In the Sacramento Valley, California, USA, we first define 'water system failure' locally using groundwater sustainability plans from each of 20 groundwater districts, and use them to calculate baseline resilience over time for each district. Then, in the public hydrologic model SVSim, we simulate two green infrastructure scenarios of regional interest, MAR through expanded flood irigation and levee setbacks, and calculate the 20 resilience time series for each scenario. This lets us estimate hydrologic benefits (heads and flows) of these scenarios in different water year types, and identify which places benefit from each scenario, influenced by which geographic or hydrogeologic constraints.