Hrbwa dmmgjm 22_oct2012

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Hrbwa dmmgjm 22_oct2012

  1. 1. Current and potential cloud seeding in the Humboldt River BasinMark Green, John Mejia and David Mitchell Desert Research Institute
  2. 2. WY2013 Ruby Mountains Project Area
  3. 3. WY2013 Tahoe-Truckee Project Area
  4. 4. WY2013 Walker Basin Project Area
  5. 5. Eastern Nevada Project Area (seeding starting in WY2014) Figure 3. Map showing several of the mountainous areas (blue shading) considered in the DRI cloud seeding feasibility study for eastern Nevada. The prototype project is planned for the northern portion of the Schell Creek Range in the center of the map. Possible seeding sites tested with a plume dispersion model are indicated by blue pins and green flags. SNOTEL or snow course sites are shown by red Xs. Red and yellow shaded areas represent specific creek drainages and purple triangles show stream gauge locations.
  6. 6. FY 2014 Cost estimate for continuing Ruby Mountains seeding operationsStart with SNWA WY2013 funding of $252KApply 5% increase for inflation= $265KFor 7 generators, about $38K per generator for full networkAssume reduced network size saves 60% of average percost when reducing network size. Number of Total generators costCosts of starting any programs innew areas high first year due to 7 $265Ksite establishment costs 6 $242K 5 $219K 4 $197K 3 $174K
  7. 7. Map of SNOTEL sites givesgood indication of potentialseeding areas
  8. 8. Granite Peak Snotel siteat 8543’ in Santa RosaMtnsSpring 2011 had over 100” snowdepth
  9. 9. Bear Creek SNOTELsite 8040’ in theJarbidge Range
  10. 10. Jack’s Peak SNOTEL site -8420’near the headwaters of theNorth Fork Humboldt River,Independence MountainsSpring 2011 had over 100” snow depth
  11. 11. In the past DRI operated cloud seeding generators targetingthe Independence Mountains north of Elko and nearby areas
  12. 12. Big Creek Sum SNOTEL site at8695’ in the Toiyabe Range,headwaters of the ReeseRiver, a tributary of theHumboldt River
  13. 13. Seeding has been done by DRI in the Toiyabe Range
  14. 14. Use of the Weather Research and Forecasting Model (WRF)In Cloud Seeding Research and Operations: Our overall motivation is to use the model to better understand/track the evolution of cloud seeding aerosol in time and space. Current uses of WRF include:1) Selection of cloud seeding generator sites in planning future Programs2) Decision making support for when to conduct cloud seeding
  15. 15. 3-day forecast of some criteria usedto decide whether to commencecloud seeding, using the WRF Modelat DRI.
  16. 16. This morning’s Radar image and wind profilefrom NWS Elko- let’s us know if precipitation isoccurring and if winds are in the right direction
  17. 17. Mesowest display of temperature, precipitation, windsand Radar for the Ruby Mountains area
  18. 18. Testing of Generator Sites in Eastern Nevada Project Area Figure 3. Map showing several of the mountainous areas (blue shading) considered in the DRI cloud seeding feasibility study for eastern Nevada. The prototype project is planned for the northern portion of the Schell Creek Range in the center of the map. Possible seeding sites tested with a plume dispersion model are indicated by blue pins and green flags. SNOTEL or snow course sites are shown by red Xs. Red and yellow shaded areas represent specific creek drainages and purple triangles show stream gauge locations.
  19. 19. Summary1. WRF provides advance knowledge of when favorable cloud seeding conditions are likely to develop.2. WRF combined with a plume dispersion model greatly improves our ability to locate cloud seeding generators in areas that will optimize snowfall amounts in targeted areas.3. Location of generator sites also depends on accessibility and authorization of land owner or responsible agency.

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