Water balance calculations were conducted for data obtained from a soil moisture characteristic to demonstrate the effect of different subsurface drain depths on the extent of droughtiness of a sandy soil. / Laboratory experiments were conducted on samples of sandy soils of the St. Lawrence lowlands to determine pertinent physical and soil-water properties. These properties were used, together with published crop data, to determine the effect of different subsurface drain depths on the quantity of available water in the soils studied. / Empirical relationships were derived among some of the properties measured, with the objective of enabling future drainage planners to make preliminary assessments of the likelihood of the occurrence of excessive drainage in a particular soil. / Based on information gained from this study, subsurface drainage-problem cases, representing conditions similar to those existing in the fields studied, were analysed and designs or design improvements were suggested for minimising the problem exemplified in each case.

Thesis (M.S. - Mining and Geological Engineering)--University of Arizona. / Includes bibliographical references (leaves 149-150).

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 102-105). Also available via the Internet.

Thesis (M.S.)--Ohio University, August, 1994. / Title from PDF t.p.

Thesis (Ph. D.)--Auburn University, 2009. / Abstract. Vita. Includes bibliographical references (p. 107-120).

Thesis (M.S. in civil engineering)--Washington State University, May 2009. / Title from PDF title page (viewed on July 27, 2009). "Department of Civil and Environmental Engineering." Includes bibliographical references (p. 82-84).

Thesis (Ph. D.)--University of Washington, 1995. / Vita. Includes bibliographical references (leaves [256]-272).

Thesis (Ph. D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2006. / Dr. Spyros Pavlostathis, Committee Member ; Dr. Mustafa M. Aral, Committee Chair ; Dr. Turgay Uzer, Committee Member ; Dr. Ching-Hua Huang, Committee Member ; Dr. Sotira Yiacoumi, Committee Member. Vita. Includes bibliographical references.

Thesis (M.S.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 38-40). Also available on the World Wide Web.

Thesis (Ph. D.)--University of Missouri-Columbia, 2000. / Typescript. Vita. Includes bibliographical references (leaves [135]-139). Also available on the Internet.