during base flow. Concentrations of nitrate and nitrite were decreased during the storm event, whereas all other pollutants generally increased and exceeded environmental limits where specified, especially when associated with a small subsidiary hydrograph on the rising limb of the main hydrograph. Total pollutants loads, when using a 60 min sampling frequency, would have led to significant over and underestimations depending on which 60 min sample set was used. In the worst case, loads of ammonium could have been under-estimated by 35% or over estimated by 25% with errors being associated with loads on the rising limb of the hydrograph and more specifically a small subsidiary hydrograph. This subsidiary hydrograph may have occurred as a result of runoff from the farm hard standings within the catchment. Incidental transfer of pollutants associate with this runoff have masked the overall grassland pollutant response. To better understand these different source areas and pollutant dynamics, there is a need for novel tracing techniques to elucidate their relative contribution and pathways.
Original languageEnglish
Pages (from-to)377-393
Number of pages17
JournalWater, Air and Soil Pollution
Volume205
Issue number1-4
Publication statusPublished - 2010

Fingerprint

hydrograph
grassland
catchment
drainage
pollutant
summer
monitoring
nitrite
limb
runoff
phosphorus
baseflow
ammonium
farm
nitrate
rainfall
sampling

Keywords

  • Diffuse pollution
  • Incidental transfer
  • Phosphorus
  • Sediment
  • Ammonium
  • Nitrate
  • Nitrite
  • Dissolved carbon

Cite this

Granger, S. ; Hawkins, J. ; Bol, R. ; White, S. ; Naden, P. ; Old, G. ; Bilotta, Gary ; Brazier, R.E. ; Macleod, C.J.A. ; Haygarth, P.M. / High temporal resolution monitoring of multiple pollutant responses in drainage from an intensively managed grassland catchment caused by a summer storm. In: Water, Air and Soil Pollution. 2010 ; Vol. 205, No. 1-4. pp. 377-393.
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Granger, S, Hawkins, J, Bol, R, White, S, Naden, P, Old, G, Bilotta, G, Brazier, RE, Macleod, CJA & Haygarth, PM 2010, 'High temporal resolution monitoring of multiple pollutant responses in drainage from an intensively managed grassland catchment caused by a summer storm', Water, Air and Soil Pollution, vol. 205, no. 1-4, pp. 377-393.

High temporal resolution monitoring of multiple pollutant responses in drainage from an intensively managed grassland catchment caused by a summer storm. / Granger, S.; Hawkins, J.; Bol, R.; White, S.; Naden, P.; Old, G.; Bilotta, Gary; Brazier, R.E.; Macleod, C.J.A.; Haygarth, P.M.

In: Water, Air and Soil Pollution, Vol. 205, No. 1-4, 2010, p. 377-393.

Research output: Contribution to journalArticle

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T1 - High temporal resolution monitoring of multiple pollutant responses in drainage from an intensively managed grassland catchment caused by a summer storm

AU - Granger, S.

AU - Hawkins, J.

AU - Bol, R.

AU - White, S.

AU - Naden, P.

AU - Old, G.

AU - Bilotta, Gary

AU - Brazier, R.E.

AU - Macleod, C.J.A.

AU - Haygarth, P.M.

PY - 2010

Y1 - 2010

N2 - This work presents data on a suite of diffuse pollutants, monitored in a stream draining an intensively managed grassland on a 30 min time step during a period of intense rainfall to better understand their sources and pathways. Nitrite (92 μg l−1), particulate phosphorus (107 μg l−1) and soluble phosphorus (74 μg l−1) exceeded environmental limits during base flow. Concentrations of nitrate and nitrite were decreased during the storm event, whereas all other pollutants generally increased and exceeded environmental limits where specified, especially when associated with a small subsidiary hydrograph on the rising limb of the main hydrograph. Total pollutants loads, when using a 60 min sampling frequency, would have led to significant over and underestimations depending on which 60 min sample set was used. In the worst case, loads of ammonium could have been under-estimated by 35% or over estimated by 25% with errors being associated with loads on the rising limb of the hydrograph and more specifically a small subsidiary hydrograph. This subsidiary hydrograph may have occurred as a result of runoff from the farm hard standings within the catchment. Incidental transfer of pollutants associate with this runoff have masked the overall grassland pollutant response. To better understand these different source areas and pollutant dynamics, there is a need for novel tracing techniques to elucidate their relative contribution and pathways.

AB - This work presents data on a suite of diffuse pollutants, monitored in a stream draining an intensively managed grassland on a 30 min time step during a period of intense rainfall to better understand their sources and pathways. Nitrite (92 μg l−1), particulate phosphorus (107 μg l−1) and soluble phosphorus (74 μg l−1) exceeded environmental limits during base flow. Concentrations of nitrate and nitrite were decreased during the storm event, whereas all other pollutants generally increased and exceeded environmental limits where specified, especially when associated with a small subsidiary hydrograph on the rising limb of the main hydrograph. Total pollutants loads, when using a 60 min sampling frequency, would have led to significant over and underestimations depending on which 60 min sample set was used. In the worst case, loads of ammonium could have been under-estimated by 35% or over estimated by 25% with errors being associated with loads on the rising limb of the hydrograph and more specifically a small subsidiary hydrograph. This subsidiary hydrograph may have occurred as a result of runoff from the farm hard standings within the catchment. Incidental transfer of pollutants associate with this runoff have masked the overall grassland pollutant response. To better understand these different source areas and pollutant dynamics, there is a need for novel tracing techniques to elucidate their relative contribution and pathways.

KW - Diffuse pollution

KW - Incidental transfer

KW - Phosphorus

KW - Sediment

KW - Ammonium

KW - Nitrate

KW - Nitrite

KW - Dissolved carbon

M3 - Article

VL - 205

SP - 377

EP - 393

JO - Water, Air and Soil Pollution

JF - Water, Air and Soil Pollution

SN - 0049-6979

IS - 1-4

ER -