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Figure 1-2: Groundwater Elevation Contours for the Principal Aquifer, June 2021 ......1-4 Figure 1-3: Available Basin Storage WY1957-58 to 2020-21 ....................................... 1-5 Figure 1-4: Basin Production and Recharge Sources, WY1999-20 to 2020-21 ...........1-7 Figure 1-5: Total Water Demands within OCWD, WY1997-98 to 2020-21...................1-8 Figure 1-6: Example Hydrographs ............................................................................ 1-11 Figure 3-1: Basin 8-1, OCWD Service Area and OCWD Management Area ...............3-4 Figure 3-2: Federal and State Lands............................................................................ 3-5 Figure 3-3: Retail Water Supply Agencies.................................................................... 3-6 Figure 3-4: Land Uses.................................................................................................. 3-7 Figure 3-5: Groundwater Elevation Contours for the Shallow Aquifer, June 2021 .......3-8 Figure 3-6: Groundwater Elevation Contours for the Principal Aquifer, June 2021 ......3-9 Figure 3-7: Groundwater Elevation Contours for the Deep Aquifer, June 2021 ......... 3-10 Figure 3-8: Groundwater Production, WY2018-19 ..................................................... 3-11 Figure 3-9: Location of Long-Term Groundwater Elevation Hydrographs .................. 3-13 Figure 3-10: Water Level Hydrographs of Wells SA-21 and GG-16 in Pressure Area3-14 Figure 3-11: Water Level Hydrograph of Well A-27/AMD-9 in Forebay Area ............. 3-15 Figure 3-12: Water Level Hydrographs of Wells SAR-1 and OCWD-CTG1 ............... 3-16 Figure 3-13: Water Level Hydrographs of Wells HBM-1 and IDM-1........................... 3-17 Figure 3-14: Groundwater Storage Change, June 2020 to June 2021 ....................... 3-18 Figure 3-15: OCWD Groundwater Basin Model Boundaries ...................................... 3-19 Figure 3-16: Regional Water Board Groundwater Management Zones ..................... 3-20 Figure 3-17: TDS in Groundwater Production Wells, ................................................. 3-22 Figure 3-18: Nitrate (as N) Levels in Groundwater Production Wells, ........................ 3-23 Figure 3-19: Groundwater Contamination Plume Locations....................................... 3-26 Figure 3-20: Orange County Coastal Gaps ................................................................ 3-27 Figure 4-1: Estimated Subsurface Inflow...................................................................... 4-2 Figure 5-1: OCWD Monitoring Wells ............................................................................ 5-2 Figure 5-2: Large and Small System Drinking Water Wells.......................................... 5-3 Figure 5-3: Private Domestic, Irrigation and Industrial Wells........................................ 5-4 Figure 5-4: SGMA Shallow Aquifer System Monitoring Well Network .......................... 5-6 Figure 5-5: SGMA Principal Aquifer System Monitoring Well Network......................... 5-7 Figure 5-6 : SGMA Deep Aquifer System Monitoring Well Network.............................. 5-8 Figure 5-7: North Basin Groundwater Protection Program Monitoring Wells ............... 5-1 Figure 5-8: South Basin Groundwater Protection Program Monitoring Wells...............5-2 Figure 5-9: Seawater Intrusion Monitoring Wells......................................................... 5-3 Figure 5-10 : Surface Water Monitoring Locations ........................................................ 5-5 Figure 5-11: Recycled Water Monitoring Wells ............................................................ 5-7 Figure 6-1: Groundwater Replenishment System ........................................................ 6-5 Figure 6-2: GWRS Final Expansion Overview ............................................................. 6-7 Figure 6-3: Historical Recharge in Surface Water Recharge System........................... 6-2
BASIN 8-1 ALTERNATIVE 2022 UPDATE
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Appendix F - 65
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