Physico-chemical characteristics affect the spatial distribution of pesticide and transformation product loss to an agricultural brook

Gaßmann, Matthias; Olsson, Oliver; Stamm, Christian; Weiler, Markus; Kümmerer, Klaus

doi:10.1016/j.scitotenv.2015.06.068

Cited by 22 publications

(9 citation statements)

References 45 publications

(81 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Maximum concentrations and loads were detected on 21 October 2016 and 22 October 2016 due to a 3-day rainy period of 32 mm. The findings amounted to 1.74 μg M-OA Comparing the exported loads in the same periods of 2015 and 2016 (Table 6) at the outlet of the catchment, metazachlor While the export of metazachlor in 2015 is in the same range as the study of Kreuger (1998) with 0.32-0.44%, the value of 2016 is in the upper range of general pesticide export of 1-5% of the applied amount due to the extreme rainfall event on 4 September 2016 (Imfeld et al 2013;Gassmann et al 2015). Due to the high metazachlor export, less metazachlor was available for transformation processes.…”

Section: Stream Watermentioning

confidence: 93%

Omnipresent distribution of herbicides and their transformation products in all water body types of an agricultural landscape in the North German Lowland

Ulrich

Pfannerstill

Ostendorp³

et al. 2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

The research of the environmental fate of pesticides has demonstrated that applied compounds are altered in their molecular structure over time and are distributed within the environment. To assess the risk for contamination by transformation products (TP) of the herbicides flufenacet and metazachlor, the following four water body types were sampled in a small-scale catchment of 50 km2 in 2015/2016: tile drainage water, stream water, shallow groundwater, and drinking water of private wells. The TP were omnipresent in every type of water body, more frequently and in concentrations up to 10 times higher than their parent compounds. Especially metazachlor sulfonic acid, metazachlor oxalic acid, and flufenacet oxalic acid were detected in almost every drainage and stream sample. The transformation process leads to more mobile and more persistent molecules resulting in higher detection frequencies and concentrations, which can even occur a year or more after the application of the parent compound. The vulnerability of shallow groundwater and private drinking water wells to leaching compounds is proved by numerous positives of metazachlor-TP with maximum concentrations of 0.7 μg L−1 (drinking water) and 20 μg L−1 (shallow groundwater) of metazachlor sulfonic acid. Rainfall events during the application period cause high discharge of the parent compound and lower release of TP. Later rainfall events lead to high displacement of TP. For an integrated risk assessment of water bodies, the environmental behavior of pesticide-TP has to be included into regular state-of-the-art water quality monitoring.

show abstract

Section: Stream Watermentioning

confidence: 93%

Omnipresent distribution of herbicides and their transformation products in all water body types of an agricultural landscape in the North German Lowland

Ulrich

Pfannerstill

Ostendorp³

et al. 2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…As a result, rainfall stochasticity as well as the temporal and spatial variability of dissipation rates and pathways critically control episodic export. This should be taken into account when using numerical models to predict the export of synthetic pesticides at the catchment scale (Basu et al, 2011;Gassmann et al, 2013;Gassmann et al, 2015).…”

Section: Export Of Synthetic Pesticides and Impact Of Rainfall Characteristicsmentioning

confidence: 99%

“…The role of small headwater catchments in pesticide export is important since they proportionally receive larger pesticide inputs than downstream areas (Lorenz et al, 2017). Dynamics of pesticide export in small headwater catchments are discontinuous and difficult to predict because they depend on rainfall characteristics, the pesticide application timing and seasonal variations of pesticide stocks in the catchment soil (Leu et al, 2005;Coupe et al, 2012;Lefrancq et al, 2017;Gassmann et al, 2015). There are two major difficulties when evaluating the influence of rainfall characteristics on pesticide export while limiting the influence of other confounding variables.…”

Section: Introductionmentioning

confidence: 99%

Do rainfall characteristics affect the export of copper, zinc and synthetic pesticides in surface runoff from headwater catchments?

Imfeld

Meite

Wiegert

et al. 2020

Science of The Total Environment

View full text Add to dashboard Cite

Rainfall and runoff characteristics may influence off-site export of pesticides into downstream aquatic ecosystems. However, the relationship between rainfall characteristics and pesticide export from small headwater catchments remains elusive due to confounding factors including the application dose and timing and the variation of pesticide stocks in soil. Here we examined the impact of rainfall characteristics on the export of copper (Cu), zinc (Zn) and 12 legacy and currently used synthetic pesticides in surface runoff from a headwater vineyard catchment. Cluster analysis of rainfall intensity, depth and duration of 78 events revealed four distinct rainfall categories, i.e., Small, Long, Moderate and Intense (p<0.001). Event mean concentrations of pesticides did not differ among rainfall categories (p>0.05). In contrast, event loads of both dissolved and solid-bound Cu and Zn significantly differed among rainfall categories (p<0.001). Rainfall depth and intensity significantly correlated with both Cu and Zn loads in runoff (ρ s = 0.33 to 0.92, p<0.002), and might be the main drivers of Cu and Zn export at the catchment scale. In contrast, rainfall depth, intensity or duration did not influence the loads of synthetic pesticides in runoff, even when weekly variations of pesticide stocks in the soil were accounted for. However, intense rainfall-runoff events, that can fragment soil, may control the export of persistent and hydrophobic legacy pesticides stocks in the soil, such as simazine and tetraconazole. Our results emphasise that rainfall characteristics controlled the off-site export of Cu, Zn and legacy synthetic pesticides in a small headwater catchment, whereas the application timing drove the export of currently used synthetic pesticides in runoff. We anticipate our results to be a preliminary step to forecast the influence of regional rainfall patterns on the export of both metallic and synthetic pesticides by surface runoff from small headwater catchments.

show abstract

“…Keith Beven showed the relevance in a study at the Gårdsjön catchment in Sweden applying and testing the new MIP model (Davies et al, ). But also other recent modeling studies clearly indicated the relevance of macropore flow to predict the chemograph in streamflow, for example a study focusing on pesticides and their transformation product in a highly instrumented watershed in Switzerland where artificial tracer experiments using labeled pesticides were conducted (Gassmann, Olsson, Stamm, Weiler, & Kümmerer, , ). Similar results have been derived in many watersheds by observing tracer response and stable water isotopes (e.g., McDonnell, ).…”

Section: Preferential Flow Modeling In a Post‐beven Worldmentioning

confidence: 98%

Macropores and preferential flow—a love‐hate relationship

Weiler

2016

Hydrological Processes

View full text Add to dashboard Cite

Preferential flow is of high relevance for runoff generation, transport of chemicals and nutrients, and the transit time distribution of water in the soil or watershed. However, preferential flow effects are generally ignored in lumped hydrological models. And even most physically-based models ignore macropores and preferential flow features at the soil and hillslope scale. KeithBeven was never satisfied with this situation and he tried again and again to convince the scientific community to focus their research on the complex topic of macropore and preferential flow.Although he recognized how difficult it is to correctly include preferential flow in hydrological models, he made substantial progress defining and describing macropore flow and showing its relevance, developing models to simulate preferential flow, and in particular, the interaction between macropores and the soil matrix. In this short commentary, I reflect on these achievements and outline a vision for research in preferential flow experiments and modeling.

show abstract

Physico-chemical characteristics affect the spatial distribution of pesticide and transformation product loss to an agricultural brook

Cited by 22 publications

References 45 publications

Omnipresent distribution of herbicides and their transformation products in all water body types of an agricultural landscape in the North German Lowland

Omnipresent distribution of herbicides and their transformation products in all water body types of an agricultural landscape in the North German Lowland

Do rainfall characteristics affect the export of copper, zinc and synthetic pesticides in surface runoff from headwater catchments?

Macropores and preferential flow—a love‐hate relationship

Contact Info

Product

Resources

About