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Preferred Movement of Nonadsorbed Chemicals on Wet, Shallow, Sloping Soils
Author(s) -
Steenhuis Tammo S.,
Muck Richard E.
Publication year - 1988
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1988.00472425001700030006x
Subject(s) - interflow , surface runoff , nitrate , soil water , chloride , environmental science , hydrology (agriculture) , surface water , water content , soil science , chemistry , geology , environmental engineering , geotechnical engineering , ecology , organic chemistry , biology
Preferred movement of chloride and nitrate during runoff events following nutrient application was studied experimentally on 109 m long fields with a hard pan at shallow depth near Ithaca, NY. Chloride and nitrate applications were surface‐applied and incorporated at 36 and 69 m uphill from the collection point. All of the applied chemicals, when surface‐applied on saturated soil, were completely lost in the surface runoff and interflow water. When incorporated, at most 60% of the mass applied was lost. The fraction lost appeared to be related to the initial moisture content of the soil. After a chemical application, the concentration in both runoff and interflow was initially high and then decreased exponentially. The concentrations in the runoff water, interflow, and macropores were approximately equal throughout a runoff event.