Groundwater Briefing Stanislaus County WAC 2/26/2014 Sarge Green California Water Institute

1. Groundwater Briefing Stanislaus County WAC 2/26/2014 Sarge Green California Water Institute

2. Groundwater Basics • Foundation and principles • Usufruct • Correlative right • Water use equity • Groundwater science and problem-solving • The tools for accomplishing the goals • The groundwater basin management groups • WAC represents the areas outside of the groups • Implementation of the ordinance

3. Foundation • Usufruct • Correlative Right • Water use equity

4. Groundwater Science - Background • Groundwater is about 42% of water supplies in the Valley • Surface water is the source of groundwater replenishment • Groundwater meets all demands in some locations

6. EXPLANATION WEST Clay , silty clay Laminated silt, sandy silt, clayey silt Laminated silt, sandy silt, fine and medium sand, clayey silt Cross-bedded fine and medium sand Coarse sandy gravel, gravelly coarse sand Very poorly sorted, bouldery coarse sandy gravel Pediment Upper & Middle Alluvial Fan EAST Middle & Lower Alluvial Fan Mudflow Fan Bedrock Basin Floor Eolian Deposits

7. ILRP 7

8. Corcoran Clay – location and importance

11. Groundwater Conditions GIS Presentation of Valley Groundwater

12. Contemporary Groundwater Issues • Subsidence • Irrigated Lands Program, water quality assessments • “Fracking” • Land conversion

13. Subsidence

14. “Fracking”

16. Summary • Apply the principles • Get the science such as conditions assessments and for coordinated management opportunities • Support implementation efforts that solve problems • Use the ordinance to manage for equity when appropriate