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Simulation of stream discharge and transport of nitrate and selected herbicides in the Mississippi River Basin

Hydrological Processes

By:
, , and
DOI: 10.1002/hyp.208

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Abstract

Stream discharge and the transport of nitrate, atrazine, and metolachlor in the Mississippi River Basin were simulated using the DAFLOW/BLTM hydrologic model. The simulated domain for stream discharge included river reaches downstream from the following stations in the National Stream Quality Accounting Network: Mississippi River at Clinton, IA; Missouri River at Hermann, MO: Ohio River at Grand Chain, IL: And Arkansas River at Little Rock, AR. Coefficients of hydraulic geometry were calibrated using data from water year 1996; the model was validated by favourable simulation of observed discharges in water years 1992-1994. The transport of nitrate, atrazine, and metolachlor was simulated downstream from the Mississippi River at Thebes, IL, and the Ohio River at Grand Chain. Simulated concentrations compared favourably with observed concentrations at Baton Rouge, LA. Development of this model is a preliminary step in gaining a more quantitative understanding of the sources and fate of nutrients and pesticides delivered from the Mississippi River Basin to the Gulf of Mexico.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Simulation of stream discharge and transport of nitrate and selected herbicides in the Mississippi River Basin
Series title:
Hydrological Processes
DOI:
10.1002/hyp.208
Volume
15
Issue:
7
Year Published:
2001
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Hydrological Processes
First page:
1157
Last page:
1167