Appendix E: Change in Groundwater in Storage

Appendix E provides a technical memorandum that describes the data, assumptions, and methods used to analyze groundwater-level measurements, generate regional groundwater-level contour maps, and estimate the annual change in groundwater in storage within a groundwater basin or reporting area. For this analysis, custom geographic information systems (GIS) tools and workflows were developed and applied to groundwater-level data stored in the DWR Water Data Library (WDL).