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GeoSystems Analysis, Inc. • 2015 N. Forbes Blvd., Suite 105 • Tucson, AZ 85745 • 520-628-9330 • fax 520-628-1122
 Copyright © 2011 GeoSystems Analysis Inc. All Rights Reserved.
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The GeoSystems Analysis, Inc. hydrologic property testing laboratory uses state-of-the-art methods to determine saturated/unsaturated flow properties of porous media.  In particular, we specialize in determining the flow properties of soils and waste materials with significant amounts of rock (gravel) fragments under various conditions of saturation and load (consolidation) pressures.  Our laboratory provides hydraulic parameter estimates that can be used to predict the performance of metal recovery heap leaching operations, mine closure cover systems, groundwater remediation efforts and groundwater recharge operations.  





Our hydrologic testing laboratory is the only laboratory in the United States which measures complete hydrologic and physical parameters for high gravel content materials.
We also offer specialized core testing, subsurface sensor calibration and data reports in client-specified format.  Additionally, in the absence of reliable site-specific data, we can provide reasonable estimates of flow parameters from an extensive soils database that relates particle-size distribution to various flow
All laboratory testing is directly supervised by Dr. Mike Yao.  Dr. Yao has over 20 years experience in unsaturated flow testing and in the development of experimental methods to determine hydraulic properties and subsurface sensor calibration.  His expertise ensures that appropriate tests are conducted and resulting data are of the highest quality.
2010 Laboratory Pricing

Hydrologic Testing Laboratory

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We provide measurement of the following key flow- and transport-related physical, hydraulic, and chemical parameters for soil and rock samples.


Hydraulic Properties

Saturated Hydraulic Conductivity

Moisture Retention

Direct Unsaturated Hydraulic Conductivity Measurement

Calculated van Genuchten, Xing

and Fredlund parameters and data analysis


Geochemical Indicator Parameters

Soil pH

Soil Electrical Conductivity


Special Large-Core Testing

Saturated/Unsaturated Hydraulic Parameters


Soil Instrument Calibration

Heat Dissipation Probe, Gypsum Block, and Neutron Moisture Probe


Estimated hydraulic parameters using pedo-transfer functions