State Water Plan and RWPG Updates from the Groundwater Perspective, Carolyn Brittin
The State Water Plan andRegional Water Planning Group Updates from the Groundwater Perspective
REGIONAL WATER PLANNINGAND THE 2012 STATE WATER PLAN
REGIONAL WATER PLANNING: 12 INTERESTSPublic River authoritiesCounties Electric-generatingMunicipalities utilitiesIndustriesAgricultureEnvironment Water districts Water utilitiesGroundwatermanagement areas Small businesses
GROUNDWATER MANAGEMENT AREASAND REGIONAL WATER PLANNING AREAS
REGIONAL WATER PLANNING PROCESSProject future population and water demandQuantify existing and future water suppliesavailable during repeat of drought of recordIdentify surpluses and needsEvaluate and recommend water managementstrategiesMake policy recommendationsAdopt the plan Existing Projected Surplus Water Water (+) or Supplies Demand Need (-)
REGIONAL WATER PLANNING: BY THE NUMBERS16 regional water 6 water use categories planning groups12 3,000interest groups water user groups450 voting and non- 562 recommended voting planning group water management members strategies to meet needs 6
GROUNDWATER USEGroundwater provided 57 percent of the 13.8 million acre-feet of water used in the state in 2010, accordingto the latest TWDB Water Use Survey information available.
PROJECTED WATER DEMAND AND EXISTING SUPPLIES (ACRE-FEET PER YEAR)25,000,000 Demand20,000,000 Supply15,000,00010,000,000 5,000,000 0 2010 2020 2030 2040 2050 2060
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.
PROJECTED GROUNDWATER SUPPLIES AND AVAILABILITY
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
RECOMMENDED WATER MANAGEMENT STRATEGIES (2060)
GROUNDWATER STRATEGIESInstalling new or supplemental wellsIncreasing production from existing wellsTemporarily over-drafting aquifers tosupplement suppliesTransferring groundwater supplies fromareas where projections indicate that surplusgroundwater will exist to areas with needs
GROUNDWATER STRATEGIESGroundwater management strategiesrecommended in the 2011 regional waterplans total 254,057 acre-feet in 2010,increasing to 800,795 acre-feet in 2060.Recommendations for groundwaterdesalination of 56,553 acre-feet in 2010and 181,568 acre-feet in 2060 result in atotal of 310,610 acre-feet of groundwaterin 2010 and 982,363 acre-feet in 2060.
TOTAL CAPITAL COSTS OF THE 2012 STATE WATER PLAN
SOCIOECONOMIC IMPACTS OF NOT MEETING NEEDSLost income: Lost jobs:• $12 billion in 2010 • 115,000 in 2010• $116 billion in 2060 • 1 million in 2060Lost state and local Lost population business taxes: growth:• $1 billion in 2010 • 1.4 million in 2060• $10 billion in 2060 21
CURRENT PLANNING TASKS1 Description of Region2 Projected Populations & Water Demands3 Existing Water Supply Analysis4 Water Management Strategies (WMSs)5 Impacts of Selected WMSs on Key parameters of Water Quality & Moving water from Rural & Ag areas6 Water Conservation & Drought Management Recommendations7 Consistency with Long Term Protection of the State’s Water Resources, Agricultural Resources, and Natural Resources8 Unique Stream Segments and Reservoir Sites and Legislative Recommendations9 Infrastructure Financing Recommendations10 Public Participation and Adoption of Plan
MANAGED AVAILABLE GROUNDWATER IMPACTSPlanning groups now required to use modeledavailable groundwater (MAG) volumes todetermine water supply needs in their regions.MAGs will be in planning database in next month,and planning groups working through spring 2012on allocating existing supplies to water usergroups.Some groundwater availability estimates may belower than the regional water planning group’sgroundwater availability estimates in priorregional plans, impacting the amount of watersupply needs and strategies in the plans.
MANAGED AVAILABLE GROUNDWATER IMPACTSExisting water suppliesWater supply needsWater management strategies
PLANNING TIMELINEInitially prepared plans (IPP): March2015Comment period on IPP: 120 daysPlanning groups adopt and submitfinal plans: Sept 2015Approval of plans by TWDB Board:fall 2015State Water Plan due: January 5, 2017