Journal
SCIENTIFIC REPORTS
Volume 7, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep43653
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Funding
- National Science Foundation of China [91647205]
- Ministry of Science and Technology of P.R. China [2016YFC0402701, 2016YFA0601603]
- foundation of State Key Laboratory of Hydroscience and Engineering of Tsinghua University [2016-KY-03]
- U.S. National Science Foundation [EAR-1554894]
- Division Of Earth Sciences
- Directorate For Geosciences [1554894] Funding Source: National Science Foundation
- Office Of Internatl Science &Engineering
- Office Of The Director [1427642] Funding Source: National Science Foundation
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Stable isotopes in water (e. g., delta H-2 and delta O-18) are important indicators of hydrological and ecological patterns and processes. Tap water can reflect integrated features of regional hydrological processes and human activities. China is a large country with significant meteorological and geographical variations. This report presents the first national-scale survey of Stable Isotopes in Tap Water (SITW) across China. 780 tap water samples have been collected from 95 cities across China from December 2014 to December 2015. (1) Results yielded the Tap Water Line in China is delta H-2 = 7.72 delta O-18 + 6.57 (r(2) = 0.95). (2) SITW spatial distribution presents typical continental effect. (3) SITW seasonal variations indicate clearly regional patterns but no trends at the national level. (4) SITW can be correlated in some parts with geographic or meteorological factors. This work presents the first SITW map in China, which sets up a benchmark for further stable isotopes research across China. This is a critical step toward monitoring and investigating water resources in climate-sensitive regions, so the human-hydrological system. These findings could be used in the future to establish water management strategies at a national or regional scale.
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