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Drought Impacts from a Low Flow/Stage Database

Drought Impacts from a Low Flow/Stage Database. North American Drought Monitor Forum Asheville, NC April 20, 2010 Doug Kluck – National Weather Service/NOAA. Advanced Hydrologic Prediction Service. Flood early warning system Network of 3568 stream gauges Providing current

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Drought Impacts from a Low Flow/Stage Database

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  1. Drought Impacts from a Low Flow/Stage Database North American Drought Monitor Forum Asheville, NC April 20, 2010 Doug Kluck – National Weather Service/NOAA

  2. Advanced Hydrologic Prediction Service • Flood early • warning system • Network of 3568 • stream gauges • Providing current • river flow/stage data • Up to 7-day • forecasts at many • forecast points • 90-day probabilistic • forecasts at 1,376 • forecast points http://www.weather.gov/ahps/

  3. Flooding? We have it covered

  4. What is the low flow impacts database? • It is a systematic collection of low flow and stage impacts similar to flood impacts at NWS forecast points • Current system built for flooding • Does not address low flows adequately

  5. Who and Why? • National Drought Mitigation Center (NDMC) contracted • One source: Consistent format for surveying • Excellent contacts throughout the country • Immense time savings to NWS • Living database, future expansion may be done locally

  6. Survey Questions • What are the impacts of low river levels? • At what stage/flow do impacts occur? • Which AHPS site(s) best reflect the impacts? • Other factors that affect particular impacts/locations (e.g. seasonality)

  7. Impacts Identified • Several potential impacts identified • loss of municipal, industrial, and agricultural water • activation of water rights regulation procedures • activation of state and local drought response plans • reduced recreational opportunities • hydropower losses • dredging to maintain navigation • fish and wildlife losses • exposure of infrastructure • increased effluent testing (NPDES)

  8. Who benefits from this information? • Information benefits the many needs of various user communities including navigation, recreation, environmental, agriculture, energy, local public water usage, federal, etc… • Internally used for graphics, drought information statements and monitoring

  9. Data Example Fort Laramie, Wyoming

  10. Data Example

  11. Data Example

  12. NWS/NOAA Usage Websites, hydrographs, non-exceedance probability graphs and national/local drought information

  13. What’s Been Done? Source: NDMC

  14. Closing Thought • NIDIS Vision “A dynamic and accessible drought information system that provides users with the ability to determine the potential impacts of drought and the associated risks they bring, and the decision support tools needed to better prepare for and mitigate the effects of drought.”

  15. Thank You

  16. When Can the Field Change the Database? • Now! Currently their exists an interface to add such information in Hydrobase (Rivergage/Low Water Statement) • On July 24th, the field will have the ability to turn on the ability to show low flow/stage information in AHPS (CMS) on a forecast point by forecast point basis. • WFO’s will be able to add low flow information to the AHPS page as well • Eventually Hydrobase will be directly linked to AHPS…Caution Not Yet Though!

  17. What Can We Do to Help? • Regions can help out by organizing the effort and determining the course of action. So far all funding has come from the Regions. It’s a slow process. • WFOs can help by helping the contractor with local information for contacts and providing specific low flow information. • NWSHQ can help out by providing funding and direction.

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