1. The State Water Plan and
Regional Water Planning Group Updates
from the Groundwater Perspective

2. REGIONAL WATER PLANNING
AND THE 2012 STATE WATER PLAN

3. REGIONAL WATER PLANNING: 12 INTERESTS
Public River authorities
Counties Electric-generating
Municipalities utilities
Industries
Agriculture
Environment Water districts
Water utilities
Groundwater
management areas Small businesses

4. GROUNDWATER MANAGEMENT AREAS
AND REGIONAL WATER PLANNING AREAS

5. REGIONAL WATER PLANNING PROCESS
Project future population and water demand
Quantify existing and future water supplies
available during repeat of drought of record
Identify surpluses and needs
Evaluate and recommend water management
strategies
Make policy recommendations
Adopt the plan
Existing Projected Surplus
Water Water (+) or
Supplies Demand Need (-)

6. REGIONAL WATER PLANNING: BY THE NUMBERS
16 regional water 6 water use categories
planning groups
12 3,000
interest groups water user groups
450 voting and non- 562 recommended
voting planning group water management
members strategies to meet needs
6

8. HISTORIC AND PROJECTED TEXAS
50.0
POPULATION GROWTH
46.3
45.0
41.9
40.0 37.7
Texas Population (millions)
35.0 33.7
29.7
30.0
25.4
25.0
20.9
20.0
17.0
15.0
14.2
11.2
9.6
10.0 7.7
5.8 6.4
4.7
5.0 3.0 3.9
0.0
1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 2020 2030 2040 2050 2060
8

9. PROJECTED POPULATION GROWTH BY COUNTY

10. PROJECTED TOTAL WATER DEMAND
(ACRE-FEET PER YEAR)
25,000,000
21,952,198
21,190,527
20,517,886
19,821,152
20,000,000 19,038,954
18,010,599
15,000,000
10,000,000
5,000,000
0
2010 2020 2030 2040 2050 2060

11. WATER DEMAND PROJECTIONS

12. GROUNDWATER USE
Groundwater provided 57 percent of
the 13.8 million acre-feet of water
used in the state in 2010, according
to the latest TWDB Water Use Survey
information available.

13. PROJECTED WATER DEMAND AND
EXISTING SUPPLIES (ACRE-FEET PER YEAR)
25,000,000
Demand
20,000,000
Supply
15,000,000
10,000,000
5,000,000
0
2010 2020 2030 2040 2050 2060

14. Groundwater supplies are projected to
decrease 30 percent, from about 8
million acre-feet in 2010 to about 5.7
million acre-feet in 2060.

15. PROJECTED GROUNDWATER SUPPLIES AND AVAILABILITY

16. Number of counties with Changes in Availability between
2007 State Water Plan and 2011 Regional Water Plans:
Decrease of less
Decrease of than 1,000 acre-feet Increase of
more than per year or increase more than
1,000 acre-feet of less than 1,000 1,000 acre-
Decade per year acre-feet per year feet per year
2010 20 170 64
2020 22 169 63
2030 22 169 63
2040 23 170 61
2050 26 169 59
2060 29 170 55

17. RECOMMENDED WATER MANAGEMENT STRATEGIES (2060)

18. GROUNDWATER STRATEGIES
Installing new or supplemental wells
Increasing production from existing wells
Temporarily over-drafting aquifers to
supplement supplies
Transferring groundwater supplies from
areas where projections indicate that surplus
groundwater will exist to areas with needs

19. GROUNDWATER STRATEGIES
Groundwater management strategies
recommended in the 2011 regional water
plans total 254,057 acre-feet in 2010,
increasing to 800,795 acre-feet in 2060.
Recommendations for groundwater
desalination of 56,553 acre-feet in 2010
and 181,568 acre-feet in 2060 result in a
total of 310,610 acre-feet of groundwater
in 2010 and 982,363 acre-feet in 2060.

20. TOTAL CAPITAL COSTS OF THE 2012 STATE WATER PLAN

21. SOCIOECONOMIC IMPACTS OF NOT MEETING NEEDS
Lost income: Lost jobs:
• $12 billion in 2010 • 115,000 in 2010
• $116 billion in 2060 • 1 million in 2060
Lost state and local Lost population
business taxes: growth:
• $1 billion in 2010 • 1.4 million in 2060
• $10 billion in 2060
21

22. CURRENT PLANNING CYCLE
2011 TO 2017

23. CURRENT PLANNING TASKS
1 Description of Region
2 Projected Populations & Water Demands
3 Existing Water Supply Analysis
4 Water Management Strategies (WMSs)
5 Impacts of Selected WMSs on Key parameters of Water Quality &
Moving water from Rural & Ag areas
6 Water Conservation & Drought Management Recommendations
7 Consistency with Long Term Protection of the State’s Water
Resources, Agricultural Resources, and Natural Resources
8 Unique Stream Segments and Reservoir Sites and Legislative
Recommendations
9 Infrastructure Financing Recommendations
10 Public Participation and Adoption of Plan

24. ESTIMATED SCHEDULE

25. MANAGED AVAILABLE GROUNDWATER IMPACTS
Planning groups now required to use modeled
available groundwater (MAG) volumes to
determine water supply needs in their regions.
MAGs will be in planning database in next month,
and planning groups working through spring 2012
on allocating existing supplies to water user
groups.
Some groundwater availability estimates may be
lower than the regional water planning group’s
groundwater availability estimates in prior
regional plans, impacting the amount of water
supply needs and strategies in the plans.

26. MANAGED AVAILABLE GROUNDWATER IMPACTS
Existing water supplies
Water supply needs
Water management strategies

27. PLANNING TIMELINE
Initially prepared plans (IPP): March
2015
Comment period on IPP: 120 days
Planning groups adopt and submit
final plans: Sept 2015
Approval of plans by TWDB Board:
fall 2015
State Water Plan due: January 5, 2017

28. QUESTIONS?
Carolyn Brittin
Carolyn.Brittin@twdb.texas.gov
www.twdb.texas.gov