Effect of soil hydraulic conductivity on slope stability at a hillslope of weathered granitic soil formation

Muhammad Mukhlisin, Mohd. Raihan Taha

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

Abstract

Modeling rainwater infiltration in slopes is vital to the analysis of slope failure induced by heavy rainfall. In this study, a numerical model was developed to estimate the effect of soil hydraulic conductivity on an unsaturated slope, the formation of a saturated zone, and the change in slope stability under weak rainfall and rainstorm events. In general, the increase in pore-water pressure in high hydraulic conductivity soil slopes are faster than low hydraulic conductivity slopes leading to more rapid decrease in safety factor in high hydraulic conductivity soil slopes. Under weak rainfall event, the discharge and the pore-water pressure increased earliest for highest hydraulic conductivity soil because the surface layer have the greatest amount of water flow in the soil slope. However, under a rainstorm event, the magnitude of pore-water pressure is greater in low hydraulic conductivity soil slopes compared to slopes in high hydraulic conductivity soils. Therefore, the magnitude of safety factor for slope soil with low hydraulic conductivity is also smaller as compared with that in high hydraulic conductivity slope soil. This is due to greater amount and longer retention period of water in low hydraulic conductivity soils during the storm event.

Original languageEnglish
Title of host publicationUnsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils
Pages811-816
Number of pages6
Publication statusPublished - 2010
Event4th Asia Pacific Conference on Unsaturated Soils - Newcastle, NSW
Duration: 23 Nov 200925 Nov 2009

Other

Other4th Asia Pacific Conference on Unsaturated Soils
CityNewcastle, NSW
Period23/11/0925/11/09

Fingerprint

soil formation
slope stability
hillslope
hydraulic conductivity
soil
rain
porewater
safety factor
rainstorm
rainfall
water
effect
safety
soil surface layers
phreatic zone
slope failure
rainwater
water flow
infiltration (hydrology)
surface layer

ASJC Scopus subject areas

  • Soil Science

Cite this

Mukhlisin, M., & Taha, M. R. (2010). Effect of soil hydraulic conductivity on slope stability at a hillslope of weathered granitic soil formation. In Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils (pp. 811-816)

Effect of soil hydraulic conductivity on slope stability at a hillslope of weathered granitic soil formation. / Mukhlisin, Muhammad; Taha, Mohd. Raihan.

Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils. 2010. p. 811-816.

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

Mukhlisin, M & Taha, MR 2010, Effect of soil hydraulic conductivity on slope stability at a hillslope of weathered granitic soil formation. in Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils. pp. 811-816, 4th Asia Pacific Conference on Unsaturated Soils, Newcastle, NSW, 23/11/09.
Mukhlisin M, Taha MR. Effect of soil hydraulic conductivity on slope stability at a hillslope of weathered granitic soil formation. In Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils. 2010. p. 811-816
Mukhlisin, Muhammad ; Taha, Mohd. Raihan. / Effect of soil hydraulic conductivity on slope stability at a hillslope of weathered granitic soil formation. Unsaturated Soils: Theoretical and Numerical Advances in Unsaturated Soil Mechanics - Proceedings of the 4th Asia Pacific Conference on Unsaturated Soils. 2010. pp. 811-816
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