Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Drought: It Ain't Over Till It's Over

1,201 views

Published on

Presentation at the TWCA mid year conference 2012 www.twca.org

Robert E. Mace, Ph.D., P.G.
Texas Water Development Board
presented to the Texas Water Conservation Association
Horseshoe Bay, Texas, June 15, 2012

Published in: Education, Technology, Business
  • Be the first to comment

  • Be the first to like this

Drought: It Ain't Over Till It's Over

  1. 1. Drought: It Ain’t Over Till It’s Over… Robert E. Mace, Ph.D., P.G. Texas Water Development Boardpresented to the Texas Water Conservation Association Horseshoe Bay, Texas, June 15, 2012
  2. 2. or… The Drought Ain’t Over Until John Nielsen-Gammon Sings
  3. 3. Drought categories with time100 90 80 70 60 50 40 30 20 10 0
  4. 4. Drought categories with time100 90 80 70 60 50 40 30 20 10 0
  5. 5. RESERVOIR CONSERVATION STORAGE DATA ( ) -1% from last week
  6. 6. Reservoir Storage by Climatic Region (% Full) (Change from 5/30/2012) (+0.03%) (+0.14%) (-0.37%) (-0.71%) (-0.11%) (-0.20%) (-0.40%) (-1.77%) (-1.05%)
  7. 7. “Lake” Meredith (Texas share)
  8. 8. O.H. Ivie Reservoir
  9. 9. Lake Brownwood
  10. 10. Lake Travis
  11. 11. Falcon Reservoir (Texas share)
  12. 12. Total storage in Elephant Butte ~ 2,000,000 acre-feet (totalstorage in Caballo varies during the year from ~350,000acre-feet to 50,000 acre-feet)
  13. 13. April 1-30, 2012 30-Day Precipitation 86% Percentage of Normal 60% May 1-30, 2012 45% 74% 99% 38% 60% 42% 101% 44% 55% 51% 47% Percentage of Normal 48% 0%-19% 20%-39% 204% 137% 40%-59% 60%-79% 80%-99% 105% 100%-119% 72% >120% 105% 73%http:// www.southernclimate.org/products/precip.php
  14. 14. Streamflow Index30-day Mean Flow Conditions
  15. 15. Groundwater Level in J-17 Well Stage 1 Stage 2 Stage 3http://www.saws.org/our_water/aquifer/
  16. 16. Public Water Supply Systems Affected by Drought June 6, 2012Total number of Community water systems affected: 1009Total number of active Community water systems in Texas: 4699 RESOLVED (1) WATCH – Voluntary (417) WATCH – Mandatory (592)http://www.tceq.state.tx.us/permitting/water_supply/pdw/trot/location.html
  17. 17. El Nino/La Nina: 50% chance of El Nino 2nd half 2012
  18. 18. Demand v. Supply Demand for waterAcre-feet Water we have now
  19. 19. Robert E. Mace, Ph.D., P.G. Texas Water Development Boardpresented to the Texas Water Conservation Association Horseshoe Bay, Texas, June 15, 2012

×