Abstract
The initial soil moisture content affects the water flow and solute transport through the vadose zone, but researchers are in disagreement about the extent and nature of its effects. Better understanding of the initial moisture effect on the water movement will help to prevent groundwater contamination and increase crop production by improving the efficiency of water use in irrigation practice. Therefore, in this study, the effect of the initial moisture content on the spatial distribution of the water retention was investigated in the field. A total of 4 cm of water was applied to duplicate plots with each of three initial moisture conditions within 2 h using a rainfall simulator. Following the application and a 2-h redistribution period, 100 soil samples were taken from different depths of each plot using a grid sampling system to be analyzed for their gravimetric water content in the laboratory. Statistical and geostatistical analyses were performed to analyze the spatial structure of the collected data. The results showed that the preferential flow was more evident in the case of the dry initial soil water content than for the two wetter initial conditions. Both the classical and geostatistical analyses supported that the overall water retention was uniformly distributed throughout the profile except at 20–30 cm, where the coefficient of variation and the percent nugget to total semivariance ratio were high, indicating some degree of preferential flow through large pores (macropores). These results suggest that similar studies should be conducted on different field soils under more different initial moisture conditions so that the effect of the macropores on the water flow and chemical transport can be better understood.
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References
M. S. Andreini and T. S. Steenhuis, “Preferential Paths of Flow under Conventional and Conservation Tillage,” Geoderma 46, 85–102 (1990).
K. Beven and P. Germann, “Macropores and Water Flow in Soils,” Water Resour. Res. 18, 1311–1325 (1982).
J. Birkholzer and C. Tsang, “Solute Channeling in Unsaturated Heterogeneous Porous Media,” Water Resour. Res. 33, 2221–2238 (1997).
J. Bouma, “Using Morphometric Expressions for Macropores to Improve Soil Physical Analyses of Field Soils,” Geoderma 46, 3–11 (1990).
C. A. Cambardella, T. B. Moorman, J. M. Novak, et al., “Field-Scale Variability of Soil Properties in Central Iowa Soils,” Soil Sci. Soc. Am. J. 58, 1501–1511 (1994).
W. M. Edwards, M. J. Shipitalo, W. A. Dick, and L. B. Owens, “Rainfall Intensity Affects Transport of Water and Chemicals through Macropores in No-Till Soil,” Soil Sci. Soc. Am. J. 56, 52–58 (1992).
M. Flury, H. Fluhler, W. A. Jury, and J. Leuenberger, “Susceptibility of Soils to Preferential Flow of Water: A Field Study,” Water Resour. Res. 30, 1945–1954 (1994).
M. Flury, J. Leuenberger, B. Studer, and H. Fluhler, “Transport of Anions and Herbicides in a Loamy and Sandy Field Soil,” Water Resour. Res. 31, 823–835 (1995).
W. A. Jury, Vadose Zone Modeling of Organic Pollutants (Lewis, Chelsea, MI, 1986).
K. J. S. Kung, T. S. Steenhuis, E. J. Kladivko, et al., “Impact of Preferential Flow on the Transport of Adsorbing and Non-Adsorbing Tracers,” Soil Sci. Soc. Am. J. 64, 1290–1296 (2000).
K. J. S. Kung, E. J. Kladivko, T. J. Gish, et al., “Quantifying Preferential Flow by Breakthrough of Sequentially Applied Tracers: Silt Loam Soil,” Soil Sci. Soc. Am. J. 64, 1296–1304 (2000).
V. L. Quisenberry and R. E. Philips, “Percolation of Surface Applied Water in the Field,” Soil Sci. Soc. Am. J. 40, 484–489 (1976).
M. J. Shipitalo, W. M. Edwards, W. A. Dick, and L. B. Owens, “Initial Storm Effects on Macropore Transport of Surface-Applied Chemicals in No-Till Soil,” Soil Sci. Soc. Am. J. 54, 1530–1536 (1990).
M. J. Shipitalo and W. M. Edwards, “Effects of Initial Water Content on Macropore/Matrix Flow and Transport of Surface-Applied Chemicals,” J. Environ. Qual. 25, 662–670 (1996).
B. B. Trangmar, R. S. Yost, and G. Uehara, “Application of Geostatistics to Spatial Studies of Soil Properties,” Adv. Agron. 38, 45–94 (1985).
T. Tsegaye and R. L. Hill, “Intensive Tillage Effects on Spatial Variability of Soil Physical Properties,” Soil Sci. 163, 143–165 (1998).
R. E. White, “The Influences of Macropores on the Transport of Dissolved and Suspended Matter through Soil,” Adv. Soil Sci. 3, 95–120 (1985).
E. G. Youngs and P. B. Leeds-Harrison, “Aspects of Transport Processes in Aggregated Soils,” Soil Sci. 41, 665–675 (1990).
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Published in Russian in Pochvovedenie, 2008, No. 10, pp. 1241–1249.
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Merdun, H., Meral, R. & Riza Demirkiran, A. Effect of the initial soil moisture content on the spatial distribution of the water retention. Eurasian Soil Sc. 41, 1098–1106 (2008). https://doi.org/10.1134/S1064229308100128
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DOI: https://doi.org/10.1134/S1064229308100128