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Duration-Severity and Cumulative Deficit Analyses for Colorado River Streamflow at Lees Ferry
This dataset holds scripts for Duration-Severity and Cumulative Deficit analyses developed to examine the severity of sustained droughts that have impact on storage and water supply in the Colorado River Basin. These analyses were performed using the methods described in Salehabadi, Tarboton et al. (2022; 2020). These studies analyzed the US Bureau of Reclamation Natural flow and Tree Ring Reconstructed flow from Meko et.al., 2017, both at Lees Ferry, using the Duration-Severity and Cumulative Deficit plots, which show the mean flow and cumulative magnitude of departure from average conditions, or “deficit”, for different durations. These plots presented by Salehabadi, Tarboton et al. (2020; 2022) characterize the severity of past droughts that have occurred in the Colorado River Basin. Based on examination of these plots, this study defined three drought scenarios: (1) Millennium Drought, (2) Mid-20th Century Drought, and (3) Paleo Tree Ring Drought. The first two were defined using the US Bureau of Reclamation Natural flows from 2000-2018 and 1953-1977 respectively. The last was defined using the years 1576-1600 from the Meko et al., 2017 tree ring reconstruction of streamflow at Lees Ferry.
- Salehabadi, H., D. G. Tarboton, B. H. Udall, K. G. Wheeler and J. C. Schmidt, (2022), "An Assessment of Potential Severe Droughts in the Colorado River Basin," JAWRA Journal of the American Water Resources Association, https://doi.org/10.1111/1752-1688.13061. - Salehabadi, H., D. G. Tarboton, E. Kuhn, B. Udall, K. G. Wheeler, D. E. Rosenberg, S. A. Goeking and J. C. Schmidt, (2020), "The Future Hydrology of the Colorado River Basin," White Paper 4, Future of the Colorado River Project, Center for Colorado River Studies, Utah State University, 71 p., https://qcnr.usu.edu/coloradoriver/files/WhitePaper4.pdf.
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Duration-Severity and Cumulative Deficit analyses performed by Salehabadi, Tarboton et al. (2020; 2022) to examine the severity of sustained droughts that have impact on storage and water supply in the Colorado River Basin.
In this resource, there are two scripts and one Excel file.
• "DurationSeverityAnalysis.R" : R code to perform the Duration-Severity analysis and create the plots.
• "CumulativeDeficitAnalysis.R" : R code to perform the Cumulative Deficit analysis and create the plots.
• "R_InputData.xlsx" : Input file for the scripts comprising two sheets as follows.
1. “AnnualWYTotalNaturalFlow_LF2018” sheet, which contains the annual water year total natural flow at Lees Ferry from U.S. Bureau of Reclamation, (2020), https://www.usbr.gov/lc/region/g4000/NaturalFlow/current.html.
2. “TR_Meko_2017-SK” sheet, which contains annual tree ring reconstructed flow at Lees Ferry from the most skillful model of Meko et al., 2017.
References
Meko, D. M., C. A. Woodhouse and E. R. Bigio, (2017), "Southern California Tree-Ring Study," California Department of Water Resources, https://pdfs.semanticscholar.org/fbaf/487604e2537c8f51037035e59c13113edeeb.pdf.
Salehabadi, H., D. Tarboton, E. Kuhn, B. Udall, K. Wheeler, D. Rosenberg, S. Goeking and J. C. Schmidt, (2020), "The Future Hydrology of the Colorado River Basin," Center for Colorado River Studies, White Paper 4, Utah State University, https://qcnr.usu.edu/coloradoriver/files/WhitePaper4.pdf.
Salehabadi, H., D. G. Tarboton, B. Udall, K. G. Wheeler and J. C. Schmidt, (2022), "An assessment of potential severe droughts in the Colorado River Basin," JAWRA Journal of the American Water Resources Association.
U.S. Bureau of Reclamation, (2020), Colorado River Basin Natural Flow and Salt Data, Colorado River Basin Natural Flow Database. Last modified January 10, 2020, https://www.usbr.gov/lc/region/g4000/NaturalFlow/current.html
Related Resources
This resource is described by
Salehabadi, H., D. G. Tarboton, B. H. Udall, K. G. Wheeler and J. C. Schmidt, (2022), "An Assessment of Potential Severe Droughts in the Colorado River Basin," JAWRA Journal of the American Water Resources Association, https://doi.org/10.1111/1752-1688.13061.
This resource is described by
Salehabadi, H., D. Tarboton, E. Kuhn, B. Udall, K. Wheeler, D. Rosenberg, S. Goeking and J. C. Schmidt, (2020), "The Future Hydrology of the Colorado River Basin," Center for Colorado River Studies, White Paper 4, Utah State University, https://qcnr.usu.edu/coloradoriver/files/WhitePaper4.pdf.
This resource was created using funding from the following sources:
Agency Name
Award Title
Award Number
Walton Family Foundation
Catena Foundation
Contributors
People or Organizations that contributed technically, materially, financially, or provided general support for the
creation of the resource's content but are not considered authors.
Name
Organization
Address
Phone
Author Identifiers
John C. Schmidt
Utah State University
Utah, US
Eric Kuhn
Former General Manager of the Colorado River Water Conservation District
Colorado, US
Brad Udall
Colorado Water Institute, Colorado State University
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