Unimpaired Flow Calculation Data for Three San Joaquin Basin Tributaries in California’s Central Valley
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| Owners: | Lindsay Murdoch |
| Type: | Resource |
| Storage: | The size of this resource is 11.6 MB |
| Created: | Oct 12, 2021 at 10:01 p.m. |
| Last updated: | Oct 18, 2021 at 6:19 p.m. |
| Citation: | See how to cite this resource |
| Content types: | Single File Content |
| Sharing Status: | Discoverable (Accessible via direct link sharing) |
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Abstract
This technical report details methods used to estimate daily unimpaired flow (UF, but often referred to as “Full Natural Flow” or FNF in this report) on the Stanislaus River at Goodwin Dam, Tuolumne River below La Grange Dam, and Merced River at New Exchequer Dam and aims to replicate the methods used to produce daily FNF values published on the California Data Exchange Center (CDEC) website. For each FNF station, these FNF methods are used to reproduce CDEC’s published values for daily FNF for two months (April 2018 and April 2019), and for an 11-year period (October 2008-September 2019). Reproduced daily FNF values were then compared to those reported on CDEC. Results of this study show that for these locations on the Stanislaus, Tuolumne, and Merced Rivers, daily FNF computations are largely reproducible, but reproducibility declines when flows are low. Methods and data sources used to compute daily FNF varied from those described by DWR for FNF for some tributaries. Public access to data and methods (e.g., published to a public website) is necessary for reliable reproducibility of FNF and implementing an instream flow requirement based on daily FNF. Refinements to improve overall reproducibility of daily FNF computations are also proposed for consideration, including more formal publication of calculation methods and the retention of provisional data and intermediate calculations suitable for regulatory purposes.
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| This resource is referenced by | Pulido, A., Pasner, Y., Murdoch, L., Hill, A., Lund, J., & Fleenor, W. (2021). Unimpaired Flow Calculations for Three San Joaquin Basin Tributaries in California’s Central Valley. (Report generated for California State Water Resources Control Board) |
| This resource is referenced by | https://github.com/YMPasner/summaryData_dailyFNF_WY2009-2019 |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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