Category Archives: RESEARCH AND REPORTS

Forecasting the Most Likely Status of Wild Salmon in the California Central Valley in 2100

AUTHORS: Franks, Sierra E., Oregon State University, Corvallis; Lackey, Robert T., Oregon State University, Corvallis ABSTRACT: Since the mid-1800s the Sacramento–San Joaquin river system in the California Central Valley has experienced a dramatic decline in the distribution and abundance of wild salmon, along with many extirpations. The causes of the decline are many, and have been well studied. Despite restoration […]

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Modeling Tidal Freshwater Marsh Sustainability in the Sacramento–San Joaquin Delta Under a Broad Suite of Potential Future Scenarios

AUTHORS: Swanson, Kathleen M., San Francisco Public Utilities Commission; Drexler, Judith Z., U.S. Geological Survey, California Water Science Center; Fuller, Christopher C., U.S. Geological Survey, National Research Program; Schoellhamer, David H., U.S. Geological Survey, California Water Science Center ABSTRACT: In this paper, we report on the adaptation and application of a one-dimensional marsh surface elevation model, the Wetland Accretion Rate […]

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Three-Dimensional Modeling of Hydrodynamics and Salinity in the San Francisco Estuary: An Evaluation of Model Accuracy, X2, and the Low–Salinity Zone

AUTHORS: MacWilliams, Michael L., Delta Modeling Associates, Inc.; Bever, Aaron J., Delta Modeling Associates, Inc.; Gross, Edward S., Resource Management Associates, Inc.; Ketefian, Gerard S., Resource Management Associates, Inc.; Kimmerer, Wim J., Romberg Tiburon Center, San Francisco State University ABSTRACT: The three-dimensional UnTRIM San Francisco Bay–Delta model was applied to simulate tidal hydrodynamics and salinity in the San Francisco Estuary […]

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The impact of surface water diversions for marijuana cultivation on aquatic habitat in four Northwestern California watersheds

AUTHORS: Scott Bauer, Jennifer Olson, Adam Cockrill, Michael van Hattem, Linda Miller, Margaret Tauzer, Gordon Leppig ABSTRACT: “Marijuana (Cannabis sativa L.) cultivation has proliferated in northwestern California since at least the mid-1990s. The environmental impacts associated with marijuana cultivation appear substantial, yet have been difficult to quantify, in part because cultivation is clandestine and often occurs on private property. To […]

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Journal article: Anthropogenic warming has increased drought risk in California

Authors: Noah S. Diffenbaugh, Daniel L. Swain, and Danielle Touma ABSTRACT: “California is currently in the midst of a record-setting drought. The drought began in 2012 and now includes the lowest calendar-year and 12-mo precipitation, the highest annual temperature, and the most extreme drought indicators on record. The extremely warm and dry conditions have led to acute water shortages, groundwater […]

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