Vern Freeman Diversion Constructed in 1991 Total Diversions (Jan - - PowerPoint PPT Presentation

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,”

• r 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.

Aquifer System Hydrostratigraphic Unit 13 Layer Model Shallow Ground Surface to the bottom of Semi-Perched Aquifer 1 UAS Semi Perched-Oxnard Aquitard 2 Oxnard Aquifer 3 Oxnard-Mugu Aquitard 4 Mugu Aquifer 5 LAS Mugu-Hueneme Aquitard 6 Hueneme Aquifer 7 Hueneme-Fox Canyon Aquitard 8 Fox Canyon Aquifer - upper 9 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

HydrostratigraphicUnits (HSUs)

nearing the point where it will be ready for use its overall ability to simulate historical fluctuations

• 80
• 60
• 40
• 20

20 40 60 80 100 2/18/1982 8/11/1987 1/31/1993 7/24/1998 1/14/2004 7/6/2009 12/27/2014 6/18/2020

02N22W23B02S

• 40
• 20

20 40 60 80 2/18/1982 8/11/1987 1/31/1993 7/24/1998 1/14/2004 7/6/2009 12/27/20146/18/2020

02N22W26E01S

Reduction of Groundwater Storage Surface Water Depletion Land Subsidence Seawater Intrusion Degraded Water Quality

Groundwater Elevation

Avoid declines below historic lows Avoid declines below sea level (lower Santa Clara River) Avoid declines below historic lows Avoid declines below sea level (Forebay) Keep GW levels (+density) above future msl

Scenario Description

• Avg. GW

Extractions (AF/yr) Total Water Use (AF/yr) Reduction in Use (%) GW/Total

Base Case No changes in 1985-2015 pumping rates 99,000 143,000 0/0 A 50% “haircut” in OP & PV (except Forebay) 61,700 105,000 38/27 B 75% reduction in LAS pumping in OP & PV (except Forebay) 60,600 104,000 39/27 C 100% reduction in SWIM area only (nowhere else) 89,300 133,000 10/7 D No pumping in SWIM area, 70% reduction in LAS pumping in OP & PV 59,900 104,000 39/27 E No pumping in SWIM area, 75% reduction in LAS pumping, 50% increase in UAS pumping 69,300 113,000 30/21

Scenario Pumping Rate (AF/yr) Lowering GW Levels Reduction of Storage

Seawater Intrusion

Degraded Water Quality Land Subsidence Surface Water Depletion Port Hueneme Mugu Lagoon Base Case 99,000 N/A Partial No No No Partial Yes?

A 61,700 N/A Yes Partial Partial Yes Yes Yes B 60,600 N/A Yes Yes Partial Yes Yes Yes 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

50,000? 55,000?

20,000 40,000 60,000 80,000 100,000 120,000

FCGMA, 1985, GW Mgmt. Plan FCGMA, 2007, GW Mgmt. Plan update UWCD & CMWD, 2012, Preliminary Draft Yield Analysis UWCD, 2016, Proposed method for estimating sustainable yield

All FCGMA Basins, as of 1985 All FCGMA Basins, as of 2010 OP+FB+ PV only (est.) All FCGMA Basins, equal cuts All FCGMA Basins, focus cuts in southern OP and PV OP+FB+PV

• nly (est.)

OP+FB+PV <65,000 OP+FB+PV

• nly

WHAT WE LEARNED

22

Freeman Diversion Moss Screen El Rio WTP Saticoy Groundwater Recharge Basins (Saticoy, Rose, Noble, Ferro) O-H Pipeline PV Pipeline PTP System PT Reservoir PV Reservoir PVCWD System Oxnard RWBS Oxnard Hueneme Rd. Pipeline Phase 1

• ALT. A

Camrosa System

• ALT. C

DO NOT COPY OR DISTRIBUTE – INTERNAL USE ONLY

• ALT. B (includes ALT. A)
• ALT. D

State Water Interconnect Project: Overall Alignment Alternatives

Site Layout For 20,000 AFY Facility

Sand Separators, Cartridge Filters, and RO Trains for 20,000 AFY Facility

Coastal Brackish Water Treatment Plant

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  Harvest GW before lost

• ff-shore

 Simple construction – wells, pumps, & pipelines

Extraction Well Field Monitoring Wells Possible deliveries to PTP, PVCWD, municipal, or recharge

• ∞ 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