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Characteristics of the stable isotopes (d 18O and dD) composition in precipitation from Bangkok, KamPhaeng-Phet and Suphanburi, Thailand |
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| รหัสดีโอไอ | |
| Creator | 1. Boonsom Porntepkasemsan 2. Wutthikrai Kulsawat 3. Phatchada Nochit |
| Title | Characteristics of the stable isotopes (d 18O and dD) composition in precipitation from Bangkok, KamPhaeng-Phet and Suphanburi, Thailand |
| Publisher | Faculty of Engineering, Khon Kaen University |
| Publication Year | 2559 |
| Journal Title | KKU Engineering Journal |
| Journal Vol. | 43 |
| Journal No. | S1 |
| Page no. | 78-80 |
| Keyword | Stable isotope (d18O and dD), D-excess, Precipitation, Average annual rainfall |
| ISSN | 0125-8273 |
| Abstract | The stable isotopic (d18O and dD) and water chemical compositions of the precipitation collected from Bangkok (BKK), Kamphaeng-Phet (KPP) and Suphanburi (SPB) in 2015 were performed. All water samples were weakly alkaline and the major ion (Cl-, SO4-2, Na+1, K+) were the same magnitude with low values. The results of isotopic measurements for BKK, KPP, and SPB shown a wide magnitude of variations ranging between -12.22 to 0.51 , -11.78 to 5.45 and -15.50 to 0.73, in d18O (?) and between -114.49 to 1.43, -86.41 to 27.29, and -81.74 to 2.79, in dD (?), respectively. Both d18O and dD decreased significantly from BKK to SPB and KPP and from cold to warm season because of the evaporation-induced isotopic enrichments. The results of this study revealed the exact relationship between d18O and dD of precipitation changes from geographical region to region which depending on local climatic conditions. The average annual rainfall of d18O and dD for BKK, KPP and SPB were indicated the same derived source of precipitations. These isotopic data provide important baseline information of the regional characteristics of d18O and dD of meteoric water including produce maps of mean annual isotopic values of precipitation in the country. |
