Using a multi-dimensional approach for catchment scale herbicide pollution assessments.
AuthorKhan, Majid Ali
Costa, Fabiola Barros
MetadataShow full item record
StatisticsDisplay Item Statistics
CitationM.A. Khan, F.B. Costa, O. Fenton, et al., Using a multidimensional approach for catchment scale herbicide pollution assessments, Science of the Total Environment. 2020, 747, 141232. DOI: https://doi.org/10.1016/j.scitotenv.2020.141232
AbstractWorldwide herbicide use in agriculture, whilst safeguarding yields also presents water quality issues. Controlling factors in agricultural catchments include both static and dynamic parameters. The present study investigated the occurrence of herbicides in streams and groundwater in two meso-scale catchments with contrasting flow controls and agricultural landuse (grassland and arable land). Using a multi-dimensional approach, streams were monitored from November 2018 to November 2019 using Chemcatcher® passive sampling devices and groundwater was sampled in 95 private drinking water wells. The concentrations of herbicides were larger in the stream of the Grassland catchment (8.9-472.6 ng L-1) dominated by poorly drained soils than in the Arable catchment (0.9-169.1 ng L-1) dominated by well-drained soils. Incidental losses of herbicides during time of application and low flows in summer caused concentrations of MCPA, Fluroxypyr, Trichlorpyr, Clopyralid and Mecoprop to exceeded the European Union (EU) drinking water standard due to a lack of dilution. Herbicides were present in the stream throughout the year and the total mass load was higher in winter flows, suggesting a persistence of primary chemical residues in soil and sub-surface environments and restricted degradation. Losses of herbicides to the streams were source limited and influenced by hydrological conditions. Herbicides were detected in 38% of surveyed drinking water wells. While most areas had concentrations below the EU drinking water standard some areas with well-drained soils in the Grassland catchment, had concentrations exceeding recommendations. Individual wells had concentrations of Clopyralid (619 ng L-1) and Trichlorpyr (650 ng L-1). Despite the study areas not usually associated with herbicide pollution, and annual mass loads being comparatively low, many herbicides were present in both surface and groundwater, sometimes above the recommendations for drinking water. This whole catchment assessment provides a basis to develop collaborative measures to mitigate pollution of water by herbicides.
The following license files are associated with this item:
- Creative Commons
Except where otherwise noted, this item's license is described as Copyright © 2020 The Authors. Published by Elsevier B.V. All rights reserved.
- Calibration and application of the Chemcatcher® passive sampler for monitoring acidic herbicides in the River Exe, UK catchment.
- Authors: Townsend I, Jones L, Broom M, Gravell A, Schumacher M, Fones GR, Greenwood R, Mills GA
- Issue date: 2018 Sep
- Auxin Herbicides and Pesticide Mixtures in Groundwater of a Canadian Prairie Province.
- Authors: Munira S, Farenhorst A, Sapkota K, Nilsson D, Sheedy C
- Issue date: 2018 Nov
- Pesticides in stream water within an agricultural catchment in southern Sweden, 1990-1996.
- Authors: Kreuger J
- Issue date: 1998 May 27
- Approaches to herbicide (MCPA) pollution mitigation in drinking water source catchments using enhanced space and time monitoring.
- Authors: Morton PA, Cassidy R, Floyd S, Doody DG, McRoberts WC, Jordan P
- Issue date: 2021 Feb 10
- Integrated modeling of agricultural scenarios (IMAS) to support pesticide action plans: the case of the Coulonge drinking water catchment area (SW France).
- Authors: Vernier F, Leccia-Phelpin O, Lescot JM, Minette S, Miralles A, Barberis D, Scordia C, Kuentz-Simonet V, Tonneau JP
- Issue date: 2017 Mar