VARIATION OF WATER QUALITY IN NHA TRANG BAY

Phan Minh Thu, Nguyen Trinh Duc Hieu, Pham Thi Phuong Thao

Abstract


Based on survey data in the period of 2013 - 2015 and historical data between 1996 - 1998, the paper showed the variation of water quality parameters by time. The concentration of total suspended sediment, chlorophyll-a, dissolved inorganic nitrogen, dissolved inorganic phosphorus and ratio of N:P changed significantly by season. The results of assessing water quality by UNTRIX (integrated concentration of Chlorophyll-a, dissolved inorganic nitrogen, dissolved inorganic phosphorus and level of saturated oxygen) indicated the quality levels were increased from meso-eutrophication in 1996 (average UNTRIX: 4.54 ± 0.76) to oligo-eutrophication in the period of 2013 - 2015 (average UNTRIX from 2.62 ± 0.66 to 3.81 ± 0.45).

Keywords


Nha Trang bay, water quality.

Full Text:

PDF

References


Lê Thị Vinh, Dương Trọng Kiểm, Nguyễn Hồng Thu, Phạm Hữu Tâm, Phạm Hồng Ngọc, 2007. Một số vấn đề về môi trường nước ở thành phố Nha Trang. Tuyển tập Báo cáo Hội nghị Quốc gia “Biển Đông - 2007”, 12-14/9/2007. Tr. 307-322.

Linh, V. T. T., Kiem, D. T., Ngoc, P. H., Phu, L. H., Tam, P. H., and Vinh, L. T., 2015. Coastal Sea Water Quality of Nha Trang Bay, Khanh Hoa, Viet Nam. Journal of Shipping and Ocean Engineering, 5, 123-130.

Tam, P. H., Vinh, L. T., Kiem, D. T., Thu, N. H., Ngoc, P. H., Phu, L. H., Linh, V. T. T., 2013. Variation trend of seawater quality in the coastal beaches of Nha Trang bay. Collection of Marine Research Works, 19, 72-79.

Sở tài nguyên và Môi trường Khánh Hòa 2015. Báo cáo hiện trạng môi trường tỉnh Khánh Hòa 2011-2015.

Lã Văn Bài, 2003. Hiện trạng môi trường biển ven bờ Nam Việt Nam (1996 - 2002). Tập 11. Tuyển tập nghiên cứu biển. Tr. 37-46.

Lã Văn Bài, 2008. Diễn biến hiện trạng môi trường biển ven bờ nam Việt Nam (2002 - 2006). Tuyển tập Báo cáo Hội nghị Quốc gia “Biển Đông - 2007”, 12-14/9/2007. Tr. 503-514.

Lã Văn Bài, 2009. Diễn biến các yếu tố ô nhiễm biển ven bờ nam Việt Nam từ đất liền qua số liệu 12 năm quan trắc (1996 - 2007). Tập 16. Tuyển tập nghiên cứu biển. Tr. 40-48.

Kitsiou, D., and Karydis, M., 2011. Coastal marine eutrophication assessment: a review on data analysis. Environment International, 37(4): 778-801.

Crossland, C. J., Kremer, H. H., Lindeboom, H., Crossland, J. I. M., and Le Tissier, M. D. (Eds.), 2005. Coastal fluxes in the Anthropocene: the land-ocean interactions in the coastal zone project of the International Geosphere-Biosphere Programme. Springer Science & Business Media.

Bricker, S. B., Ferreira, J. G., and Simas, T., 2003. An integrated methodology for assessment of estuarine trophic status. Ecological modelling, 169(1): 39-60.

Vollenweider, R. A., Giovanardi, F., Montanari, G., and Rinaldi, A., 1998. Characterization of the trophic conditions of marine coastal waters, with special reference to the NW Adriatic Sea: proposal for a trophic scale, turbidity and generalized water quality index. Environmetrics, 9(3): 329-357.

Pettine, M., Casentini, B., Fazi, S., Giovanardi, F., and Pagnotta, R., 2007. A revisitation of TRIX for trophic status assessment in the light of the European Water Framework Directive: Application to Italian coastal waters. Marine Pollution Bulletin, 54(9): 1413-1426.

Hồ Hải Sâm, Nguyễn Hữu Huân, 1998. Cacbon hữu cơ hòa tan và cacbon hữu cơ lơ lửng trong vịnh Bình Cang - Nha Trang. Tập 8. Tuyển tập nghiên cứu biển. Tr. 86-97.

Federation, W. E., and American Public Health Association, 2005. Standard methods for the examination of water and wastewater. American Public Health Association (APHA): Washington, DC, USA.

Wright, S. W., Jeffrey, S. W., and Mantoura, R. F. C. (Eds.), 2005. Phytoplankton pigments in oceanography: guidelines to modern methods. UNESCO Publishing.

Jeffrey, S. W., and Welschmeyer, N. A., 1997. Spectrophotometric and fluorometric equations in common use in oceanography. Phytoplankton pigments in oceanography: guidelines to modern methods, 597-615.

Antoine, D., André, J. M., and More, A., 1996. Oceanic primary production 2: Estimation at global scale from satellite (Coastal Zone Color Scanner) chlorophyll. Global biogeochemical cycles, 10(1):

-69.

Guildford, S. J., and Hecky, R. E., 2000. Total nitrogen, total phosphorus, and nutrient limitation in lakes and oceans: Is there a common relationship?. Limnology and Oceanography, 45(6): 1213-1223.

Justić, D., Rabalais, N. N., Turner, R. E., & Dortch, Q., 1995. Changes in nutrient structure of river-dominated coastal waters: stoichiometric nutrient balance and its consequences. Estuarine, Coastal and Shelf Science, 40(3): 339-356.

Twomey, L., and Thompson, P., 2001. Nutrient limitation of phytoplankton in a seasonally open bar‐built estuary: wilson inlet, Western Australia. Journal of Phycology, 37(1): 16-29.

Howarth, R. W., and Marino, R., 2006. Nitrogen as the limiting nutrient for eutrophication in coastal marine ecosystems: evolving views over three decades. Limnology and Oceanography, 51(1part2): 364-376.

Abell, J. M., Özkundakci, D., and Hamilton, D. P., 2010. Nitrogen and phosphorus limitation of phytoplankton growth in New Zealand lakes: implications for eutrophication control. Ecosystems, 13(7): 966-977.




DOI: https://doi.org/10.15625/1859-3097/16/2/7235 Display counter: Abstract : 196 views. PDF : 525 views.


Editorial Office:

Vietnam Journal of Marine Science and Technology

1st Floor, A16 Building, 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam

Tel: (+84) 024 3791 7411

E-mail: jmst@vjs.ac.vn