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.

Data