Page 47 - Beaumont Basin Watermaster

Beaumont Basin Watermaster
2013 Reevaluation of the Beaumont Basin Safe Yield 3-Apr-15

resulting basin-wide pumping was fixed at 15,685 acre-ft/yr throughout the 20-yr future
projection.

7. Appropriator pumping outside the Beaumont Basin (YVWD and City of Banning) but
within the Study Area was fixed during the 20-yr projection simulation at annual rates
based on each appropriator’s respective 2010 UWMPs. Pumping for SMWC was
assumed to remain the same as 2012 pumping rates.

6.3 Findings

The water balance resulting from the analysis of future groundwater production and artificial
recharge is shown in Table 8. The analysis shows that change in groundwater storage ranges
from 294 acre-ft/yr to -379 acre-ft/yr with an average of -157 acre-ft/yr during the 10-yr planning
period (2013 – 2022). Cumulative storage change over the 10-yr period was -1,567 acre-ft.
Changes in groundwater storage over the planning period are relatively minor and reflect
balanced recharge and discharge in the basin. The Safe Yield based on the future projection
analysis under balanced recharge and discharge is approximately 6,700 acre-ft/yr.

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