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TWDB Subsidence StudyJanuary 26, 2017
TAGD Business Meeting
Jordan Furnans, PhD, PE, [email protected]
(512) 736-6485
GLS Solutions, Inc.
Project Objectives
• Analyze the major and minor Texas aquifers for the subsidence risk
• Develop subsidence prediction tools for at-risk aquifers
• Recommendation of subsidence monitoring methods
Data Compilation
Three primary variables: • distribution, thickness, and compressibility
of clay layers• amount and timing of water-level changes• lowest historical water level
Data types we will focus on: • Geologic depositional history• Aquifer material geotechnical properties
(eq clay content, compressibility) • Water-level data• Pumping data• Subsidence observations (land surface
elevation changes)
Clay Layer Compaction
What We’ll Be doing…
• Contacting Potential Data Sources
• Reviewing Data
• Assessing Risk
• Recommending Monitoring
• State-wide Reporting
Jordan Furnans, PhD, PE, PG, CFMProject Manager – TWDB Subsidence Project
1101 Satellite View #301 – Round Rock, TX 78665
