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South Oxnard Plain Area11 12 13 1402N21W 34D02 01N21W 07H01 01N21W 19L12 01N21W 32Q06NW Pleasant Valley, LAS South Oxnard Plain, UAS South Oxnard Plain, UAS South Oxnard Plain, UAS1501N21W 32Q04South Oxnard Plain, LAS15015015015015000000-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-150 -1940 1960 1980 2000 2020 204015015015015015000000-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 204015015015015015000000-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 204015015015015015000000-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040-1501940 1960 1980 2000 2020 2040Figure 6-27Historical and SimulatedGroundwater LevelsPhase 2City of Oxnard G R E AT P rogramE102003015SCO176466.GP.06 OGXL14a.ai 12/03
7.0 Summary and ConclusionsThis section provides a summary and conclusions for the evaluation of the groundwaterelevation changes for the Phase 1 and Phase 2 scenarios of the GREAT Program. The generalelements the scenarios for each of these phases are similar and both consist of the following:• In-Lieu Groundwater Recharge using Recycled Water• Direct Injection Groundwater Recharge using Recycled Water• Groundwater Recovery for Potable UseHowever, the quantities of recycled water that were recharged to groundwater (eitherthrough in-lieu or direct injection) and equivalent quantities of groundwater recovered forpotable use are much smaller for the Phase 1 than for Phase 2. This is consistent with theobjectives of Phase 1 and Phase 2 for the GREAT Program, which are to:• Phase 1: Maximize the use of existing facilities to meet current water supply deficits• Phase 2: Expand Phase 1 facilities and build new Phase 2 facilities to meet the projectedwater supply needs of the City (based on planned growth) in 2020.As summarized below, the quantities of water recharged and recovered were approximately6.85 to 7.60 times higher for the Phase 2 scenarios than for Phase 1.Quantities of Recharged and Recovered WaterRecharge MechanismPhase 1(AFY)Phase 2(AFY)Phase 2/Phase 1In Lieu Recharge Only (1a, 1b – 2a, 2b) 2,814 19,286 6.85 xDirect Injection 534 6,172 —In Lieu Recharge + Direct Injection (1c – 2c, 2c2) 3,348 25,458 7.60 xThe changes in groundwater elevations in response to implementing the Phase 1 andPhase 2 scenarios, along with the impacts from those groundwater elevation changes, wereproportional to these quantities of water that were recharged and recovered.7.1 Phase 1 Scenarios7.1.1 Groundwater Recharge Using Recycled WaterIn addition to creating a new source of potable water supply for the City by maximizing theuse of current facilities, implementing the GREAT Program elements of the Phase 1scenarios will have the following benefits:• Scenarios 1a and 1b will result in small increases in groundwater elevations over broadareas across the southern Oxnard Plain and Pleasant Valley areas as a result ofdelivering recycled water to growers (Ocean View pipeline and PTP system) in lieu ofW112003002SCO LW1458.DOC/ 033390002 95
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CONTENTS6.2.2 Base Case and Phase 1
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CONTENTSFiguresSection 1.0 - Introd
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AcronymsACPAFYASRAWTFBasin PlanbgsB
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1.0 IntroductionThis Technical Repo
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WATER RESOURCES TECHNICAL REPORT•
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SANTA BARBARACOUNTYSanta BarbaraVEN
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WATER RESOURCES TECHNICAL REPORT2.2
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Figure 2-1Groundwater Basins and th
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Figure 2-3Groundwater Basins andUWC
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604020Precipitation (inches)0-20189
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Note: Generalized surficial geology
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(a) Groundwater Elevation Monitorin
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Figure 2-11DWR 1976Schematic CrossS
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02N22W12R01S02N22W22M04SVineyard Av
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Figure 2-15USGS Groundwater LevelHy
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Figure 2-17USGS Groundwater LevelHy
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(a) Groundwater Elevations, LAS, Sp
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(a) Total Dissolved Solids, UAS, 20
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(a) Chloride Concentrations, Oxnard
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Figure 2-25Subsidence onthe Oxnard
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WATER RESOURCES TECHNICAL REPORTAgr
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TABLE 3-2City Blended Water Quality
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TABLE 3-4Agricultural Water Supply
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Figure 3-1NNo ScaleOxnard Plain Wat
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Figure 3-3Santa Clara RiverFlow and
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Figure 3-5Agriculture andPumping al
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Figure 3-7Agriculture and Pumpingal
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50,00045,00040,00035,000Supply and
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Acre-Feet6,0005,0004,0003,0002,0001
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Hwy 101 - Ventura FwyCamarilloVentu
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101 FreewayVentura RoadCaminoDel So
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WELL#21WELL#22WELL#20WELL #23BLENDI
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5.0 Historical Groundwater Flow Mod
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WATER RESOURCES TECHNICAL REPORTcli
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WATER RESOURCES TECHNICAL REPORT−
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SANTA BARBARACOUNTYSanta BarbaraVEN
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6.0 GREAT Program Groundwater FlowM
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Page 174 and 175: North Oxnard Plain Area6 7 8 901N22
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Page 182 and 183: 01005070601601201108070906050210180
Page 184 and 185: 70140509070601040501020901101401701
Page 186 and 187: Oxnard Forebay Area1 2 3 402N22W 12
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