Soil compressibility in transient unsaturated seepage analyses

Timothy D. Stark, Navid H. Jafari, Aaron L. Leopold, Thomas L. Brandon

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Most levee underseepage and uplift analyses are based on steady-state seepage and can yield conservative results. Although computations are simpler and steady-state seepage parameters are easier to determine and readily available, transient and unsaturated seepage analyses are more representative of levee seepage conditions. Transient seepage analyses using a case study floodwall indicate that as soil compressibility of the underseepage layer decreases, rapid landside pore-water pressures increase and can approach steady-state values. The transient results for this case study also indicate that uplift factor safety during the flood event are about 25% higher than steady-state. The effect of soil compressibility can delay or accelerate the onset of uplift water pressure increase from the initial steady-state conditions.

Original languageEnglish (US)
Title of host publicationIFCEE 2015 - Proceedings of the International Foundations Congress and Equipment Expo 2015
EditorsJ. Brian Anderson, Magued Iskander, Muhannad T. Suleiman, Debra F. Laefer
PublisherAmerican Society of Civil Engineers
Number of pages15
ISBN (Electronic)9780784479087
StatePublished - 2015
EventInternational Foundations Congress and Equipment Expo 2015, IFCEE 2015 - San Antonio, United States
Duration: Mar 17 2015Mar 21 2015

Publication series

NameGeotechnical Special Publication
VolumeGSP 256
ISSN (Print)0895-0563


OtherInternational Foundations Congress and Equipment Expo 2015, IFCEE 2015
Country/TerritoryUnited States
CitySan Antonio

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


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