Title

Long-term simulation of decreased acid loading on forested watershed

Document Type

Article

Peer Reviewed

1

Publication Date

1-1-1994

Journal/Book/Conference Title

Journal of Environmental Engineering

DOI of Published Version

10.1061/(ASCE)0733-9372(1994)120:2(291)

Start Page

291

End Page

312

Abstract

The response of a northeastern U.S. hardwood forest to wet and dry deposition of hydrogen ion and sulfate deposition was performed using the hydrobiogeochemical, lumped-parameter Terrestrial Aquatic Model for Ecosystems (TAME). Results of model calibration and output stream chemistry show that ion-exchange and mineral dissolution processes in the B and C horizons buffer the acidic, ambient atmospheric deposition [864 eq-SO4-2/(ha/yr) and 718 eq-H+/(ha/yr)] in this hydrologically tight and flashy watershed. Watershed response to a 50% decrease in total deposition of acidity over twenty years indicates that the watershed is linear with respect to sulfate (50% decrease in mass outflow) but less responsive with respect to acid neutralizing capacity, ANC (11% increase in stream volume-weighted average ANC concentrations). Only moderate improvements in ANC can be expected from emission controls and decreased sulfate deposition.

Published Article/Book Citation

Journal of Environmental Engineering, 120:2 (1994) pp.291-312.

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URL

https://ir.uiowa.edu/cee_pubs/241