draft - groundwater management strategy concepts · concept 4. groundwater management. green,...
TRANSCRIPT
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WWD Board MeetingOctober 16, 2018
CONCEPT
Groundwater Management Strategy
Concepts
1
DRAFT
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September Recap Alternative Management Strategy Recap Board Input/Direction Water Level Elevation Triggers Management Strategy Options
CONCEPT 2
Outline
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Pumping By Management Area Groundwater Allocation Exceedance Example of pumping operation Post-GSP
CONCEPT 3
September’s Recap
New Concept
Groundwater management when water levels in the “Green”, “Yellow” and “Red” zones
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CONCEPT 4
Groundwater ManagementGreen, Yellow, and Red Zones
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Historical Groundwater Pumping Rate (2010 - 2017) Lower Aquifer
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Management Areas
CONCEPT 5
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CONCEPT 6
Pumping by Management Area (AF)
Management Area Acres 2012 2013 2014 2015 2016 2017
CVP Allocation 40% 20% 0% 0% 5% 100%
1 15,871 0 0 0 0 0 0
2 324,684 150,950 281,200 286,300 291,300 271,200 23,900
3 66,902 64,900 87,900 95,850 90,150 85,900 11,800
4 213,736 165,200 268,950 272,900 278,600 254,900 18,300
Total 381,050 638,050 655,050 660,050 612,000 54,000
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CONCEPT 7
Management Area 2
2012 2013 2014 2015 2016 2017
Pumping (AF) 150,950 281,200 286,300 291,300 263,900 23,500
Active Well Total 206 281 323 349 370 211
Pumping (AF)/Well 733 1,001 886 835 713 111
Average Allocation/ Well 788 578 503 465 439 769
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2012 2013 2014 2015 2016 2017
Pumping (AF) 64,900 87,900 95,850 90,150 84,150 11,850
Active Well Total 84 100 104 114 124 76
Pumping (AF)/Well 773 879 922 791 679 156
Average Allocation/ Well 398 335 322 293 270 440
CONCEPT 8
Management Area 3
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2012 2013 2014 2015 2016 2017
Pumping (AF) 165,200 268,950 272,900 278,600 245,600 16,950
Active Well Total 228 279 326 367 386 199
Pumping (AF)/Well 725 964 837 759 636 85
Average Allocation/ Well
469 383 328 291 277 537
CONCEPT 9
Management Area 4
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0
100,000
200,000
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500,000
600,000
700,000
800,000
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Historical Groundwater Pumping Rate (1955-2017)
Groundwater Elevation Groundwater Pumping
Lower Aquifer
CONCEPT 10
Water Levels
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Historical Groundwater Pumping Rate (2012 - 2017) Lower Aquifer
600,000 AF
540,000 AF
480,000 AF
420,000 AF
360,000 AF
300,000 AF
240,000 AF
180,000 AF
120,000 AF
60,000 AF
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CONCEPT 11
Groundwater Pumper #1Sustainably Managing Groundwater Supply
No Actions Required
2011 2012 2013 2014 2015 2016 2017Pumping (AF) 0 1,314 7,438 9,729 7,156 7,299 484
Well Total 0 6 12 12 12 11 9
Average AF/Well 0 219 620 811 596 664 54Average Allocation/
Well 0 1,000 500 500 500 545 667
AssumptionsAcres: 12,000 GW Allocation: 0.5 AF/Acre
2011 2012 2013 2014 2015 2016 2017
Groundwater Allocation 6,000 6,000 6,000 6,000 6,000 6,000 6,000
Post-GSP Pumping 0 1,314 7,438 9,729 7,156 7,299 484Surplus/Deficit 6,000 4,686 -1,438 -3,729 -1,156 -1,299 5,516
Cumulative Total 6,000 10,686 9,248 5,519 4,363 3,064 8,580
Pre-GSP
Post-GSP
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CONCEPT 12
Groundwater Pumper #2Frequently exceeding groundwater allocation
Action• Limited Groundwater Pumping from 2013-2016
AssumptionsAcres: 5,700 GW Allocation: 0.5 AF/Acre
Pre-GSP
Post-GSP2011 2012 2013 2014 2015 2016 2017
Groundwater Allocation 2,850 2,850 2,850 2,850 2,850 2,850 2,850
Post-GSP Pumping 3 5,138 3,409 2,850 2,850 2,850 510Surplus/Deficit 2,847 -2,288 -559 0 0 0 2,340
Cumulative Total 2,847 559 - - - - 2,340
2011 2012 2013 2014 2015 2016 2017Pumping (AF) 3 5,138 6,645 5,485 4,029 3,914 510
Well Total 0 7 7 7 7 8 5Average AF/Well 0 734 949 784 576 489 102
Average Allocation/ Well 2,850 393 393 393 393 344 550
30%
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Board Input/Direction
Water Level Elevation TriggersManagement Strategy Options
Public Comment
CONCEPT 13
QUESTIONS