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

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

or… The Drought Ain’t Over Until John Nielsen-Gammon Sings

Drought categories with time100 90 80 70 60 50 40 30 20 10 0

RESERVOIR CONSERVATION STORAGE DATA ( ) -1% from last week

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%)

“Lake” Meredith (Texas share)

O.H. Ivie Reservoir

Lake Brownwood

Lake Travis

Falcon Reservoir (Texas share)

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)

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

Streamflow Index30-day Mean Flow Conditions

Groundwater Level in J-17 Well Stage 1 Stage 2 Stage 3http://www.saws.org/our_water/aquifer/

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

El Nino/La Nina: 50% chance of El Nino 2nd half 2012

Demand v. Supply Demand for waterAcre-feet Water we have now

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

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

by The Texas Network on Jun 21, 2012

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Drought: It Ain’t Over Till It’s Over Presentation Transcript