Vern Freeman Diversion Constructed in 1991 Total Diversions (Jan 1991 - Dec 2016): 1,706,671 AF Average Annual Diversion: 65,641 AF
• 1955: El Rio Facility Constructed – OH Pipeline • Maximum Production Capacity – 60,000 AF/YR • Recharge Basins – 80 Acres
Answer questions posed by United management & Board of Directors that affect United’s future operations and planning, such as: Which of the SGMA sustainability indicators are the most restrictive to groundwater extractions Are reductions in pumping rates required to reach sustainability goals ? Can the OP and PV basins and their 7 aquifers be treated as one big “bathtub,” or are aquifer-specific management objectives needed to achieve sustainability?
Answer questions posed by United management & Board of Directors that affect United’s future operations and planning, such as: Will new water-supply development projects (e.g., pipelines, wells, treatment facilities) be needed to meet goals of the GSPs for each basin? * What are the potential fiscal impacts of reduced groundwater extractions or new infrastructure on United’s rates? * * Crucial input factors to United’s water resource master planning efforts.
HydrostratigraphicUnits (HSUs) Aquifer System Hydrostratigraphic Unit 13 Layer Model Shallow Ground Surface to the bottom of Semi-Perched Aquifer 1 Semi Perched-Oxnard Aquitard 2 Oxnard Aquifer 3 UAS Oxnard-Mugu Aquitard 4 Mugu Aquifer 5 Mugu-Hueneme Aquitard 6 Hueneme Aquifer 7 Hueneme-Fox Canyon Aquitard 8 Fox Canyon Aquifer - upper 9 LAS Fox Canyon upper - basal Aquitard 10 Fox Canyon Aquifer - basal 11 Santa Barbara and/or other Formation - upper 12 Grimes Canyon Aquifer 13 Deep Older sedimentary rocks and Conejo Volcanics Boundary
02N22W23B02S 100 80 60 40 20 0 nearing 2/18/1982 8/11/1987 1/31/1993 7/24/1998 1/14/2004 7/6/2009 12/27/2014 6/18/2020 -20 the point where it will be ready for use -40 -60 -80 02N22W26E01S 80 its overall ability to simulate historical 60 fluctuations 40 20 0 2/18/1982 8/11/1987 1/31/1993 7/24/1998 1/14/2004 7/6/2009 12/27/20146/18/2020 -20 -40
Avoid declines below historic lows Reduction of Groundwater Storage Avoid Keep GW declines levels Surface below sea Seawater (+density) Water level (lower Intrusion above Groundwater Depletion Santa Clara future msl Elevation River) Avoid Avoid declines Land Degraded declines below sea Subsidence Water Quality below level historic (Forebay) lows
Avg. GW Total Reduction in Extractions Water Use Use (%) Scenario Description (AF/yr) (AF/yr) GW/Total No changes in 1985-2015 Base Case 99,000 143,000 0/0 pumping rates A 50% “haircut” in OP & PV (except Forebay) 61,700 105,000 38/27 75% reduction in LAS pumping B 60,600 104,000 39/27 in OP & PV (except Forebay) 100% reduction in SWIM area only C 89,300 133,000 10/7 (nowhere else) No pumping in SWIM area, D 70% reduction in LAS pumping 59,900 104,000 39/27 in OP & PV No pumping in SWIM area, E 75% reduction in LAS pumping, 69,300 113,000 30/21 50% increase in UAS pumping
Seawater Intrusion Degraded Surface Pumping Lowering Reduction of Port Mugu Water Land Water Scenario Rate (AF/yr) GW Levels Storage Hueneme Lagoon Quality Subsidence Depletion Base Case 99,000 N/A Partial No No No Partial Yes? A 61,700 N/A Yes Partial Partial Yes Yes Yes 50,000? B 60,600 N/A Yes Yes Partial Yes Yes Yes 55,000? C 89,300 N/A Partial Partial No Partial Partial Yes D 59,900 N/A Yes Yes Yes Yes Yes Yes E 69,300 N/A Yes Yes Yes Yes Yes Yes
All FCGMA Basins, as of 1985 All FCGMA Basins, All FCGMA Basins, as of 2010 equal cuts 120,000 All FCGMA Basins, OP+FB+ OP+FB+PV 100,000 focus cuts in PV only only southern OP and (est.) PV 80,000 OP+FB+PV <65,000 60,000 OP+FB+PV only (est.) 40,000 20,000 FCGMA, 1985, GW Mgmt. Plan FCGMA, 2007, GW Mgmt. Plan update UWCD & CMWD, 2012, Preliminary UWCD, 2016, Proposed method for Draft Yield Analysis estimating sustainable yield
WHAT WE LEARNED
Saticoy Groundwater Recharge Basins Freeman Diversion (Saticoy, Rose, Noble, Ferro) Moss Screen ALT. C PV Pipeline ALT. D El Rio PV Reservoir WTP PT Reservoir Oxnard RWBS O-H Pipeline PTP System PVCWD System Camrosa ALT. A System Oxnard Hueneme Rd. ALT. B (includes ALT. A) Pipeline Phase 1 22 DO NOT COPY OR DISTRIBUTE – INTERNAL USE ONLY
State Water Interconnect Project: Overall Alignment Alternatives
Site Layout Coastal For 20,000 Brackish Water AFY Facility Treatment Plant Sand Separators, Cartridge Filters, and RO Trains for 20,000 AFY Facility
Coastal Brackish Water Treatment Plant 20,000 AFY Uses sea-water impacted groundwater Irrigation water Emergency potable supply Brine to SMP
Anacapa Project ??? AFY (still in concept phase) Extract GW from area with typically higher GW elevations Monitoring Harvest GW before lost Wells Possible deliveries to PTP, off-shore PVCWD, municipal, or Simple construction – recharge wells, pumps, & pipelines Extraction Well Field
• ∞ AWPF = 10,000 AF • ∞ Conejo Creek = 2,000 AF • ∞ BWTP = 20,000 AF • ∞ Anacapa = 3,000 -5,000 AF • ∞ StateWater = 20,000AF TOTAL 55-57 ,000AF
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