Management Area Description
430
410
GRV-RSIR (RP Elev: 430 ft msl) FPRK-YLE (RP Elev: 382.59 ft msl) SILV-YL (RP Elev: 381.84 ft msl) SCE-YLCS (RP Elev: 340.67 ft msl) EMA-AH5 (RP Elev: 309.66 ft ms)
390
370
350
330
310
290
Jan-92
Jan-02
Jan-12
Jan-22
Figure 3-3: Water Level Hydrographs of Selected Wells
3.2.2 Groundwater Beneficial Uses and Regional Pumping Patterns
The Santa Ana Canyon Management Area is within the Santa Ana Region of the California Water Boards and is subject to the Santa Ana Region Basin Plan (January 24, 2014; updated July 2014). The Basin Plan designates zones related to groundwater management. The Santa Ana Canyon Management Area is included in the Orange County Management Zone. Within this Zone, groundwater has been designated for municipal, agricultural, and industrial (service supply and process) beneficial uses. Currently, local groundwater provides primarily irrigation supply with some residential drinking water (RV Park) and domestic uses. There are 18 wells that can withdraw groundwater within the Santa Ana Canyon Management Area as shown on Figure 3-2; however, some of the wells shown are not currently being used (e.g., inactive). At the time the 2017 Alternative was prepared, some wells, namely those owned by the County of Orange to supply irrigation water to the Green River Golf Course, were not metered. OCWD worked with the County of Orange to have all their wells metered and production reported to OCWD. Prior estimates of pumping before meters were installed was on the order of 1,000 acre-feet per year (Personal Communication, Merrie Weinstock, County of Orange). Data collected in recent years shows that total production is less, averaging just over 600 acre-feet per year. As shown on Table 3-1, total groundwater production within the Santa Ana Canyon Management Area over the last 5 years has averaged just over 1,000 acre-feet per year. Table
BASIN 8-1 ALTERNATIVE 2022 UPDATE
3-5
Appendix F - 254
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