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.
Depressional Storage on Tilled Soil Surfaces
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Transactions of the ASAE. 27 (3): 0729-0732. (doi: 10.13031/2013.32861) @1984
Authors: C. A. Onstad
ABSTRACT DEPRESSIONAL storage volumes were calculated from microrelief data for over 1000 plots. Equations were developed relating depressional storage volume and surface area of the filled depressions to slope steepness and random roughness. It was found that runoff begins before depressional storage is completely satisfied. As a result, the amount of precipitation excess needed to fill depressions is larger than the depressional volume. A relation was developed for that quantity of precipitation excess as related to slope steepness and random roughness. Data are shown also demonstrating the effect of slope steepness and random roughness on the fraction of the soil surface contributing to runoff as a function of the fraction of precipitation excess needed to satisfy depressional storage.(Download PDF) (Export to EndNotes)