Groundwater Flow Modeling of the Arlington Basin to Evaluate Management Strategies for Expansion of the Arlington Desalter Water Production |
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Authors: | Fakhri Manghi Dennis Williams Jack Safely Moshrik R Hamdi |
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Affiliation: | (1) Western Municipal Water District, Riverside, CA 92508, USA;(2) Geoscience Support Services, Inc., 620 W. Arrow Highway, Suite 2000, La Verne, CA 91750, USA;(3) Institute of Agricultural Research, University of Jordan, Amman, Jordan |
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Abstract: | Water supply reliability in Southern California is facing serious problems because of reduction in the availability of water
from the State Water Project and Colorado River, drought, and growing concerns about environmental restoration. Groundwater
sources supply more than fifty-five percent of domestic demands in the Western Riverside County. Western Municipal Water District
is planning to increase water supply reliability by expanding the Arlington Desalter production which requires additional
groundwater pumping from the Arlington Basin. Western was concerned that increasing groundwater pumping will cause excessive
decline in groundwater levels, leading to decreased yields at existing Desalter wells. Three-dimensional groundwater flow
model was developed for the Arlington Basin to investigate different water management strategies. Five groundwater management
scenarios were run for a 30-year time period. The five model runs were used to determine the feasibility of the Arlington
aquifer system to supply groundwater to the Arlington Desalter over the 30-year life of the facility. Model simulation results
showed that long-term groundwater pumping from the existing Desalter wells is not sustainable without artificial recharge.
However two of the modeling scenarios which incorporated a combination of artificial recharge and new production wells, were
shown to meet the increased Desalter yield requirements as well as minimize adverse impacts. |
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