The State Water Resources Control Board held a public workshop on December 12, 2024, to discuss draft updates to the Bay-Delta Plan, focusing on the implications of voluntary agreements (VAs) and unimpaired flow approaches for managing water resources in California. The meeting highlighted significant concerns regarding how reference flows are accounted for and the potential impact of future projects on these flows.

Key discussions centered on the complexity of reference flows, which are tailored annually for each river and are critical for managing water resources, particularly for salmon habitats. Participants emphasized that current conditions affecting these reference flows could change, potentially diminishing the anticipated benefits of the voluntary agreements. Factors such as climate change, operational shifts, and new diversion proposals could significantly alter these flows, raising alarms about the adequacy of protections for existing water resources.

The workshop also examined how the VA and unimpaired flow approaches would safeguard water from future diversions. Critics argued that the VA approach fails to adequately protect existing flows, particularly during critical periods for juvenile salmon migration. The unimpaired flow approach, in contrast, aims to maintain a minimum percentage of natural flow in rivers, which could better support ecological needs.

Several speakers expressed skepticism about the effectiveness of the VA approach, citing its reliance on complex accounting methods that may not yield the promised increases in water flow. Concerns were raised about the potential for project operators to exploit loopholes in the regulations, undermining the intended environmental protections.

In conclusion, the workshop underscored the urgent need for clear, science-based rules that apply uniformly to all water users. Participants called for a transparent approach to verifying compliance with flow requirements, emphasizing that the current VA framework does not meet these essential criteria. The discussions highlighted the critical intersection of water management, environmental protection, and the future of California's water resources, setting the stage for ongoing debates as the Bay-Delta Plan evolves.