Fig. 4: Uncertain and heterogeneous performance of the Compromise Partnership.

a Map showing participating water providers for the Compromise Partnership, which invests in both canal expansion and groundwater banking. Partners are colored by their ownership share in the partnership, while non-partners are colored white. b Parallel coordinate plot showing partnership performance across four conflicting objectives. Each gray line represents the performance of a different optimal tradeoff partnership, aggregated across the 79 sampled 30-year daily hydrologic sequences. The green line represents the aggregated performance of the Compromise Partnership, while the green shaded areas show the probability distribution of single-scenario performances for the Compromise Partnership. c Heterogeneity of partner-level performance for the Compromise Partnership. Each shaded area labeled 1–16 represents the distribution of costs of gains for a different water provider partner across the 79 sampled 30-year daily hydrologic sequences. The partners are sorted and colored by ownership share. The distributions labeled “All” represent the partnership-level aggregated costs (black) and the costs for the worst-off partner across alternative scenarios.