2016 DFC Planning: Status Update

Transcription

1 2016 DFC Planning: Status Update Bill Hutchison, Ph.D., P.E., P.G. Independent Groundwater Consultant TAGD Groundwater Summit August 26, 2015

2 Topics Background Status GMA 2 GMA 7 GMA 11 GMA 13

3 Joint Planning Formalized the quantification of Groundwater Availability (2005 Session) Prior to mandatory joint planning, Regional Prior to mandatory joint planning, Regional Water Planning Groups established Groundwater Availability using various methods

4 Joint Planning Desired Future Condition (DFC) Adopted by Groundwater Conservation Districts (GCD) within a Groundwater Management Area (GMA) Modeled Available Groundwater (MAG) Calculated by Texas Water Development Board

5 Groundwater Management Areas (GMAs)

6 Desired Future Condition (DFC) Quantified conditions of groundwater resources Specified time or times in the future Broad Policy Goal Drawdown Spring flow Storage volumes Updated at least every 5 years

7 Modeled Available Groundwater (MAG) TWDB calculates based on DFC Models Water budget calculations District provided data and information Will be included in GCD Management Plans To be used in permitting decisions

8 Groundwater Availability = DFC + MAG

9 Groundwater Availability = Policy + Science Groundwater Availability = DFC + MAG

10 Desired Future Condition (DFC) Quantified conditions of groundwater resources Specified time or times in the future Broad Policy Goal Drawdown Spring flow Storage volumes Updated at least every 5 years

11 TWDB Rules after 2005 Session No statutory definition of DFC TWDB added definition of DFC (quantified conditions) Resulted in the use of models Legislature later adopted TWDB s definition in 2011 legislation

12 Groundwater Availability Models (GAMs) Program started in 2000 to model all aquifers in Texas Stakeholder involvement Continuous improvement of the models Objective of models: define groundwater availability Groundwater district management plans Regional water planning group plans

13 Model Runs Simulations of changes in: Groundwater pumping and/or Drought conditions Output examples: Drawdown Spring Flows Storage Volumes

14 Model Runs Simulations of changes in: Groundwater pumping and/or Drought conditions Output examples: Drawdown Spring Flows Storage Volumes DFC

15 Model Runs Simulations of changes in: Groundwater pumping and/or Drought conditions MAG Output examples: Drawdown Spring Flows Storage Volumes

16 Desired Future Conditions Model Results Important because TWDB uses the models to calculate modeled available groundwater Data Important because models cannot provide all the answers and cannot make decisions Common Sense Important because a DFC is essentially a policy statement and needs to be rooted in practicality

17 New DFC Process Consider 9 specific factors Proposed DFC Public comments and public hearings District summary reports Final DFC Explanatory Report

18 New DFC Process Consider 9 specific factors Proposed DFC Public comments and public hearings District summary reports Final DFC Explanatory Report Before 5/1/2016

19 New DFC Process Consider 9 specific factors Proposed DFC Public comments and public hearings District summary reports Final DFC Explanatory Report Before 5/1/2016 After Proposed DFC

20 GMA 2 Aquifers Dockum Edwards-Trinity (High Plains) Edwards-Trinity (Plateau) Ogallala Pecos Valley Seymour

21 GMA 2 Progress Ogallala, ETHP, and Dockum Completed review of draft HPAS Awaiting final model files to complete initial model runs Other Aquifers No discussion to date Next meeting: October 2015

22 GMA 7 Aquifers Blaine Capitan Reef Dockum Edwards-Trinity (Plateau) Ellenburger-San Saba Hickory Igneous Lipan Marble Falls Ogallala Pecos Valley Rustler Seymour Trinity

23 GMA 7 Progress Aquifers Not Relevant for Purposes of Joint Planning (Tech Memos): Blaine Igneous Lipan Seymour

24 GMA 7 Progress Initial Model Runs Completed and Draft Tech Memos: Edwards-Trinity (Plateau) Pecos Valley Rustler Trinity

25 GMA 7 Progress Awaiting model completion for Kinney County portion of ETP Awaiting direction on approach and model Awaiting direction on approach and model use for Val Verde county (ETP model or local model)

26 GMA 7 Progress Awaiting Model Completion for Capitan Reef Dockum Ellenburger-San Saba Hickory Marble Falls Ogallala

27 GMA 7 Progress Next Meeting is November 19 Update ETP model run Initial HPAS runs Initial Llano Uplift runs Initial Kinney runs Val Verde County discussion

28 GMA 11 Aquifers Carrizo-Wilcox Gulf Coast Nacatoch Queen City Sparta Trinity Yegua-Jackson

29 GMA 11 Progress Initial model runs for Carrizo-Wilcox, Queen City and Sparta will be completed by August 31 Focused on IPP Strategies and Forestar Project Meeting on November 4, 2015 to discuss next steps

30 GMA 13 Aquifers Carrizo-Wilcox Edwards (Balcones Fault Zone) Gulf Coast Queen City Sparta Trinity Yegua-Jackson

31 GMA 13 Progress Carrizo-Wilcox, Queen City, Sparta Several model runs Preliminary explanatory report completed Working on additional model runs with IPP strategies All other aquifers No discussion to date Next meeting to be scheduled when simulations are completed

32 Questions? Bill Hutchison