Fluid pressure responses for a Devil's Slide-like system: problem formulation and simulation

Hydrological Processes
By: , and 

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Abstract

This study employs a hydrogeologic simulation approach to investigate subsurface fluid pressures for a landslide-prone section of the central California, USA, coast known as Devil's Slide. Understanding the relative changes in subsurface fluid pressures is important for systems, such as Devil's Slide, where slope creep can be interrupted by episodic slip events. Surface mapping, exploratory core, tunnel excavation records, and dip meter data were leveraged to conceptualize the parameter space for three-dimensional (3D) Devil's Slide-like simulations. Field observations (i.e. seepage meter, water retention, and infiltration experiments; well records; and piezometric data) and groundwater flow simulation (i.e. one-dimensional vertical, transient, and variably saturated) were used to design the boundary conditions for 3D Devil's Slide-like problems. Twenty-four simulations of steady-state saturated subsurface flow were conducted in a concept-development mode. Recharge, heterogeneity, and anisotropy are shown to increase fluid pressures for failure-prone locations by up to 18.1, 4.5, and 1.8% respectively. Previous estimates of slope stability, driven by simple water balances, are significantly improved upon with the fluid pressures reported here. The results, for a Devil's Slide-like system, provide a foundation for future investigations

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Fluid pressure responses for a Devil's Slide-like system: problem formulation and simulation
Series title Hydrological Processes
DOI 10.1002/hyp.10267
Volume 29
Issue 6
Year Published 2015
Language English
Publisher Wiley
Publisher location Chichester, England
Contributing office(s) National Research Program - Western Branch
Description 16 p.
First page 1450
Last page 1465
Country United States
State California
Online Only (Y/N) N
Additional Online Files (Y/N) N
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