title: Regional distribution of longevity population and chemical characteristics of natural water in Xinjiang, China.
abstract: Xinjiang Province, China is recognized for the longevity of its inhabitants. To study the temporal and spatial variation of longevity region and chemical characteristics of natural water of longevity region in Xinjiang, three population censuses on county-level and 51 natural water samples from Hotan Prefecture, Xinjiang were collected and analyzed. 103 natural water samples were collected from the public papers. Population statistics on county-level showed that the number of centenarians per 100,000 inhabitants (OC) in Southern Xinjiang was 7.4(year 1990), 4.9(year 2000) and 2.1 times (year 2010) more than that of Northern Xinjiang, respectively. And distribution of the longevity index (LI%), centenarity index (CI%) and number of centenarians per 10,000 over 65 year-old subjects (UC) on county-level decreased from south to north. Natural water in Northern Xinjiang was mainly fresh soft water, and it was mainly fresh hard water and brackish hard water in Southern Xinjiang. Water quality of natural water in Northern Xinjiang was superior compare to that of Southern Xinjiang, while number of centenarians 65 year-old & over per 10,000 subjects in Northern Xinjiang were less than that of Southern Xinjiang before 2010. The research indicates that keeping on drinking water with high total hardness (TH) and Mg/Ca ratio might be good for the health.
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; University of the Chinese Academy of Sciences, Beijing 100049, China. Electronic address: liuyl.10b@igsnrr.ac.cn.
authors.forename: Yong-Lin
authors.initials: YL
authors.lastname: Liu
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: luokl@igsnrr.ac.cn.
authors.forename: Kun-Li
authors.initials: KL
authors.lastname: Luo
authors.affiliation: Penn State University-Earth and Mineral Science, State College, PA, USA.
authors.forename: Xiao-Xu
authors.initials: XX
authors.lastname: Lin
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, China.
authors.forename: Xing
authors.initials: X
authors.lastname: Gao
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; University of the Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Run-Xiang
authors.initials: RX
authors.lastname: Ni
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; University of the Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Shao-Bin
authors.initials: SB
authors.lastname: Wang
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; University of the Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Xing-Lei
authors.initials: XL
authors.lastname: Tian
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002681:China; D004784:Environmental Monitoring; D005260:Female; D006801:Humans; D008136:Longevity; D008297:Male; D014876:Water Pollution / Q000032:analysis* / Q000706:statistics & numerical data; D062066:Water Resources / Q000706:statistics & numerical data*; D014881:Water Supply / Q000706:statistics & numerical data*
keywords: Centenarians; Chemical composition of natural water; Longevity region; Northern Xinjiang; Southern Xinjiang