2012 Fiscal Year Final Research Report
Estimation of Salt Origin of Irrigation District Using Strontium Isotope Ratio and Chemical Composition
| Project/Area Number |
22780225
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Ehime University (2012)
Research Institute for Humanity and Nature (2010-2011) |
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Principal Investigator |
KUME Takashi 愛媛大学, 農学部, 農学部 (80390714)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 灌漑排水 |
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| Research Abstract |
Salt origins of agricultural drainage water samples can be analyzed by the 87Sr/86Sr isotope ratio and chemical composition. Plots of 87Sr/86Sr vs. 1/Sr suggested that the origin of salt in drain water were irrigation water, fertilizer and fossil seawater, and analysis of a mixing model incorporating these three end-components showed that the origins of Sr in drainage differed markedly between summer and winter. Origins of sodium and calcium of the drain water were also tested using 87Sr/86Sr and Na/Sr and Ca/Sr as tracers. While quantitative analysis has been in process, environmental dynamics of sodium and calcium could be interpreted by result of strontium isotope analysis using plots of those tracers.
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