Field method for separating the contribution of surface‐connected preferential flow pathways from flow through the soil matrix

[1] Liquid latex was used as a method to seal visible surface-connected preferential flow pathways (PFPs) in the field in an effort to block large surface-connected preferential flow and force water to move through the soil matrix. The proposed approach allows for the quantification of the contribution of large surface-connected cracks and biological pores to infiltration at various soil moisture states. Experiments were conducted in a silty clay loam soil in a field under a no-till corn-soybean rotation planted to corn. Surface intake rates under ponding were measured using a simplified falling head technique under two scenarios: (1) natural soil conditions with unaltered PFPs and (2) similar soil conditions with latex-sealed large macropores at the surface. Results indicated that the contribution of flow from large surface-connected macropores to overall surface intake rates varied from approximately 34% to 99% depending on the initial moisture content and macroporosity present. However, evidence of preferential flow continued to appear in latex-sealed plots, suggesting significant contributions to preferential flow from smaller structural macropores, particularly in two out of four tests where no significant differences were observed between control and latex-sealed plots. Citation: Sanders, E. C., M. R. Abou Najm, R. H. Mohtar, E. Kladivko, and D. Schulze (2012), Field method for separating the contribution of surface-connected preferential flow pathways from flow through the soil matrix, Water Resour. Res., 48, W04534,

[1]  Carl Olof Tamm,et al.  A New Method for the Study of Water Movement in Soil , 1957 .

[2]  Tammo S. Steenhuis,et al.  Quantifying Preferential Flow by Breakthrough of Sequentially Applied Tracers Silt Loam Soil , 2000 .

[3]  Christina Bogner,et al.  Analysing flow patterns from dye tracer experiments in a forest soil using extreme value statistics , 2007 .

[4]  Martin J. Shipitalo,et al.  Effects of Initial Water Content on Macropore/Matrix Flow and Transport of Surface‐Applied Chemicals , 1996 .

[5]  J. Moncrief,et al.  Role of macropore continuity and tortuosity on solute transport in soils: 1. Effects of initial and boundary conditions. , 2002, Journal of contaminant hydrology.

[6]  Kazuhide Adachi,et al.  Numerical analysis of crack generation in saturated deformable soil under row-planted vegetation , 2004 .

[7]  Robert S. Freeland,et al.  Mapping shallow underground features that influence site-specific agricultural production , 1998 .

[8]  Emily Christine Sanders.  Characterizing flow through the soil matrix and preferential flow pathways (PFPs) , 2010 .

[9]  Shoji Noguchi,et al.  Morphological Characteristics of Macropores and the Distribution of Preferential Flow Pathways in a Forested Slope Segment , 1999 .

[10]  J. D. Eigel,et al.  Pesticide and Nitrate Transport into Subsurface Tile Drains of Different Spacings , 1999 .

[11]  Rabi H. Mohtar,et al.  New method for the characterization of three‐dimensional preferential flow paths in the field , 2010 .

[12]  Rattan Lal,et al.  Axle load and tillage effects on the shrinkage characteristics of a Mollic Ochraqualf in northwest Ohio , 1999 .

[13]  Nicholas M. Holden,et al.  Preferential flow variability in a well-structured soil. , 2003 .

[14]  Jianhang Lu,et al.  Visualizing bromide and iodide water tracer in soil profiles by spray methods. , 2003, Journal of environmental quality.

[15]  Keith Beven,et al.  WATER FLOW IN SOIL MACROPORES I. AN EXPERIMENTAL APPROACH , 1981 .

[16]  R. J. Luxmoore,et al.  On preferential flow and its measurement , 1991 .

[17]  C. D. Brown,et al.  Investigation into the effect of tillage on solute movement to drains through a heavy clay soil , 1999 .

[18]  Marnik Vanclooster,et al.  Monitoring Solute Transport in a Multi-Layered Sandy Lysimeter using Time Domain Reflectometry , 1995 .

[19]  Hannes Flühler,et al.  Quantifying dye tracers in soil profiles by image processing , 2000 .

[20]  J. Moncrief,et al.  Role of macropore continuity and tortuosity on solute transport in soils: 2. Interactions with model assumptions for macropore description. , 2002, Journal of contaminant hydrology.

[21]  Laura C. Bowling,et al.  Automated Identification of Tile Lines from Remotely Sensed Data , 2008 .

[22]  Ole H. Jacobsen,et al.  Time Domain Reflectometry Coil Probe Measurements of Water Content during Fingered Flow , 1999 .

[23]  D. Arnold,et al.  Investigation into the effect of tillage on solute movement to drains through a heavy clay soil. II. Interpretation using a radio-scanning technique, dye-tracing and modelling , 2006 .

[24]  G. Bouyoucos.  Hydrometer Method Improved for Making Particle Size Analyses of Soils1 , 1962 .

[25]  William A. Jury,et al.  A Field Study Using Dyes to Characterize Preferential Flow of Water , 1990 .

[26]  Peter F. Germann,et al.  Rivulet Approach to Rates of Preferential Infiltration , 2007 .

[27]  William A. Jury,et al.  Simulation of solute transport using a transfer function model , 1982 .

[28]  George Vellidis,et al.  Detecting wetting front movement in a sandy soil with ground-penetrating radar , 1990 .

[29]  H. O. Hill,et al.  A Study of the Shrinking and Swelling Properties of Rendzina Soils , 1945 .