Courtesy of Westlands Water District
Westlands Water District is encouraged by the recent decision to employ adaptive management as part of implementing a regulation affecting our federal and state water projects. The decision was related to the implementation of the Fall X2 measure, one piece of a set of operational measures set to enforce the Endangered Species Act. This example of relying on recent scientific information and real-time monitoring is an encouraging example of how flexible management can contribute to achieving the co-equal goals of ecosystem protection and a reliable water supply for the farms that feed that nation.
Based on the broad body of scientific knowledge, which includes a recent peer-reviewed scientific assessment of the benefits of implementation of the Fall X2 action, the California Department of Water Resources (DWR) and the U.S. Bureau of Reclamation (Reclamation) modified the Fall X2 action using an adaptive management component of the action. The Fall X2 action is intended to provide beneficial habitat conditions in the Sacramento/San Joaquin River Delta for endangered Delta smelt and other native species after a wet or above-normal water year. Through adaptive management this year, the Fall X2 measure was implemented in September while adding an action to operate the Suisun Marsh Salinity Gates, providing much-needed additional food and habitat for the species.
The Fall X2 action for Delta Smelt has the potential to result in a large water supply reduction for cities and farms. In 2023 the water cost to implement the Fall X2 action was greater than 730,000 acre-feet between the Central Valley and State Water projects. This year’s action demonstrates the ability to use recent scientific information and monitoring to adaptively manage the enforcement of the Endangered Species Act while providing similar or better outcomes for the species. This year’s action also acknowledges the value of preserving our water resources for future purposes, including fish and wildlife benefits.
Allison Febbo, General Manager of Westlands Water District, stated, “Water is the lifeblood of our valley. We are encouraged to see the dedication from both State and Federal agencies to maximize the value of our limited water supplies while improving fishery conditions through flexibility and innovation. We applaud operators of both projects and fisheries agencies for their demonstrated commitment to science-based decision-making and their efforts to make transparent adaptive management a fundamental practice in the Delta.”
Fall X2 action modification aligns with the intended protections outlined in the 2020 Incidental Take Permit (ITP) and the 2019 Biological Opinion while smartly conserving our water supplies. Westlands looks forward to continuing our partnership with State and Federal agencies to refine these processes further, enhancing outcomes for both fisheries and water supply across California.