Journal of Nuclear Science, Engineering and Technology (JONSAT)
In cooperation with the Iranian Nuclear Society

Evaluation of Isotope Hydrology in Wetlands in North of Iran and Grouping of them by Principal Component Analysis

Document Type : Research Paper

Authors

Mir Ahmad Mousavi Shalmani
Reza Khorasani
Nejat Pirvali Beiravand
Vali Feiziasl
Korosh Kamali
Ebrahim Moghiseh
Nazanin Pourmohammad
Abstract
 In order to assess the isotope hydrology in different water reservoirs in the north of Iran and to group them in relation to different chemical and physiographical parameters on catchment scale, an extensive study was conducted during 2010 to 2011 in 30 different wetlands. The samples were collected at three different seasons and analyzed for chemical and isotopic components. The isotopic data show that the selected wetlands cover a wide range of isotopic signatures, affected by climate, hydrology and local seasonal parameters. In most wetlands, the isotopic signatures in winter were lower than these in other seasons. The amount of deuterium excess was decreased from winter to spring by 12.86‰ to 0.83‰. These downward trends were continued during the spring to summer by 0.83‰ to -2.89 ‰. The results of principal components analysis (PCA) indicate that there are eight significant justifiable components with eigenvalue more than one which could describe differences between ponds (by 72%) in catchment scale in our experiment. The data showed that there is a significant decrease in d-excess during spring and summer in ponds 20, 21, 22, 24, 25 and 26 indicating the presence of light isotopes in these ponds. Physical separation of 18O and 2H by water molecules and prevalence of 2H in the movements led to increment of d-excess in most wetlands. This has led to d-excess of pond 12 even greater in summer than in winter. This could be an acceptable reason for ponds 25 and 26 (Siyahkal county) with the highest amount of d-excess and the lowest amounts of 18O and 2H. It seems that light water pumped from groundwater wells with minor source of salt (originated from sea deep percolation) into the ponds, may be another reason for the significant decrease in the heavy isotopes of water (18O and 2H) as for the ponds 2, 12, 14 and 25 from spring to summer.
 
 

Keywords

Isotope Hydrology
Wetlands
Principal Component Analysis
18O
2H
Grouping
1. I.L. Leontiadis, S. Vergis, Th. Christodoulou, Isotope hydrology study of areas in Eastern Macedonia and Thrace, Northern Greece, Journal of Hydrology, 182 (1996) 1-17.
2. G. Vandenschricka, B. Van Wesemaela, E. Frota, A. Pulido-Boschb, L. Molinab, M. Stie´venardc, R. Souchezd, Using stable isotope analysis (δD–δ18O) to characterise the regional hydrology of the Sierra de Gador, south east Spain, Journal of Hydrology, 265 (2002) 43–55.
3. J. Kværner, B. Kløve, Tracing sources of summer streamflow in boreal headwaters using isotopic signatures and water geochemical components, Journal of Hydrology, 331 (2006) 186–204.
4. W. D’ Alessandroa, C. Federicoa, M. Longoa, F. Parellob, Oxygen isotope composition of natural waters in the Mt Etna area, Journal of Hydrology, 296 (2004) 282–299.
5. N. Ogrinc, T. Kanduc, W. Stichler, P. Vrecˇa, Spatial and seasonal variations in d18O and dD values in the River Sava in Slovenia, Journal of Hydrology, 359 (2008) 303–312.
6. P. Vrecˇa, I. Krajcar Bronic, N. Horvatincˇic, J. Baresˇic, Isotopic characteristics of precipitation in Slovenia and Croatia: Comparison of continental and maritime stations, Journal of Hydrology, 330 (2006) 457–469.
7. C. Jonsson, M. Leng, G. Rosqvist, J. Seibert, C. Arrowsmith, Stable oxygen and hydrogen isotopes in sub-Arctic lake waters from northern Sweden, Journal of Hydrology, 376 (2009) 143–151.
8. L.I. Wassenaar, P. Athanasopoulos, M.J. Hendry, Isotope hydrology of precipitation, surface and ground waters in the Okanagan Valley, British Columbia, Canada, Journal of Hydrology, 411 (2011) 37–48.
9. IAEA. Use of isotope and radiation methods in soil and water management and crop nutrition, Training Course Series, 14 (2001) 129-134.
10. SWRI (Soil and Water Research Institute of Iran), Guideline for laboratory analysis of soil and water samples, Ministry of Agriculture, Vice Presidency for Planning and Supervision Publication, 467 (2010) 255.
11. J.E. Christiausen, E.C. Olsen, L.S. Willardson, Irrigation water quality. J. Irrigation and Drainage Div., ASCE. 103 (1977) 155-169.
12. G. Fipps, Irrigation water quality standards and salinity management strategies, Texas Cooperative Extension, The Texas A&M University System, Bulletin No. 1667., 4-03; Extension publications can be found on the Web at: http://tcebookstore.org (1995).
13. C. Kirda, Assessment of irrigation water quality. Options Méditerranéennes, Sér. A /n031, 1997 Séminaires Méditerranéen (1997).
14. R.S. Ayers, D.W. Westcot, Water quality for agriculture, Food and Agriculture Organization of the United Nations-Irrigation and Drainage, 29 (1) (1985).
15. J.J. Gibson, T.W.D. Edwards, T.D. Prowse, Pan-derived isotopic composition of atmospheric water vapour and its variability in northern Canada, Journal of Hydrology, 217 (1999) 55–74.
16. M.J. Leng, A.L. Lamb, T.H.E. Heaton, J.D. Marshall, B.B. Wolfe, M.D. Jones, J.A. Holmes, C. Arrowsmith, Isotopes in lake sediments, In: Leng, M.J. (Ed.), Isotopes in Palaeoenvironmental Research, Springer, Dordretch, The Netherlands (2005) 147–176.
17. M.J. Leng, J.N. Anderson, Isotopic variation in modern lake waters from western Greenland, The Holocene, 13 (2003) 605–611.
18. M. Leng, J.D. Marshall, Paleoclimate interpretation of stable isotope data from lake sediment archives, Quaternary Science Reviews, 23 (2004) 811–831.
19. C. Chang, P.V. McCormick, S. Newmanb, E.M. Elliott, Isotopic indicators of environmental change in a subtropical wetland, Ecological Indicators 9 (2009) 825-836.
20. H. Craig, Isotopic variations in meteoric waters, Science, 133 (1961) 1702–1703.
21. W. Dansgaard, Stable isotopes in precipitation, Tellus, 16 (1964) 436–468.
22. E. Saulnier-Talbot, M.J. Leng, R. Pienitz, Recent climate and stable isotopes in modern surface waters of northernmost Ungava Peninsula, Canada, Canadian Journal of Earth Sciences, 44 (2007) 171–180.
23. J.R. Gat, Oxygen and hydrogen isotopes in the hydrologic cycle, Annual Review of Earth & Planetary Sciences, 24 (1996) 225–262.
24. K. Froehlich, J.J. Gibson, P. Aggarwal, Deuterium excess in precipitation and its climatological significance, In: Study of Environmental Change using Isotope Techniques, C&S Papers Series 13/P. International Atomic Energy Agency, Vienna (2002) 54–65.
25. W.G. Darling, J.C. Talbot, The O & H stable isotopic composition of fresh waters in the British Isles. 1. Rainfall. Hydrology and Earth System Sciences, 7 (2003) 163-181.

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