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

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (13) Citing Articles via Google Scholar Google Scholar Articles by de Rooij, G. H. Articles by Stagnitti, F. Search for Related Content PubMed Articles by de Rooij, G. H. Articles by Stagnitti, F. GeoRef GeoRef Citation Agricola Articles by de Rooij, G. H. Articles by Stagnitti, F.

DIVISION S-1-SOIL PHYSICS

Spatial Variability of Solute Leaching

Experimental Validation of a Quantitative Parameterization

^a Wageningen Univ., Dep. of Environmental Sci., Sub-dep. Water Resour., Nieuwe Kanaal 11, 6709 PA Wageningen, The Netherlands
^b Deakin Univ., School of Ecology and Environ., Center for Applied Dynamical Systems and Environmental Modelling, P.O. Box 423, Warrnambool Victoria, Australia 3280

ger.derooij{at}users.whh.wau.nl

Soil heterogeneity, soil structure, and fingered flow affect solute leaching from the vadose zone to the ground water. Recently, the spatial variation of cumulative solute fluxes at a given depth was characterized by fitting the two-parameter beta distribution to sorted amounts of solute leaching at different sampling points. We tested this parameterization on data from a chloride tracer experiment performed on a monolith lysimeter, below which drainage was collected from 300 compartments with a combined area of 0.75 m². The effect of total sampling area, sample size, and the number of samples and their spatial distribution (random locations vs. clustered) on the fitted parameters was examined. Sixteen or more sampling locations of 25 cm² each (5% of the total area) resulted in adequate representation of parameter values. Increasing the sample size underestimated the degree of heterogeneity. We therefore recommend that the fitted parameter values of the beta distribution be reported together with the sample size. In solute-transport experiments, collecting many small samples will give more accurate results than taking fewer but larger samples.

Abbreviations: cdf, cumulative distribution function • EC, electrical conductivity • HI, heterogeneity index

This article has been cited by other articles:

				G. H. de Rooij, O. A. Cirpka, F. Stagnitti, S. H. Vuurens, and J. Boll Quantifying Minimum Monolith Size and Solute Dilution from Multi-Compartment Percolation Sampler Data Vadose Zone J., October 3, 2006; 5(4): 1086 - 1092. [Abstract] [Full Text] [PDF]

				D. L. Corwin, J. Hopmans, and G. H. de Rooij From Field- to Landscape-Scale Vadose Zone Processes: Scale Issues, Modeling, and Monitoring Vadose Zone J., March 8, 2006; 5(1): 129 - 139. [Abstract] [Full Text] [PDF]

				U. Buczko and H. H. Gerke Modeling Two-Dimensional Water Flow and Bromide Transport in a Heterogeneous Lignitic Mine Soil Vadose Zone J., December 16, 2005; 5(1): 14 - 26. [Abstract] [Full Text] [PDF]

				J. S. Strock, D. K. Cassel, and M. L. Gumpertz Spatial Variability of Water and Bromide Transport Through Variably Saturated Soil Blocks Soil Sci. Soc. Am. J., November 1, 2001; 65(6): 1607 - 1617. [Abstract] [Full Text] [PDF]