Thesis - Open Access
Master of Science (MS)
Numerical regression analysis of hydraulic conductivities and soil water characteristics was used to fit the water management model DRAINMOD to electrical pressure transducer measurements and model estimates of water table depth for a slowly permeable soil. Regression analysis of soil properties can replace the need for extensive field and laboratory analysis of soil properties used in the model. The method allows the water management model to be applied to drainage and sub irrigation system cost/benefit projections more quickly than when using conventional analytical approaches to input parameter determination. The objectives of the research were to evaluate the use of a model fitting technique and DRAINMOD to characterize a slowly permeable soil. accomplish this were: Specific steps to 1. Design and construct a lysimeter similar to a section of a drained/subirrigated field with transiometer instrumentation in place. 2. Measure and analytically estimate DRAINMOD soil property parameters by conventional procedures. 3. Use water table measurements and DRAINMOD to estimate soil property parameters by model fitting techniques. 4. Compare soil parameter estimates derived from DRAINMOD and conventional procedures.
Library of Congress Subject Headings
Number of Pages
South Dakota State University
Steele, Dean D., "Using Drainmod to Estimate Hydraulic Parameters in Slowly Permeable Soils" (1987). Electronic Theses and Dissertations. 4484.