Skip to main content

Variations in pesticide leaching related to land use, pesticide properties, and unsaturated zone thickness

Dates

Year
2008

Citation

Webb, Richard M T, Wieczorek, Michael E, Nolan, Bernard T, Hancock, Tracy C, Sandstrom, Mark W, Barbash, Jack E, Bayless, E Randall, Healy, Richard W, and Linard, Joshua, 2008, Variations in pesticide leaching related to land use, pesticide properties, and unsaturated zone thickness: Journal of environmental quality, v. 37, iss. 3, p. 1145-1157.

Summary

Pesticide leaching through variably thick soils beneath agricultural fields in Morgan Creek, Maryland was simulated for water years 1995 to 2004 using LEACHM (Leaching Estimation and Chemistry Model). Fifteen individual models were constructed to simulate five depths and three crop rotations with associated pesticide applications. Unsaturated zone thickness averaged 4.7 m but reached a maximum of 18.7 m. Average annual recharge to ground water decreased from 15.9 to 11.1 cm as the unsaturated zone increased in thickness from 1 to 10 m. These point estimates of recharge are at the lower end of previously published values, which used methods that integrate over larger areas capturing focused recharge in the numerous detention ponds in [...]

Contacts

Attached Files

Communities

  • USGS National Research Program

Tags

Provenance

Added to ScienceBase on Thu Apr 18 09:13:00 MDT 2013 by processing file <b>Field Applications of Unsaturated Zone Flow Theory.xml</b> in item <a href="https://www.sciencebase.gov/catalog/item/51118b5fe4b0361176563a11">https://www.sciencebase.gov/catalog/item/51118b5fe4b0361176563a11</a>

Additional Information

Identifiers

Type Scheme Key
DOI http://sciencebase.gov/vocab/identifierScheme 10.2134/jeq2007.0245

Citation Extension

citationTypeJournal Article
journalJournal of environmental quality
parts
typePages
value1145-1157
typeVolume
value37
typeIssue
value3

Item Actions

View Item as ...

Save Item as ...

View Item...