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Click on “Download PDF” for the PDF version or on the title for the HTML version. If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options. Prediction of Soil Cracking and the Effect on Surface Runoff in a Texas Blackland Prairie WatershedPublished by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org Citation: Pp. 57-60 in Preferential Flow, Water Movement and Chemical Transport in the Environment, Proc. 2 nd Int. Symp. (3-5 January 2001, Honolulu, Hawaii, USA), eds. D. D. Bosch and K. W. King. St. Joseph, Michigan: ASAE. , Pub. Date 3 January 2001 701P0006.(doi:10.13031/2013.2079)Authors: J.G. Arnold, K.N. Potter, P.M. Allen, K.W. King Keywords: Crack measurement, hydrologic model, surface runoff Soil surface elevation changes were measured and soil crack volume calculated for a two-year period at the USDA-ARS Riesel Y-2 watershed in central Texas. Soil anchors were placed in triplicate at depths of 0.15, 0.45, 0.91, 1.52, and 2.44 m. A crack flow submodel was developed for this study and incorporated into SWAT, a comprehensive hydrologic model. The model computes crack volume from crack potential, soil depth and soil moisture. SWAT was run with and without the crack subroutine and in general, the model more accurately simulated the surface runoff process using the crack subroutine. (Download PDF) (Export to EndNotes)
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