We support scientific research to improve water resources management and policy with the ultimate objective of improving the lives of Californians and protecting California’s natural resources. Investigators who receive funding from the Center for California Water Resources Policy and Management carry out studies using data on the imperiled native fishes and environmental factors in the Sacramento-San Joaquin Delta to evaluate management-relevant hypotheses, quantitatively relating the performance of species listed under state and federal endangered species acts to their dynamic, degraded habitats. The Center also funds research aimed at providing guidance to the fish and wildlife and water-resource agencies regarding standards of conservation practice.
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Is high Delta outflow in the autumn necessary for the conservation of delta smelt? Data and analyses say no, the IEP’s spin doctors say yes
Recently, the Interagency Ecological Program (IEP) — an interagency consortium charged “to provide and integrate relevant and timely ecological information for management of the Bay-Delta” — released a report presenting data and studies regarding a major conservation action for delta smelt, referred to as the Fall X2 Action. The Fall X2 Action purports to benefit the delta smelt during the autumn by increasing outflow through the Sacramento-San Joaquin Delta during that period in years where there is above normal precipitation in the preceding winter and spring. Increasing outflow through the Delta moves the position of the tidally influenced low-salinity zone westward. The federal and state wildlife agencies contend that this action
Paul S. Weiland
August 18, 2021
