Impacts of pollution discharges from Dinh Vu industrial zone on water quality in the Hai Phong coastal area
Keywords:Delft3D, water quality, Dinh Vu industrial zone, Hai Phong coastal area.
The hydrodynamic and water quality models (the Delft3D model) were established based on the measured data and the estimated pollution discharges from Dinh Vu industrial zones to Nam Trieu estuary. With seven separate simulation scenarios, the results show that in case of increased wastewater with the control of pollution discharge (water and concentration), the impact of pollution is only limited to a small area around the discharge point. Their influences on water quality in other areas in Nam Trieu estuary are quite small. Meanwhile, in case of environmental risk, a strongly increasing pollution load would cause the significantly increasing pollutant concentration in this area, they have almost exceeded the value in the National Technical Regulation on surface water quality (QCVN 10-MT:2015/BTNMT), such as NH4, COD, and BOD. Dissolved oxygen in the water would also decrease significantly. The spatial influence extends from the discharge point to Nam Trieu estuary, inside Cam, Bach Dang rivers, and Cat Hai coastal area.
Skerratt, J., Wild-Allen, K., Rizwi, F., Whitehead, J., and Coughanowr, C., 2013. Use of a high resolution 3D fully coupled hydrodynamic, sediment and biogeochemical model to understand estuarine nutrient dynamics under various water quality scenarios. Ocean & Coastal Management, 83, 52–66.
Vu Duy Vinh, 2011. Some results of modelling application to research on marine environment. Proceeding of the 5th National Conference on Marine Science and Technology. Volume 5: Marine ecological, environment and management. Hanoi. pp. 475–484. (in Vietnamese).
Vu Duy Vinh, 2011. Preliminary results from applying the ecological model in the Cat Ba-Ha Long coastal area. Marine Resources and Environment, Tome 16. Publishing House for Science and Technology, Hanoi. pp. 215–229. (in Vietnamese).
Cao Thi Thu Trang, Vu Duy Vinh, 2016. Calculation of receiving capacity of pollutants in Thi Nai lagoon (Binh Dinh province). Vietnam Journal of Marine Science and Technology, 16(2), 158–166. DOI: 10.15625/1859-3097/16/2/6670.
Vinh, V. D., Ouillon, S., Thanh, T. D., and Chu, L. V., 2014. Impact of the Hoa Binh dam (Vietnam) on water and sediment budgets in the Red River basin and delta. Hydrology and Earth System Sciences, 18(10), 3987–4005.
Vu Duy Vinh, Dinh Van Uu, 2013. The influence of wind and oceanographic factors on characteristics of suspended sediment transport in Bach Dang estuary. Vietnam Journal of Marine Science and Technology, 13(3), 216–226.
Weatherall, P., Marks, K. M., Jakobsson, M., Schmitt, T., Tani, S., Arndt, J. E., ... and Wigley, R., 2015. A new digital bathymetric model of the world’s oceans. Earth and Space Science, 2(8), 331–345. doi:10.1002/2015EA000107.
Vu Duy Vinh, Do Dinh Chien, Tran Anh Tu, 2008. A 3D numerical model for water quality in Ha Long bay area. Marine Resources and Environment, Tome 13. Science and Technics Publishing House, Hanoi. pp. 318–327. (in Vietnamese).
Hartnett, M., and Nash, S., 2015. An integrated measurement and modeling methodology for estuarine water quality management. Water Science and Engineering, 8(1), 9–19. https://doi.org/10.1016/j.wse.2014.10.001. https://doi.org/10.1016/j.wse.2014.10.001.">
Wild-Allen, K., Skerratt, J., Whitehead, J., Rizwi, F., and Parslow, J., 2013. Mechanisms driving estuarine water quality: a 3D biogeochemical model for informed management. Estuarine, Coastal and Shelf Science, 135, 33–45.
Vu Duy Vinh, Nguyen Van Quan, 2015. Characteristics of hydrodynamics and flushing time in Nai lagoon (Ninh Thuan) - results based on the Delft3D. Vietnam Journal of Marine Science and Technology, 15(3), 250–256.
Vu Duy Vinh, Tran Dinh Lan, 2018. Influences of the wave conditions on the characteristics of sediment transport and morphological change in the Hai Phong coastal area. Vietnam Journal of Marine Science and Technology, 18(1), 10–26. DOI: 10.15625/1859-3097/18/1/9045.
Duy Vinh, V., Ouillon, S., and Van Uu, D., 2018. Estuarine Turbidity Maxima and variations of aggregate parameters in the Cam - Nam Trieu estuary, north Vietnam, in early wet season. Water, 10(1), 68.