Seawater intrusion in the Salinas Valley has been studied since the 1940s. This page contains a library of reports and related materials on seawater intrusion from several agencies and sources.

1946 Salinas Basin Investigation Summary Report

1976 Hydrogeological Report on the Deep Aquifer

1976 Report on Castroville Irrigation Project Part 1

1976 Report on Castroville Irrigation Project Part 2

1988 Simulated Effects of Ground-Water Management Alternatives for the Salinas Valley

2001 Final Report: Hydrogeologic Investigation of the Salinas Valley Basin

2002 Geohydrology Deep Aquifer Monitoring

2003 Technical Memorandum: Deep Aquifer Investigation

2004 Hydrostratigraphic Analysis of the Northern Salinas Valley

2005 Final Report: Installation of Deep Aquifer Monitoring Wells

2007 El Toro Groundwater Study

2017 MCWRA Recommendations to Address Expansion of Seawater Intrusion

2017 Salinas Valley Groundwater Level Contours & Seawater Intrusion Maps

2018 Deep Aquifers Roundtable Meeting

2019 North Monterey County Crought Contingency Plan

2019 Integrated Coastal Groundwater Monitoring Program and Plan

2020 Update: MCWRA Recommendations to Address Expansion of Seawater Intrusion

Mapping Aquifer Systems with Airborne Electromagnetics in the Central Valley of California

Using an Airborne Electromagnetic Method to Map Saltwater Intrusion in the Northern Salinas Valley, California

Electrical Resistivity Imaging Seawater Intrusion into the Monterey Bay Aquifer

Calibrating a Saltwater Intrusion Model with Time-Domain Electromagnetic Data

Interpretation of Hydrostratigraphy and Water Quality from AEM Data Collected in the Northern Salinas Valley, CA

Mapping Saltwater Intrusion With an Airborne Electromagnetic Method in the Offshore Coastal Environment, Monterey Bay, California

2020 Independent Evaluation, Modification, and Use of the North Marina Groundwater Model to Estimate Potential Aquifer Impacts

2018 Greater Monterey County Integrated Regional Water Management Plan

Monterey Peninsula Water Management District Total Water Management: Evaluating Options for a Reliable Water Future

Well Completion Reports

2017 Hydrologic Working Group Hydrogeologic Investigation

2019 Weiss Review of Recent Data and Studies

2018 HWG Response to Legal Brief Tech

2019 Marina Permit HWG Response

2019 Exhibit 14 HWG AEM Response

AGF-MCWD 2019 Final AEM Report

2018 FO Sampling Data Transmittal

2019 MCWD AEM Study Supplemental Information

Stanford AEM Method to Map Seawater Intrusion Geophysics

2017 Stanford AGF AEM Study Report Final

Appendix 1 – 2D Profiles 2019 Rho-Elogs Comparison

Appendix 1 – 2D Profiles 2017 2019 Rho Comparison with Lith Logs

Appendix 1 – 2D Profiles 2019 Rho-CLconc Lith-Elogs Comparison

Appendix 1 – 3D Fence Diagram

Appendix 1 – 2D Profiles 2019 2019 CLconc Comparison with Logs

Appendix 2 – 3D Fence Diagram MCWD 2019 Rho

Appendix 2 – 3D Fence Diagram MCWD 2019 CLconc

Appendix 2 – 3D Voxels – Comparison 2017-2019 VoxelBelowRho75 for Ranges 1-500 and 10000-40000

Appendix 2 – 3D Voxel Depth Slices – Comparison 2017-2019 CL Concentrations

Appendix 2 – 3D Voxel Easting Slices – Comparison 2017-2019 CL Concentrations

Appendix 2 – 3D Voxel Northing Slices – Comparison 2017-2019 CL Concentrations

Geosciences Support Services Reports for Cal-Am Project

2014 GSSI Exploratory Boreholds (TM1)

2014 GSSI Slant Well Predictive Scenarios

2015 GSSI MPWSP Groundwater Modeling and Analysis

2017 GSSI Monitoring Well Completion Report (TM2)

Maps

p180_2022_SWI

Pressure 180-Foot Aquifer

p400_2022_SWI

Pressure 400-Foot Aquifer

DeepWells_map

Deep Wells Map

DeepAquifers_WellsMap_August2020

Deep Aquifer Wells

Deep Wells Map

(.kml file which requires an Earth browser such as Google Earth to open)