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Hope Mizzell, Ph.D. SC State Climatologist South Carolina Department of Natural Resources

Improving Drought Detection. Hope Mizzell, Ph.D. SC State Climatologist South Carolina Department of Natural Resources. Carolinas and Virginia Climate Conference. South Carolina’s Hydro-Logical Cycle. Drought Act and Regulations. State Drought Program.

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Hope Mizzell, Ph.D. SC State Climatologist South Carolina Department of Natural Resources

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  1. Improving Drought Detection Hope Mizzell, Ph.D. SC State Climatologist South Carolina Department of Natural Resources Carolinas and Virginia Climate Conference

  2. South Carolina’s Hydro-Logical Cycle Drought Act and Regulations State Drought Program Local Drought Plans and Ordinances Local Drought Committee (12) State Agency Drought Committee (5)

  3. South Carolina Drought Response Committee South Carolina Drought Response Committee Statewide Committee Members SC Dept. of Natural Resources SC Emergency Management Division SC Dept. of Health and Environmental Control SC Department of Agriculture SC Forestry Commission Local Committee Members Agriculture Industry Counties Municipalities Commissions of Public Works Domestic users Power Generation Facilities Private water suppliers Regional Councils of Government Public service districts Soil & Water Conservation Districts Special Purpose Districts Invited Participants Farm Service National Weather Service United States Dept. of Agriculture US Geological Survey

  4. Drought Declarations Drought committee reviews drought related variables such as : PDSI = Palmer Drought Severity Index CMI = Crop Moisture Index SPI = Standard Precipitation Index DM = National Drought Monitor KDBI = Keetch Byram Forest Fire Drought Index Streamflow = Average streamflow for two consecutive weeks Aquifer Level= Static water level for two consecutive months Specific numerical values for the indices that define each level of drought are established through regulation. 4 levels of drought: Incipient Moderate Severe Extreme

  5. Drought Monitoring Tools and Applications Drought Management Plan and Response Ordinance Inventory Water Conservation Actions Dynamic Drought Index

  6. Water Conservation Actions

  7. Drought Response Plans and Ordinances

  8. Web-based mapping tool that emerged in response to user needs during 1998-2002 drought in Carolinas. Shaped by interactions with stakeholders during Federal Energy Regulatory Commission (FERC) relicensing of dams on major river basins in the Carolinas. https://www.dnr.sc.gov/drought/

  9. * Rhee, J. and G.J. Carbone. A Comparison of Weekly Monitoring Methods of the Palmer Drought Index. Journal of Climate 20(24): 6033-6044.

  10. Exceptional Drought Extreme Drought Severe Drought Moderate Drought Abnormally Dry Map User Input • Classification method • Equal interval • Quantile • Natural break • U.S. Drought Monitor-comparable category • SC Drought Act

  11. Interpolation (IDW) 4 km X 4 km grids • 6 nearest stations • Search up to 12 nearest stations for data No data Next nearest station

  12. Map Navigation Tools

  13. Aggregation Rhee, J., G. J. Carbone, and J. Hussey. 2008. Drought index mapping at different spatial units. Journal of Hydrometeorology DOI: 10.1175/2008JHM983.1.

  14. Graph Create Graph Aggregated Features

  15. Table Create Table

  16. Comparison: time scale variabilityJanuary 1998 ~ December 2008 1-month SPI PDSI 3-month SPI 6-month SPI

  17. Percent frequency of drought in Oconee County 1951-2008

  18. FERC Low Inflow Protocol Stage 1 –Stage 4 11 Lakes Storage 3-Month USDM 6-month Streamflow or

  19. SPI 6-month, SPI 9-month, Blend 1, and Blend 2 drought stages compared to LIP

  20. Thank you! Hope Mizzell SC State Climatologist 1000 Assembly Street Columbia, SC 29201 803-734-9568

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