Westside Subbasin’s Draft Groundwater Sustainability Plan · Estimated Annual GSP Management,...
Transcript of Westside Subbasin’s Draft Groundwater Sustainability Plan · Estimated Annual GSP Management,...
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Westside Subbasin’s Draft Groundwater Sustainability Plan
Westlands Water District Board of Directors Serving as the Groundwater Sustainability Agency
of the Westside Subbasin October 15, 2019
DRAFT 1
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Outline
Groundwater Sustainability Agency
Basin Setting Monitoring Network Projects and Management Actions
(PMAs) Implementation Costs Governance Questions
PRELIMINARY 2
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Groundwater Sustainability Agency (GSA) Chapter 1
Sustainable GroundwaterManagement Actrequirements
Westlands Water District andFresno County are the GSAs
Required to submit andadopt GroundwaterSustainability Plan (GSP) byJanuary 31, 2020 to addressundesirable results
PRELIMINARY 3
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Notice and Communication Chapter 2
Hosted 15 Public Outreach Events Provided 43 Board Updates
PRELIMINARY 4
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Plan Area
• Western Area of theSan JoaquinGroundwater Basin
• Adjacent Subbasins:• Delta‐Mendota,• Kings,• Tulare Lake and• Pleasant Valley
• GroundwaterConditions
• Land Use• Water Supplies• Water Quaility
Chapter 2
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Basin Setting (Subsidence) Chapter 2
Land Surface
Clay and silt (aquitard)
Sand and gravel
Pre-Development Post-Development PRELIMINARY
Radar Subsidence Measurements July 2013 to March 2015
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Basin Setting (Subsidence) Chapter 2
Check 20
Check 19
Check 18
Check 17
Check 16
Check 15
PRELIMINARY 7
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PRELIMINARY
Monitoring Network (Considerations)
Sustainability Criteria
Groundwater Levels Undesirable Results Minimum Threshold Measurable Objective
Chapter 3
Groundwater Quality
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Monitoring Network (Groundwater Levels)
Monitoring Sites
Chapter 3
Land Surface Subsidence & Compaction Monitoring Sites DRAFT
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PMA No. 1 – Surface Water Deliveries Chapter 4 Total Delivered Water (taf)
PRELIMINARY 10
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PMA No. 2 ‐ Groundwater Extraction Allocation
Chapter 4
Extraction amount basedon estimated SustainableYield: Previous estimates Numerical model
Distribution on per‐ grossacre
Provisional amount: 0.45AF/acre
Provisional Aquifer‐specificallocation: 0.60 AF/acre
Carryover/bankingpermitted
Augmented through GWCredit Program
Designed to PromoteConjunctive Use
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Feasibility demonstrated in2017 pilot study
Retrofitting existing wells Report of Waste Discharge
Permit complete CEQA Review complete
PMA No. 3 – Aquifer Storage and Recovery Chapter 4
DRAFT
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PMA No. 4 – Targeted Pumping Reduction Chapter 4
Incentives to reduce pumping in sensitive areas/period Determined at start of
water contract year Subsidence areas
Alternative sources of water Pumping from unaffected
areas (Upper Aquifer) In‐lieu surface water
provided by District PMA No. 2 may be sufficient
PRELIMINARY 13
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PMA No. 5 – Recharge Basins Chapter 4
Currently in exploratoryand planning phase
Located on Districtowned land in westernportion of Subbasin
Recharge rate up to 18acre‐ft/day
Contingent ondemonstratingfeasibility
PRELIMINARY 14
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Estimated Annual GSP Monitoring Costs Chapter 5
No. Description Estimated Annual
Cost
1 Groundwater Level Monitoring $10,000
2 Water Quality Monitoring $20,000
3 Land Subsidence Monitoring $14,000
4 Administrative Personnel $170,000
5 Annual Comprehensive DWR Reporting $50,000
Total $264,000
PRELIMINARY 15
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Estimated Annual GSP Management, Administration and Other Costs
Chapter 5
No. Description Estimated Annual
Cost
1 Groundwater Metering $15,000
2 Operation and Maintenance $45,000
3 Project Management and Coordination $100,000
4 Administrative Personnel $70,000
5 Engineering & Consulting Services $20,000
6 Legal Expenses $50,000
7 Public Outreach $15,000
Total $315,000
PRELIMINARY 16
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Governance Chapter 6
Powers of the GSA Rules and Regulations Specific Powers• Replenishment• Groundwater Storage• Transfers (water, credits, allocations, stored water)• Accounting• Committee formation– Advisory Committee– Technical Advisory Committee
Variances
PRELIMINARY 17
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Next Steps
Host a workshop on October 18th at 1:30P.M.
Host a Special Board Meeting on October30th at 3:00 P.M. to receive publiccomments
Review and respond to public comments Consider adopting the GSP on December17, 2019
PRELIMINARY 18