Linking Groundwater Quality and Quantity： An Assessment of Satellite-Based Groundwater Storage Anomalies from GRACE against Ground Measurements of Contaminants in California
Linking Groundwater Quality and Quantity： An Assessment of Satellite-Based Groundwater Storage Anomalies from GRACE against Ground Measurements of Contaminants in California作者机构：Geosciences and Environment Department California State University Los Angeles CA 90032 USA California Institute of Technology Jet Propulsion Laboratory Pasadena CA 91109 USA
出 版 物：《Journal of Environmental Science and Engineering(B)》 (环境科学与工程（B）)
年 卷 期：2012年第1卷第11期
页 面：1271-1284页
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0713[理学-生态学]
主 题：地下水质量 污染物浓度 地下水异常 地面测量 美国加州 储存 重金属浓度 卫星
摘 要：Groundwater comprises a large portion of irrigation for Californias agriculture, and sustains a wide diversity of ecosystems as well as consumptive use, but pumping is occurring faster than replenishment. At the same time, contaminants from fertilizers and pesticides are infiltrating into the groundwater, becoming increasingly concentrated as water is extracted. It compared space-based observations of groundwater anomalies from Californias San Joaquin Valley using the GRACE (gravity recovery and climate experiment) against measurements of 42 organic and inorganic chemicals from 41,667 wells in the valley from 2003 to 2010. It compared Arsenic, Boron, Cadmium, Chloride, Selenium, Trichloroethylene, and TDS (total dissolved solid) concentrations with the groundwater storage anomaly from 2003 to 2010. The results show strong correlations for groundwater depletion against increasing chloride (r2 = 0.78, p 0.05) and boron (r2 = 0.88, p 0.05). This indicates increasing contaminant concentrations while groundwater was depleting over the last eight years. Solubilization by complexation with Cl, CO3 and/or organic chelates may account for the increasing concentration of some heavy metals when groundwater depletion occurs. These results are the first to link space-based groundwater mass change with groundwater contaminant concentration change.
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