Structural Control of Ground-Water Induced Debris Flows

by Souren Ala, Texas A&M Univ, United States,
Christopher C. Mathewson, Texas A&M Univ, United States,



Document Type: Proceeding Paper

Part of: Hydraulics/Hydrology of Arid Lands (H²AL)

Abstract:

A number of case studies have attributed debris flow initiation to the effect of elevated pore pressure from a bedrock ground-water source. Debris flows on slopes underlain by Precambrian metamorphic rocks of the Wasatch Front, Utah, fall into this category. Bedrock structural trends suggest that northwest-trending faults are avenues for ground-water flow. This may explain the higher number of debris flows on slopes intersecting fault traces.



Subject Headings: Groundwater flow | Water pressure | Bedrock | Debris | Geological faults | Groundwater recharge | Pore water

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