California Oil, Gas, and Groundwater Program

Cross Section of Fruitvale and Rosedale Ranch Groundwater Salinity

This cross-section was used in this study which modeled subsurface salinity in the vicinity of Fruitvale and Rosedale Ranch oil fields.

Some key findings:

  • Thickness and depth of fresh and brackish groundwater varies across these oil fields.
  • Salinities vary within the Chanac formation from 5,000 to about 30,000 ppm TDS.
  • This variation is systematic.
  • Variation is caused by (1) clay layer thickness, (2) distance from a major freshwater recharge source, and (3) faults.
Explore Results

The 3D model from this study can be explored using the button to the right or from the findings web page.