Characteristics of hydrochemical and d2H, d18O stable isotopic composition to study saltwater intrusion in coastal aquifers in Danang city

  • Affiliations:

    1 Hanoi University of Mining and Geology, Hanoi, Vietnam
    2 Institute for Nuclear Sciences and Technology, Hanoi, Vietnam

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  • Received: 12th-Dec-2022
  • Revised: 27th-Mar-2023
  • Accepted: 11st-Apr-2023
  • Online: 30th-Apr-2023
Pages: 1 - 9
Views: 882
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Abstract:

The situation of saltwater intrusion in coastal aquifers in Da Nang city is greatly affected by urban planning, exploitation and water resources use. This article presents research data on hydrogeochemical characteristics and stable isotope composition, thereby determining the origin of groundwater in aquifers then study on saltwater intrusion. The relationship between δ2H and δ18O during rainy season shows that the water in the Holocene aquifer in Da Nang coastal area has isotopic composition similar to regional meteorological water and does not mix with seawater, the main source recharges to the aquifer is rainwater. During dry season, d18O in groundwater is low but d2H is enriched by recharged rainwater from higher attitude area and also affected by exchange with leakage water from landfills. The saline water in this aquifer tends to be washed by rainwater leading to the phenomenon of paleness and the area of salt water in the aquifer is gradually shrinking. These research results are very important in propose a solution for ground water extraction plan and control saltwater intrusion for groundwater

How to Cite
Nguyen, T.Bach, Dang, N.Duc and Dao, B.Duc 2023. Characteristics of hydrochemical and d2H, d18O stable isotopic composition to study saltwater intrusion in coastal aquifers in Danang city (in Vietnamese). Journal of Mining and Earth Sciences. 64, 2 (Apr, 2023), 1-9. DOI:https://doi.org/10.46326/JMES.2023.64(2).01.
References

Adriano, M, Nguyen, B. T.,and Olivier, B. (2016). Using radon-222 to study coastal groundwater/surface-water interaction in the Crau coastal aquifer (southeastern France). Hydrogeology Journal, 24, 1775-1789.

Blound, C. W., Price L. C. (1982). Solubility of methane in water. A laboratory study. Final Report for the period from Apr 1, 1978 to 30 Jun, 1982. Dept of Geology, Idaho State University. Report No. DOE/ET/12145-1.

Clark, I. D. and Fritz, P. (2013). Environmental Isotopes in Hydrogeology. Lewis Publisher, CRC Press.

Craig, H. (1961). Isotopic Variations in Meteoric Waters. Science.(1961). 133(3465): p. 1702-1703.

Đỗ, C. D., Phạm, Q. N.(2002). Báo cáo Đề tài Dự báo quy hoạch khai thác bền vững nguồn nước ngầm thành phố Đà Nẵng trên cơ sở điều tra chất lượng, trữ lượng, hiện trạng ô nhiễm và khả năng tự bảo vệ nước dưới đất. Sở Khoa học Công nghệ và Môi trường Đà Nẵng.

Ghassemi, F., Jakeman, A. J., and Nix, H. A. (1995). Salinization of land and water resources. CAB International. Wallingford, UK.

Hackley, K. C., Liu, C. L., and Coleman, D. D. (1996). Environmental isotope characteristics of landfill leachates and gases. GroundWater, 34(5). 827-836.

Hoang, H. V., Nguyen, L. V., Dang, N. D., Wagner, F., and Pham, N. Q. (2018). Hydro-geochemical characteristics of the groundwater resources in the southern part of the Red River’s Delta plain, Vietnam. Environmental earth sciences, 77, 1-21. doi https://doi.org/10.1007/s12665 -018-7857-9.

IAEA, (2002). Water and environment newsletter of the Isotope Hydrology Section. International Atomic Energy Agency (No. 16, Nov. 2002).

QCVN 09: 2015/BTNMT. (2015). Quy chuẩn kỹ thuật quốc gia về chất lượng nước dưới đất. Bộ Tài nguyên và Môi trường, Hà Nội, 2015.

Nguyễn, B. T., Cao, V. A., Nguyễn, D. T., Hoàng, T. S., and Nguyễn, V. D. (2018). Hiện trạng xâm nhập mặn nước dưới đất vùng thành phố Đà Nẵng, giải pháp khai thác hợp lý. Tạp chí Khoa học kỹ thuật Mỏ - Địa chất, 10-20.

Nguyen, B. T., and Thi, V. L. K. (2023). Integrated SWAT-MODFLOW model to study saltwater intrusion in Da Nang coastal city. In IOP Conference Series: Earth and Environmental Science (Vol. 1071, No. 1, p. 012037). IOP Publishing. DOI:10.1088/1755-1315/1071/ 1/012037.

Shi, H., and Singh, A. (2003). Status and interconnections of selected environmental issues in the global coastal zones. AMBIO. A Journal of the Human Environment, 32(2), 145-152.

Tweed, S., Leblanc, M., Cartwright, I., Bass, A., Travi, Y., Marc, V.,... and Kumar, U. S. (2019). Stable Isotopes of Water in Hydrogeology. Encyclopedia of Water, John Wiley and Sons, Inc., Hoboken. NJ, USA. 1-10.