Zone 7 is preparing a salt management plan for the Livermore-Amador Valley Groundwater Basin. The purpose of the salt management plan (SMP) is to assess the salt loading to the groundwater basin, and to identify projects to mitigate that salt loading.  As a part of the salt management plan, the Water Resources Engineering section has prepared this report to document Zone 7's  understanding of the groundwater hydrology for the entire watershed of the Livermore-Amador Valley Groundwater Basin.

The entire watershed is divided into 11 smaller watersheds, as shown on the figure below. The average groundwater hydrology for each watershed for current land use conditions and for year 2030 land use conditions is estimated based upon available data. For year 2030 conditions, the report uses the land use data from the technical memorandum prepared by consultant Camp Dresser & Mckee Inc., for "Final Task 4- Water and Land use in Livermore-Amador Valley."  The net average recharge in each sub-watershed is calculated, and Zone 7's understanding of the fate of net recharge based upon its existing monitoring program is documented.

This report also estimates the impacts on the Main Groundwater Basin due to increases in  development area (urban & agricultural) in each sub-watershed.  The additional monitoring that is needed to quantify the actual water and salt impact on the Main Basin due to increased development for each watershed also is documented.

For a detailed view and description of each watershed, click on the desired watershed number on the map below.