Herbicide Persistence and Mobility in Recharge Lake Watershed in York, Nebraska
Abstract Elevated levels of herbicides in surface and groundwater are a concern in the Cornbelt in the USA. This study was conducted to interpret the herbicide behavior in a watershed system using data collected from runoff, Recharge Lake, and groundwater influenced by agriculture and lake seepage....
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crwiley:10.2134/jeq1997.00472425002600010018x 2023-12-03T10:20:13+01:00 Herbicide Persistence and Mobility in Recharge Lake Watershed in York, Nebraska Ma, L. Spalding, R. F. 1997 http://dx.doi.org/10.2134/jeq1997.00472425002600010018x https://onlinelibrary.wiley.com/doi/pdf/10.2134/jeq1997.00472425002600010018x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Environmental Quality volume 26, issue 1, page 115-125 ISSN 0047-2425 1537-2537 Management, Monitoring, Policy and Law Pollution Waste Management and Disposal Water Science and Technology Environmental Engineering journal-article 1997 crwiley https://doi.org/10.2134/jeq1997.00472425002600010018x 2023-11-09T13:23:33Z Abstract Elevated levels of herbicides in surface and groundwater are a concern in the Cornbelt in the USA. This study was conducted to interpret the herbicide behavior in a watershed system using data collected from runoff, Recharge Lake, and groundwater influenced by agriculture and lake seepage. The York Ground Water Recharge Project was constructed on a tributary of Beaver Creek, which drains a 3327‐ha watershed of primarily row‐cropped heavily irrigated farmland. The estimated average runoff is 1.48 × 10 6 m 3 yr −1 under a precipitation norm of 635 mm yr −1 . Maximum atrazine (2‐chloro‐4‐ethylamino‐6‐isopropylamino‐ s ‐triazine) inputs to Recharge Lake occurred in May and June runoff events and resulted in average lake concentrations of 36 and 17 µg L −1 in 1993 and 1994, respectively. Only about 0.28 and 0.19% of total applied atrazine was lost to runoff in 1993 and 1994, respectively. The deethylatrazine (DEA) to atrazine molar ratio (DAR) decreased rapidly over a period of several hours in runoff samples, which is consistent with inputs from recently atrazine‐treated soil. After the spring runoff, herbicide levels in Recharge Lake rose rapidly in response to the runoff event, then diminished gradually over a period of months. Atrazine concentrations in Recharge Lake decreased exponentially with time. Degradation half‐lives were 237 d ( r = 0.93) in 1993 and 209 d ( r = 0.91) in 1994. Adjusted DEA concentrations in Recharge Lake remained relatively constant, indicating little evidence for biotic degradation and suggesting that abiotic degradation of atrazine to hydroxyatrazine (2‐hydroxy‐4‐ethylamino‐6‐isopropylamino‐ s ‐triazine) was the most likely major degradative pathway in Recharge Lake. Article in Journal/Newspaper Beaver Creek Wiley Online Library (via Crossref) Journal of Environmental Quality 26 1 115 125 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Management, Monitoring, Policy and Law Pollution Waste Management and Disposal Water Science and Technology Environmental Engineering |
spellingShingle |
Management, Monitoring, Policy and Law Pollution Waste Management and Disposal Water Science and Technology Environmental Engineering Ma, L. Spalding, R. F. Herbicide Persistence and Mobility in Recharge Lake Watershed in York, Nebraska |
topic_facet |
Management, Monitoring, Policy and Law Pollution Waste Management and Disposal Water Science and Technology Environmental Engineering |
description |
Abstract Elevated levels of herbicides in surface and groundwater are a concern in the Cornbelt in the USA. This study was conducted to interpret the herbicide behavior in a watershed system using data collected from runoff, Recharge Lake, and groundwater influenced by agriculture and lake seepage. The York Ground Water Recharge Project was constructed on a tributary of Beaver Creek, which drains a 3327‐ha watershed of primarily row‐cropped heavily irrigated farmland. The estimated average runoff is 1.48 × 10 6 m 3 yr −1 under a precipitation norm of 635 mm yr −1 . Maximum atrazine (2‐chloro‐4‐ethylamino‐6‐isopropylamino‐ s ‐triazine) inputs to Recharge Lake occurred in May and June runoff events and resulted in average lake concentrations of 36 and 17 µg L −1 in 1993 and 1994, respectively. Only about 0.28 and 0.19% of total applied atrazine was lost to runoff in 1993 and 1994, respectively. The deethylatrazine (DEA) to atrazine molar ratio (DAR) decreased rapidly over a period of several hours in runoff samples, which is consistent with inputs from recently atrazine‐treated soil. After the spring runoff, herbicide levels in Recharge Lake rose rapidly in response to the runoff event, then diminished gradually over a period of months. Atrazine concentrations in Recharge Lake decreased exponentially with time. Degradation half‐lives were 237 d ( r = 0.93) in 1993 and 209 d ( r = 0.91) in 1994. Adjusted DEA concentrations in Recharge Lake remained relatively constant, indicating little evidence for biotic degradation and suggesting that abiotic degradation of atrazine to hydroxyatrazine (2‐hydroxy‐4‐ethylamino‐6‐isopropylamino‐ s ‐triazine) was the most likely major degradative pathway in Recharge Lake. |
format |
Article in Journal/Newspaper |
author |
Ma, L. Spalding, R. F. |
author_facet |
Ma, L. Spalding, R. F. |
author_sort |
Ma, L. |
title |
Herbicide Persistence and Mobility in Recharge Lake Watershed in York, Nebraska |
title_short |
Herbicide Persistence and Mobility in Recharge Lake Watershed in York, Nebraska |
title_full |
Herbicide Persistence and Mobility in Recharge Lake Watershed in York, Nebraska |
title_fullStr |
Herbicide Persistence and Mobility in Recharge Lake Watershed in York, Nebraska |
title_full_unstemmed |
Herbicide Persistence and Mobility in Recharge Lake Watershed in York, Nebraska |
title_sort |
herbicide persistence and mobility in recharge lake watershed in york, nebraska |
publisher |
Wiley |
publishDate |
1997 |
url |
http://dx.doi.org/10.2134/jeq1997.00472425002600010018x https://onlinelibrary.wiley.com/doi/pdf/10.2134/jeq1997.00472425002600010018x |
genre |
Beaver Creek |
genre_facet |
Beaver Creek |
op_source |
Journal of Environmental Quality volume 26, issue 1, page 115-125 ISSN 0047-2425 1537-2537 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2134/jeq1997.00472425002600010018x |
container_title |
Journal of Environmental Quality |
container_volume |
26 |
container_issue |
1 |
container_start_page |
115 |
op_container_end_page |
125 |
_version_ |
1784267644174598144 |