Identification of discharge zones and quantification of contaminant mass discharges into a local stream from a landfill in a heterogeneous geologic setting

Milosevic, Nemanja; Thomsen, Nanna Isbak; Juhler, René K.; Albrechtsen, Hans‐Jørgen; Bjerg, Poul Løgstrup

doi:10.1016/j.jhydrol.2012.04.012

Cited by 58 publications

(42 citation statements)

References 43 publications

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“…Conductivity, oxygen concentrations and pH were measured before collecting water samples for water chemistry. Water samples for cation were analysed according to the methods given in Milosevic et al (2012). The general water chemistry is summarised in Table 3 In 2011, a subset of the streams (sites 2, 3, 5, 6 and 7) were re-sampled during May and June using event-triggered water samplers.…”

Section: General Water Chemistrymentioning

confidence: 99%

“…In particular, BOD 5 (> 2 mg L -1 ), oxygen concentrations (< 5-6 mg L -1 ) and ammonium-N concentrations (> 0.2 mg L -1 ) were often measured at critical levels which are likely caused by anthropogenic sources such as agriculture, untreated wastewater from scattered dwellings (Friberg et al, 2010) and discharge from landfills (Milosevic et al, 2012). Moreover, nitrate-N, phosphate-P and potassium were often found at high concentrations documenting the heavy use of agricultural fertilisers for crops (Table 3).…”

Section: Characterisation Of Environmental Stressorsmentioning

confidence: 99%

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A catchment scale evaluation of multiple stressor effects in headwater streams

Rasmussen

McKnight

Loinaz

et al. 2013

Science of The Total Environment

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Mitigation activities to improve water quality and quantity in streams as well as stream management and restoration efforts are conducted in the European Union aiming to improve the chemical, physical and ecological status of streams. Headwater streams are often characterised by impairment of hydro-morphological, chemical, and ecological conditions due to multiple anthropogenic impacts. However, they are generally disregarded as water bodies for mitigation activities in the European Water Framework Directive despite their importance for supporting a higher ecological quality in higher order streams.We studied 11 headwater streams in the Hove catchment in the Copenhagen region. All sites had substantial physical habitat and water quality impairments due to anthropogenic influence (intensive agriculture, urban settlements, contaminated sites and low base-flow due to water abstraction activities in the catchment). We aimed to identify the dominating anthropogenic stressors at the catchment scale causing ecological impairment of benthic macroinvertebrate communities and provide a rank-order of importance that could help prioritising mitigation activities. We identified numerous chemical and hydromorphological impacts of which several were probably causing major ecological impairment, but we were unable to provide a robust rank-ordering of importance suggesting that targeted mitigation efforts on single anthropogenic stressors in the catchment are unlikely to have substantial effects on the ecological quality in these streams.The SPEcies At Risk (SPEAR) index explained most of the variability in the macroinvertebrate community structure, and notably, SPEAR index scores were often very low (< 10 % SPEAR abundance). An extensive re-sampling of a subset of the streams provided evidence that especially insecticides were probably essential contributors to the overall ecological impairment of these streams.Our results suggest that headwater streams should be considered in future management and mitigation plans. Catchment-based management is necessary because several anthropogenic stressors exceeded problematic thresholds, suggesting that more holistic approaches should be preferred.

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Section: General Water Chemistrymentioning

confidence: 99%

Section: Characterisation Of Environmental Stressorsmentioning

confidence: 99%

A catchment scale evaluation of multiple stressor effects in headwater streams

Rasmussen

McKnight

Loinaz

et al. 2013

Science of The Total Environment

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“…Discharge from contaminated sites, and in particular abandoned landfill sites, can include pesticides at 148 specific locations (Milosevic et al, 2012). All catchments are characterized by low elevations, 149 clayey/loamy soils, a temperate climate, and an average regional precipitation of 600 mm yr …”

Section: Introduction 28mentioning

confidence: 99%

Sources, occurrence and predicted aquatic impact of legacy and contemporary pesticides in streams

McKnight

Rasmussen

Kronvang

et al. 2015

Environmental Pollution

155

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11We couple current findings of pesticides in surface and groundwater to the history of pesticide usage, 12 focusing on the potential contribution of legacy pesticides to the predicted ecotoxicological impact on 13 benthic macroinvertebrates in headwater streams. Results suggest that groundwater, in addition to 14 precipitation and surface runoff, is an important source of pesticides (particularly legacy herbicides) 15 entering surface water. In addition to current-use active ingredients, legacy pesticides, metabolites and 16 impurities are important for explaining the estimated total toxicity attributable to pesticides. Sediment-17 bound insecticides were identified as the primary source for predicted ecotoxicity. Our results support 18 recent studies indicating that highly sorbing chemicals contribute and even drive impacts on aquatic 19 ecosystems. They further indicate that groundwater contaminated by legacy and contemporary 20 pesticides may impact adjoining streams. Stream observations of soluble and sediment-bound 21 pesticides are valuable for understanding the long-term fate of pesticides in aquifers, and should be 22 included in stream monitoring programs. 23Capsule: Legacy pesticides, particularly sediment-bound insecticides were identified as the primary 24 source for predicted ecotoxicity impacting benthic macroinvertebrates in headwater streams. 25 2

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“…The discharge of contaminated groundwater into streams may impact surface water quality, with contaminant loads originating from contaminated sites e.g., chlorinated solvents and other xenobiotic organic compounds (Conant et al 2004;Westbrook et al 2005;Chapman et al 2007) , old landfill sites (Milosevic et al 2012) or agricultural application of pesticides (McKnight et al 2012). Due to the implementation of the European Water Framework Directive (WFD) and the increasing exploitation of stream water and groundwater, an increasing effort is made to understand the linkage between these two systems and assesses the effect of groundwater contaminants on surface water ecosystems and chemical quality (Hancock 2002;McKnight et al 2010;Schmidt et al 2010;McKnight et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Field experimental studies have attempted to identify the surface water -groundwater interaction zones, quantify the inflow (Westbrook et al 2005;Milosevic et al 2012), and study the processes in the sediment bed during groundwater seepage (e.g., Conant et al 2004;Bianchin et al 2006;Chapman et al 2007;Ellis and Rivett 2007;McKnight et al 2010;Milosevic et al 2012). In field studies the contaminant discharged from a groundwater plume was rarely detected in the stream due to rapid dilution by clean stream water and there is little published work on the resultant concentration distribution along the stream.…”

Section: Introductionmentioning

confidence: 99%

Dilution and volatilization of groundwater contaminant discharges in streams

Aisopou¹,

Bjerg²,

Sonne³

et al. 2015

Journal of Contaminant Hydrology

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An analytical solution to describe dilution and volatilisation of a continuous groundwater contaminant plume into streams is developed for risk assessment. The location of groundwater plume discharge into the stream (discharge through the side versus bottom of the stream) and different distributions of the contaminant plume concentration (Gaussian, homogeneous or heterogeneous distribution) are considered. The model considering the plume discharged through the bank of the river, with a uniform concentration distribution was the most appropriate for risk assessment due to its simplicity and limited data requirements. The dilution and volatilisation model is able to predict the entire concentration field, and thus the mixing zone, maximum concentration and fully mixed concentration in the stream. It can also be used to identify groundwater discharge The dilution model can also provide recommendations for sampling locations and the size of impact zones in streams. This is of interest for regulators, for example when developing guidelines for the implementation of the European Water Framework Directive.3

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Identification of discharge zones and quantification of contaminant mass discharges into a local stream from a landfill in a heterogeneous geologic setting

Cited by 58 publications

References 43 publications

A catchment scale evaluation of multiple stressor effects in headwater streams

A catchment scale evaluation of multiple stressor effects in headwater streams

Sources, occurrence and predicted aquatic impact of legacy and contemporary pesticides in streams

Dilution and volatilization of groundwater contaminant discharges in streams

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