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Title: Overpumping leads to California groundwater arsenic threat

Journal Article · · Nature Communications

Water resources are being challenged to meet domestic, agricultural, and industrial needs. To complement finite surface water supplies that are being stressed by changes in precipitation and increased demand, groundwater is increasingly being used. Sustaining groundwater use requires considering both water quantity and quality. A unique challenge for groundwater use, as compared with surface water, is the presence of naturally occurring contaminants within aquifer sediments, which can enter the water supply. Here we find that recent groundwater pumping, observed through land subsidence, results in an increase in aquifer arsenic concentrations in the San Joaquin Valley of California. By comparison, historic groundwater pumping shows no link to current groundwater arsenic concentrations. Our results support the premise that arsenic can reside within pore water of clay strata within aquifers and is released due to overpumping. We provide a quantitative model for using subsidence as an indicator of arsenic concentrations correlated with groundwater pumping.

Research Organization:
Stanford Univ., CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0016544
OSTI ID:
1511430
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 107 works
Citation information provided by
Web of Science

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Cited By (4)

Monitoring Groundwater Change in California’s Central Valley Using Sentinel-1 and GRACE Observations journal October 2019
Modeling Land Subsidence Using InSAR and Airborne Electromagnetic Data journal April 2019
Adsorption of ng L −1 -level arsenic by ZIF-8 nanoparticles: application to the monitoring of environmental water journal January 2018
Domestic well reliability: evaluating supply interruptions from groundwater overdraft, estimating costs and managing economic externalities journal February 2019

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