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Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

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Tectonic influences on ground water quality: insight from complementary methods.

Sam Earman¹, Brian J O L McPherson, Fred M Phillips

¹Division of Hydrologic Sciences, Desert Research Institute, Reno, NV 89512, USA. searman@dri.edu

|January 16, 2008

Summary

Tectonic activity significantly influences groundwater systems. This study reveals unique hydrogeology in San Bernardino Valley due to its distinct geology, offering insights for tectonically active regions globally.

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Area of Science:

Hydrogeology
Tectonics
Geochemistry

Background:

Groundwater is vital for domestic use, agriculture, and biodiversity in the San Bernardino Valley.
Understanding groundwater systems is crucial for sustainable resource management in tectonically active areas.

Purpose of the Study:

To investigate the tectonic influences on groundwater systems in the San Bernardino Valley.
To compare the hydrogeology of the San Bernardino Valley with its neighboring basins.

Main Methods:

Major ion geochemistry
Isotope hydrology
Dissolved gas analysis
Aquifer testing
Geophysics
Geological examination

Main Results:

The San Bernardino Valley's hydrogeology differs significantly from adjacent basins in water quality, chemical evolution, storage, and residence time.
These differences are attributed to the unique geology, including a magmatically active accommodation zone.
A comprehensive understanding was achieved by integrating multiple investigation methods.

Conclusions:

The distinct geology of the San Bernardino Valley creates unique groundwater characteristics.
This basin can serve as a model for understanding groundwater chemical evolution in tectonically diverse regions worldwide.