ROFI Zone (Region of Freshwater Influence) and Its Impact on Total Dissolved Solids in the Coastal District of Sukadana Kayong Utara

Zan Zibar; I Wayan Nurjaya; Robin Saputra; Alimuddin Alimuddin; Ferdy Gustian; Mohammad Sumiran Paputungan

doi:10.30871/jagi.v6i2.4595

Zan Zibar Study Program of Marine Science – Faculty of Natural Science and Marine – OSO University
I Wayan Nurjaya Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, Bogor Agricultural University, Bogor, Indonesia
Robin Saputra Study Program of Marine Science – Faculty of Natural Science and Marine – OSO University
Alimuddin Alimuddin Civil Engineering – Faculty of Engineering and Science – Ibn Khaldun University
Ferdy Gustian Meteorology, Climatology, and Geophysical Agency – Indonesia
Mohammad Sumiran Paputungan Program of Marine Science – Faculty of Fisheries and Marine Science – Mulawarman University

DOI: https://doi.org/10.30871/jagi.v6i2.4595

Keywords: ROFi, Total Disolved Solids, District of Sukadana Kayong Utara

Abstract

Coastal areas are characterized by complex dynamics between freshwater entering through the estuary from land and seawater from open water. This study aims to calculate the salinity anomaly found on the sandy coast of Mayang, estimate the number of fractions and the volume of mass transport of fresh water entering the waters through the river flow and measure the total dissolved solids (TDS) in the west season. Water mass characteristics data collection using Water Checker. The determination of 17 data collection stations is assumed to be representative in representing the overall condition of the research location. The results of the anomaly salinity calculation show the low anomalous salinity values that are distributed horizontally on the coast. The distribution of salinity as anomaly values transversely on lines 1 to 4 ranges from -1 to -15. Freshwater fraction is concentrated as far as 1.16 km from the coast of Pasir Mayang with concentration values ranging from 0.44% to 0.13%. The mass transport of fresh water in the Pasir Mayang coastal waters is 1,130 m3s -1. The value of the transport volume of fresh water depends on rainfall and the flow of fresh water through rivers and then into sea waters. The total dissolved solids at the study site at each station ranged from 7.88 ppm to 17.8 ppm.

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References

Bellafiore, D., Ferrarin, C., Braga, F., Zaggia, L., Maicu, F., Lorenzetti, G., De Pascalis, F. 2019. Coastal mixing in multiple-mouth deltas: A case study in the Po delta, Italy. Estuarine. Coastal and Shelf Science, 226, 1-15.

Bratton, J. F. 2010. The three scales of submarine groundwater flow and discharge across passive continental margins, J. Geol, 118(5), 565–575.

Cherukuru, N., Brando, V. E., Schroeder, T., Clementson, L. A., & Dekker, A. G. 2014. Influence of river discharge and ocean currents on coastal optical properties. Continental Shelf Research, 84, 188–203.

Dam V G C, Ozmidov R V, Korotenko K A and Suijlen J M. 1999. Spectral structure of horizontal water movement in shallow seas with special reference to the North Sea, as related to the dispersion of dissolved matter Journal of Marine Systems, 21, 207-228.

Effendi, H. 2003. Study of Water Quality. Canisius Publisher. Yogyakarta.

Gilbert, P S., Lee, T N and Podesta, G P. 1996. Transport of anomalous low-salinity waters from the Mississippi River flood of 1993 to the Straits of Florida Cont. Shelf Res 16, 8 p 1065-1085.

Gómez M, I., Kjerfve, B., Mariño, I., & Herrera-Silveira, J. (2014). Sources of Salinity Variation in a Coastal Lagoon in a Karst Landscape. Estuaries and Coasts, 37(6), 1329–1342.

Hoshiba, Y., Matsumura, Y., Hasumi, H., Itoh, S., Nakada, S., & Suzuki, K. W. 2019. A simulation study on effects of suspended sediment through high riverine discharge on surface river plume and vertical water exchange. Estuarine, Coastal and Shelf Science, 228, 1-11.

Hoshiba, Y., Yamanaka, Y. 2013. Along-coast shifts of plankton blooms driven by riverine inputs of nutrients and fresh water onto the coastal shelf: a model simulation. J. Oceanogr.69, 753–767.

Jamshidi, S., Bakar, N.B.A. 2012. Seasonal Variations in Temperature, Salinity and Density in the Southern Coastal Waters of the Caspian Sea. Oceanology, Vol. 52, No. 3, pp. 380–396.

Jennings, W. C., Cunniff, S., Lewis, K., Deres, H., Reineman, D. R., Davis, J., & Boehm, A. B. 2020. Participatory science for coastal water quality: freshwater plume mapping and volunteer retention in a randomized informational intervention. Environmental Science. Processes & Impacts.

Krishan, G., Rao, M. S., Kumar, C. P., Kumar, S., & Rao, M. R. A. 2015. A Study on Identification of Submarine Groundwater Discharge in Northern East Coast of India. Aquatic Procedia, 4, 3–10.

Lecher, A., & Mackey, K. 2018. Synthesizing the Effects of Submarine Groundwater Discharge on Marine Biota. Hydrology, 5(4), 60, 1-21.

Lentz, S. J., & Fewings, M. R. 2012. The Wind- and Wave-Driven Inner-Shelf Circulation. Annual Review of Marine Science, 4(1), 317–343.

Maljutenko, I., & Raudsepp, U. 2019. Long-term mean, interannual and seasonal circulation in the Gulf of Finland — The wide salt wedge estuary or gulf type ROFI. Journal of Marine Systems, 195, 1–19.

Matano R P , Palma E D. 2010. The Spindown of Bottom Trapped Plumes. Journal of Physical Oceanography. (40),1651 – 1658

Maren, V D., & Hoekstra, P. 2004. Seasonal variation of hydrodynamics and sediment dynamics in a shallow subtropical estuary: the Ba Lat River, Vietnam. Estuarine, Coastal and Shelf Science, 60(3), 529–540.

Neshyba, S., Fonseca, T. 1980. Evidence for counterflow to the West Wind Drift offSouth America. Journal of Geophysical Research 85, 4888–4892.

Nurjaya, I W. 2000. Behavior of Low Salinity Water Near The Mouth of Tokyo Bay [Disertasi].

Royer, T.C., 1979. On the effects of precipitations and runoff on coastal circulation in the Gulf of Alaska. Journal of Physical Oceanography 9, 555–563.

Rusydi A F. 2018. Correlation between conductivity and total dissolved Solids in various type of water: a review. IOP Conf. Ser.: Earth Environ. Sci. Vol. 118 : 6 pages.

Simpson J H.1997. Physical processes in the ROFI regime J. Mar. Sys. 12 p 3-15

Souza, A. J., & Lane, A. 2013. Effects of freshwater inflow on sediment transport. Journal of Operational Oceanography, 6(1), 27–31.

Soemirat. J. 2009. Environmental HealthYogyakarta : Gajah Mada University-Press Nature Vol. 466 : 47-55.

Sigman DM. 2010. The polar ocean and glacial cycles in atmospheric CO2 concentration. Nature, 466, 47-55.

Sulardi A., Nurjaya, I W., Hartanto, M T. 2019. Seasonally volume, heat, salt and freshwater transports within Balikpapan Bay to Makassar Strait. IOP Conf. Ser. Earth. Environ. Sci 429 012058.

Su J, Wang J, Pohlmann T, Xu DF. 2011. The influence of meteorological variation on the upwelling system off eastern Hainan during summer 2007–2008. Oce. Dyn. 61 (6):717–730.

Taniguchi, M., Burnett, W. C., Cable, J. E., & Turner, J. V. 2002. Investigation of submarine groundwater discharge. Hydrological Processes, 16(11), 2115–2129.

Thompson K. 2006. AWWA Research Foundation, WateReuse Foundation, & Water Quality Association. Characterizing and Managing Salinity Loadings in Reclaimed Water Systems. USA : American Water Works Association

Wang, X., Li, H., Jiao, J. J., Barry, D. A., Li, L., Luo, X., Qu, W. (2015). Submarine fresh groundwater discharge into Laizhou Bay comparable to the Yellow River flux. Scientific Reports, 5(1).

Xiong, Q., Royer, T.C., 1984. Coastal temperature and salinity in the Northern Gulf of Alaska, 1970–1983. Journal of Geophysical Research 89, 8061–8068.

Zibar Z, Nurjaya I W and Natih M N. 2018. Seasonally physical characteristics of ROFI zone (Region of Freshwater Influence) in Pelabuhan Ratu Bay IOP Conf. Ser. Earth. Environ. Sci 176 p 1-11.

Zibar Z. 2017. Seasonally physical characteristics of ROFI zone (Region of Freshwater Influence) in Pelabuhan Ratu Bay (thesis).

Zimmerman J T F. 1986. The tidal whirlpool: a review of horizontal dispersion by tidal and residual currents Netherlands Journal of Sea Research, 20, 133-154.