HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Gaskin, J. W. Articles by Swank, W. T. Search for Related Content PubMed Articles by Gaskin, J. W. Articles by Swank, W. T. Agricola Articles by Gaskin, J. W. Articles by Swank, W. T.

Vertical and Lateral Components of Soil Nutrient Flux in a Hillslope

School of Forest Resources, Univ. of Georgia, Athens, GA 30602;

W. T. Swank

Coweeta Hydrologic Lab., 999 Coweeta Lab Rd, Otto, NC 28763.

^* Corresponding author.

ABSTRACT

The vertical and lateral components of chemical flux during storm events were investigated in a Typic Hapludult to assess their importance in understanding the effects of atmospheric deposition on hillslope sites. Vertical and lateral water flux were calculated from soil water potential data and hydraulic conductivity curves. Throughfall, stemflow, forest floor leachate, and soil solution from the BA, Bt, and BC horizons were sampled and analyzed for SO₄, NO₃-N, Cl, HCO₃, H, K, Ca, Mg, and Na. Total lateral flow as a ratio of total vertical flow averaged 0.23 and 0.30 in the A and BA horizons, respectively, indicating lateral fluxes were an important path of nutrient movement in the surface horizons. The highest lateral flow occurred in the A horizon during dry antecedent moisture conditions and in the BA horizon during wet antecedent moisture conditions. Fluxes of all ions except HCO₃, NO₃-N, and H peaked in the forest floor leachate and the BA soil solution, then decreased with depth. Decreases of SO₄ flux between the BA and BC horizons could not be explained by the lag of solute movement or by lateral solute losses, demonstrating the system was an effective SO₄ sink.

This article has been cited by other articles:

				G. Kahl, J. Ingwersen, P. Nutniyom, S. Totrakool, K. Pansombat, P. Thavornyutikarn, and T. Streck Micro-Trench Experiments on Interflow and Lateral Pesticide Transport in a Sloped Soil in Northern Thailand J. Environ. Qual., June 27, 2007; 36(4): 1205 - 1216. [Abstract] [Full Text] [PDF]