Water quality at Cai river mouth and Tac river mouth, Nha Trang bay (2015–2019)

Pham Hong Ngoc, Le Hung Phu, Do Anh Van, Nguyen Hong Thu, Le Trong Dung, Dao Viet Ha
Author affiliations

Authors

  • Pham Hong Ngoc Institute of Oceanography, VAST, Vietnam
  • Le Hung Phu Institute of Oceanography, VAST, Vietnam
  • Do Anh Van Resources and Environment Monitoring Center, Khanh Hoa Department of Natural Resources and Environment, Khanh Hoa, Vietnam
  • Nguyen Hong Thu Institute of Oceanography, VAST, Vietnam
  • Le Trong Dung Institute of Oceanography, VAST, Vietnam
  • Dao Viet Ha Institute of Oceanography, VAST, Vietnam

DOI:

https://doi.org/10.15625/1859-3097/17037

Keywords:

Water quality, monitoring, Cai river mouth, Tac river mouth, Nha Trang bay.

Abstract

Deltas of large rivers, especially in arid areas, have been used in ancient times for agriculture and are densely populated. In recent decades, many river deltas have been experiencing an increasing anthropogenic impact, contamination of watersheds, and marine pollution caused by the offshore extraction of hydrocarbons. Combining of these factors determines a considerable research interest in river mouth areas. This paper presents the annual monitoring data on the water environment of the two mouths of the Cai river and Tac river, Nha Trang bay, during the period 2015–2019. Statistical data showed an increase in dissolved oxygen demand (DO), biological oxygen demand BOD5, and the concentrations of ammonia, Zn and Cu. Seasonal variation revealed that most of studied parameters’ concentrations, especially nutrients, were higher in the rainy season. In contrast, the values of total suspended solids (TSS) and hydrocarbon (Cai River), and petroleum (Tac river) demonstrated a decrease. Generally, the average value of BOD5, concentrations of Cu and Pb at the Cai river mouth were lower than those at the Tac river mouth, whereas the concentration of Zn was higher. Overall, the water environment of both mouths was qualified for aquaculture and aquatic organism preservation purposes except for the case of coliform.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

References

Nguyen, A. D., Zhao, J. X., Feng, Y. X., Hu, W. P., Yu, K. F., Gasparon, M., Pham, T. B., and Clark, T. R., 2013. Impact of recent coastal development and human activities on Nha Trang Bay, Vietnam: evidence from a Porites lutea geochemical record. Coral Reefs, 32(1), 181–193.

Thu, P. M., Hieu, N. T. D., and Thao, P. T. P., 2016. Variation of water quality in Nha Trang bay. Vietnam Journal of Marine Science and Technology, 16(2), 144–150.

Thi, V. H., Huong, L. L., and Huong, L. H., 2001. The distributed characteristics of some bacteria in the Cua Be and Cai river mouths in Nha Trang. Collections of Marine Research works, 11, 175–184. (in Vietnamese).

Vinh, L. T., 2013. An overview: - Studies on environment quality in Khanh Hoa coastal area in past five years, 2007–2011. Proceedings of the International Conference on “Bien Dong 2012”, pp. 196–205. (in Vietnamese).

Ministry of Natural Resources and Environment, 2015. National techinical regulation on marinewater quality QCVN 10:2015/BTNMT. Vietnam national technical regulations. pp. 757–760. (in Vietnamese).

Ministry of Natural Resources and Environment, 1995. Water quality - Standard for quality of coastal water TVVN 5943:1995/BTNMT. (in Vietnamese).

Secretariat, A. S. E. A. N., 2008. ASEAN Marine Water Quality Management Guidelines and Monitoring Manual. Australia Marine Science and Technology Ltd. (AMSAT), Australia.

Federation, W. E., and Aph Association, 2005. Standard methods for the examination of water and wastewater. American Public Health Association (APHA): Washington, DC, USA, 21.

Vinh, L. T., Thu, N. H., Kiem, D. T., Tam, P. H., and Ngoc, P. H., 2007. Some remarks on water environment in Nha Trang city. Proceedings of National Conference “Bien Dong - 2007”. pp. 307–322. (in Vietnamese).

Downloads

Published

31-03-2022

How to Cite

Pham Hong, N., Le Hung, P., Do Anh, V., Nguyen Hong, T., Le Trong, D., & Dao Viet, H. (2022). Water quality at Cai river mouth and Tac river mouth, Nha Trang bay (2015–2019). Vietnam Journal of Marine Science and Technology, 22(1), 79–84. https://doi.org/10.15625/1859-3097/17037

Issue

Section

Articles