South East Management Area
SUSTAINABLE MANAGEMENT
RELATED TO BASIN STORAGE No groundwater development exists in the ETWD and City of Orange portions of the South East Management Area. The total volume of groundwater storage in IRWD’s portion of the South East Management Area has been estimated to be approximately 360,000 acre-feet (see Section 3.2.3). 10.1 DEFINITION OF SIGNIFICANT AND UNREASONABLE REDUCTION IN STORAGE No significant long-term reduction in groundwater storage is expected to occur in the South East Management Area because of the limited groundwater use. However, a decline in groundwater storage may be determined unreasonable if one more of the following occurred: 1. Significant loss of well production capacity. 2. Degradation of water quality that significantly impacts the use of groundwater. 10.2 DETERMINATION OF MINIMUM THRESHOLDS A minimum threshold for the reduction of groundwater storage in the South East Management Area is not anticipated since no undesirable effects have occurred in the past and are not foreseen in the future. Nevertheless, IRWD’s Lake Forest monitoring program continuously tracks water levels and groundwater quality. If water levels show a consistent decline, IRWD’s Lake Forest monitoring program would be expanded to examine any potential impacts and action would be taken to identify minimum thresholds as appropriate.
BASIN 8-1 ALTERNATIVE 2022 UPDATE
10-26 10 -1 Appendix F - 229
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