reduction was held at 5%. Based on this historic drought trend analysis, the demands for the period 2026 to 2030 were adjusted as follows: • Total Water Use – Potable (Year 1: 2026) Water demands for ”Year 1” of the drought were calculated using FY2024-2025 actual water use data ( DWR Table 4-1) and adjusted for a single dry year increase of 5% since it would be the first year of drought. • Total Water Use – Potable Values (Years 2027-2030): Subsequent year over year demand changes are as follows: 1% increases for 2027 and 2028, 1% decrease for 2029, and a 5% decrease for 2030 B. Total Supplies Water Supply values for Year 1 (2027) were calculated using actual supplies from DWR Table 6-8 and adjusted for a single dry-year change (expected 1% decrease in total supplies for potable water). There were no additional changes made to supplies in subsequent dry years (2027-2030) with or without drought conditions. As described in Section 7.2, other than a 1% decrease in local surface water supplies, there are no foreseen interruptions in imported or groundwater supplies within the next five years (2027- 2030). Metropolitan and OCWD project having sufficient supply to meet demands over the next five years under both normal and drought conditions. The Metropolitan DRA demonstrates surplus supply over the five-year period. In addition, the water supply values in IRWD’s DRA do not consider supplemental supplies stored in IRWD’s Water Bank that would also be available for use during an extended period of drought.
7 - 14
IRWD – 2025 Urban Water Management Plan
Powered by FlippingBook