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Urban Centers Imported Water Groundwater Usage

50 year Minimum Flow Record Significant Trends Mann-Kendall Test. Urban Centers Imported Water Groundwater Usage. Three out of the last seven years have had inflows lower than two standard deviations below the mean. . INTERA. Recent Flows 69% Of Historical.

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Urban Centers Imported Water Groundwater Usage

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  1. 50 year Minimum Flow Record Significant Trends Mann-Kendall Test Urban Centers Imported Water Groundwater Usage

  2. Three out of the last seven years have had inflows lower than two standard deviations below the mean. INTERA

  3. Recent Flows 69% Of Historical

  4. Is the current drought WORSE than the Drought of Record? Duration: More than 24 months since lakes were full Intensity: Inflows less than LCRA “Envelope Curve” Combined Storage: Less than 600,000 acre-ft Source: www.lcra.org_library_media_public_docs_water_wmp_TMs_A-1_thru_A-6_2012May

  5. Criteria 1 - Duration: More than 24 months since lakes were full Current Drought: 63 Months

  6. Criteria 2 - Intensity: Inflows less than LCRA “Envelope Curve”

  7. Is the current drought WORSE than the Drought of Record? As of July 9 – Combined Storage = 726,000 acre-ft Criteria 3 - Combined Storage: Less than 600,000 acre-ft What if Emergency Orders were not granted in 2012 & 2013?

  8. Criteria 3 - Combined Storage: Less than 600,000 acre-ft Following Current WMPReleases: 180,044 Acre-ft 2012 128,944 Acre-ft 2013

  9. Criteria 3 - Combined Storage: Less than 600,000 acre-ft

  10. CTWC Conclusions • Highland Lake Inflows have Decreased • 1999-Present  69% of Historical • Current Drought  Worse than DOR • WMP Does not protect Highland Lakes • Firm Yield needs re-calculation • Current planning methods should not assume future will mimic observed past

  11. Thanks for your attention! Questions?

  12. Criteria 3 - Combined Storage under 2012 WMP: Less than 600,000 acre-ft Following Pending WMPReleases: 120,000 Acre-ft 2012 1st Crop 45,000 Acre-ft 2012 2nd Crop 120,000 Acre-ft 2013 1st Crop

  13. Criteria 3 - Combined Storage Under 2012 WMP: Less than 600,000 acre-ft

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