Groundwater accounts for approximately 40 percent of California’s water supply during average climatic conditions. This percentage increases to nearly 60 percent during dry years or periods of drought (California Department of Water Resources [DWR], 2013). Despite its importance, California lacked a statewide framework for regulating the resource until passage of the Sustainable Groundwater Management Act (SGMA) in 2014.
Groundwater models can be a powerful tool for informing water management by educating stakeholders, identifying data gaps and improving understanding. This report provides a framework for model development under California’s Sustainable Groundwater Management Act (SGMA).
Groundwater provides up to 60 percent of California's water supply, contributes to stream flow, and supports many ecosystems. Despite its importance, groundwater went unregulated until passage of the Sustainable Groundwater management act in 2014 (SGMA).
The passage of the Sustainable Groundwater Management Act (SGMA) in 2014 has launched an unprecedented, locally driven process to form hundreds of new public agencies that will play a critical role in managing the state’s groundwater resources for decades to come.