Document Type

Thesis - Open Access

Award Date

1986

Degree Name

Master of Science (MS)

Department

Agricultural Engineering

First Advisor

Darrell W. DeBoer

Abstract

A modified Green-Ampt infiltration model was used to determine soil hydraulic conductivity values from surface runoff and sprinkler application data sets. Comparison of three sprinklers and two secondary tillage practices over three irrigation seasons were made to identify the effect of these factors on hydraulic conductivity. Hydraulic conductivity values were different for the low, medium and high-pressure sprinklers used in the study with the hydraulic conductivity values varying inversely with the pressure. Hydraulic conductivities also varied among the years of the study. A ripping (subsoiling) secondary tillage practice increased hydraulic conductivity by the 66 percent when compared with a control practice. Hydraulic conductivities generally decreased during the irrigation season. A calibrated infiltration model was used to predict the surface runoff values for irrigation application depths not used in the data sets.

Library of Congress Subject Headings

Sprinkler irrigation
Soil permeability
Tillage
Irrigation -- Research

Format

application/pdf

Number of Pages

138

Publisher

South Dakota State University

Rights

No Copyright - United State
http://rightsstatements.org/vocab/NoC-US/1.0/

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