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http://dx.doi.org/10.5657/kfas.2007.40.3.167

Submarine Discharge and Geochemical Characteristics of Groundwater in the Southeastern Coastal Aquifer off Busan, Korea  

Yang, Han-Soeb (Department of Oceanography, Pukyong National University)
Hwang, Dong-Woon (School of Earth and Environmental Sciences, Seoul National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.40, no.3, 2007 , pp. 167-177 More about this Journal
Abstract
We measured the salinity, pH, and concentrations of $^{222}Rn$ and nutrients in groundwater in the southeastern coastal aquifer off Busan from March to September 2005 to evaluate its submarine discharge and geochemical characteristics. Salinity in coastal groundwater increased sharply at 20 m depth and exceeded 25 ppt below 40 m during the study period, indicating that a strong transition zone between fresh groundwater and seawater developed between 20 and 40 m depths. Fresh groundwater in the upper layer of this transition zone was characterized by high pH, $^{222}Rn$, dissolved inorganic nitrogen (DIN), and dissolved inorganic phosphorus (DIP) and low dissolved inorganic silicate (DSi) relative to seawater in the lower layer. In addition, the vertical profiles of the $^{222}Rn$, DIN, and DIP concentrations imply that a strong advective groundwater flow occurs along the interface of fresh groundwater and seawater near 20 m depth. The geochemical constituents in coastal groundwater also showed strong seasonal variation, with the highest concentrations in summer (June 2005) due to the changes of groundwater recharge and sea level. This implies that the input of terrestrial chemical species into the coastal ocean through submarine groundwater discharge (SGD) could change seasonally. To ascertain the seasonal variation of SGD and SGD-driven chemical species fluxes, and associated ecological responses in the coastal ocean, more extensive studies are necessary using various SGD tracers or seepage meters in the future.
Keywords
Submarine groundwater discharge; Nutrient; Rn; Coastal aquifer;
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1 Charette, M.A., K.O. Buesseler and J.E. Andrews. 2001. Utility of radium isotopes for evaluating the input and transport of groundwater-derived nitrogen to a Cape Cod estuary. Limnol. Oceanogr., 46, 456-470   DOI   ScienceOn
2 Corbett, D.R., J.P. Chanton, W.C. Burnett, K. Dillon, C. Rutkowski and J. Fourqurean. 1999. Patterns of groundwater discharge into Florida Bay. Limnol. Oceanogr., 44, 1045-1055   DOI   ScienceOn
3 Elhatip, H. 2003. The use of hydrochemical techniques to estimate the discharge of Ovacik submarine groundwater springs on the Mediterranean coast of Turkey. Envrion. Geol., 43, 714-719   DOI
4 Gooddy, D.C., J.W. Clay and S.H. Bottrell. 2002. Redox-driven changes in porewater chemistry in the unsaturated zone of the chalk aquifer beneath unlined cattle slurry lagoons. Applied Geochem., 17, 903-921   DOI   ScienceOn
5 Krest, J.M., W.S. Moore, L.R. Gardner and J.T. Morris. 2000. Marsh nutrient export supplied by groundwater discharge: Evidence from radium measurements. Global Biogeochem. Cycles, 14, 167-176   DOI   ScienceOn
6 Michael, H.A., A.E. Mulligan and C.F. Harvey. 2005. Seasonal oscillations in water exchange between aquifers and the coastal ocean. Nature, 436, 1145-1148   DOI   ScienceOn
7 Reilly, T.E. and A.S. Goodman. 1987. Analysis of salt water upcoming beneath a pumping well. J. Hydrol., 89, 169-204   DOI   ScienceOn
8 Robertson, W.D. 1995. Development of steady-state phosphate concentrations in septic system plumes. J. Contamin. Hydrol., 19, 289-305   DOI   ScienceOn
9 Simmons, G.M. 1982. Importance of submarine groundwater discharge (SGWD) and seawater cycling to the material flux across sediment/water interfaces in marine environments. Mar. Ecol. Prog. Ser., 84, 173-184
10 Burnett, W.C., M. Taniguchi and J. Oberdorfer. 2001. Measurement and significance of the direct discharge of groundwater into the coastal zone. J. Sea Res., 46, 109-116   DOI   ScienceOn
11 Froelich, F.N., G.P. Klinkhammer, M.L. Bender, N.A. Luedtke, G.R. Heath, D. Cullen, P. Dauphin, D. Hammond, B. Hartman and V. Maynard. 1979. Early oxidation of organic matter in pelagic sediments of the easthem equatorial Atlantic: suboxic diagenesis. Geochim. Cosmochim. Acta, 43, 1075-1090   DOI   ScienceOn
12 Lee, G.W. and H.S. Yang, 1998. Chemical Oceanography. Chung-Moon Gak, Seoul, 1-332
13 Kohout, F.A. 1966. Submarine springs: a neglected phenomenon of coastal hydrology. Hydrology, 26, 391-413
14 Bear, J., A.H.D. Cheng, S. Sorek, D. Ouazar and I. Herrera, 1999. Seawater Intrusion in Coastal Aquifer-concepts, Methods and Practices, Kluwer Academic Pub., 1-625
15 Cho, J.S., J.K. Ahn, H.C. Kim and DW. Lee. 2004. Radon concentrations in groundwater in Busan measured with a liquid scintillation counter method. J. Environ. Radioact., 75, 105-112   DOI   ScienceOn
16 Kelly, R.P. and S.B. Moran. 2002. Seasonal changes in groundwater input to a well-mixed estuary estimated using radium isotopes and implications for coastal nutrient budgets. Limnol. Oceanogr., 47, 1796-1807   DOI   ScienceOn
17 Kim, G. and D.W. Hwang. 2002. Tidal pumping of groundwater into the coastal ocean revealed from submarine $^{222}Rn$ and CH4 monitoring, Geophys. Res. Lett., 29, 2002GL015093   DOI
18 Park, G.S. 2004. Assessment of the discharge of submarine groundwater and associated chemical constituents from Jeju Island, Korea. Ph.D. Thesis, Pukyong National University, Busan, 1-139
19 Hwang, D.W., Y.W. Lee and G. Kim. 2005a. Large submarine groundwater discharge and benthic eutrophication in Bangdu Bay on volcanic Jeju Island, Korea. Limnol. Oceanogr., 50, 1393-1403   DOI   ScienceOn
20 Appelo, C.A.J. and D. Postma. 1993. Geochemistry, Groundwater and Pollution, Balkema, Rotterdam, 1-649
21 Nolan, B.T. and J.D. Stoner. 1995. Nutrients in groundwaters of the conterminous United States 1992-1995. Environ. Sci. Technol., 34, 1156-1165
22 Weiskel, P.K. and B.L. Howes. 1992. Differential transport of sewage-derived nitrogen and phosphorus through a coastal watershed. Environ. Sci. Technol., 26, 352-360   DOI
23 Zektzer, I.S., V.A. Ivanov and A.V. Meskheteli. 1973. The problem of direct groundwater discharge to the seas. J. Hydrol., 20, 1-36   DOI   ScienceOn
24 Hwang, D.W., G. Kim, Y.W. Lee and H.S. Yang. 2005b. Estimating submarine inputs of groundwater and nutrients to a coastal bay using radium isotopes. Mar. Chem., 96, 61-71   DOI   ScienceOn
25 Segol, G. and G.F. Pinder. 1976. Transient simulation of saltwater intrusion in southeastern Florida. Water Res. Res., 12, 65-70   DOI
26 Berner, R.A 1980. Early Diagenesis. Princeton University Press, Princeton, N.J., 1-241
27 Tissen, H. 1995. Phosphorus in the Global Environment, Transfers, Cycles and Management. SCOPE, Vol. 54. Wiley, New York, 1-462
28 Burnett, W.C., H. Bokuniewicz, M. Huettel, W. S. Moore and M. Taniguchi. 2003. Groundwater and pore water inputs to the coastal zone. Biogeochemistry, 66, 3-33   DOI   ScienceOn
29 Freeze, R.A. and J.A. Cherry. 1989. Ground-water. Prentice-Hall, Inc. Eaglewood Cliffd, New Jersey, 1-604
30 Rysgaard, S., P. Thastum, T. Dalsgaard, P.B. Christensen and N.P. Sloth. 1999. Effects of salinity on $NH_{4}^{+}$ adsorption capacity, nitrification, and denitrification in Danish estuarine sediments. Estuaries, 22, 21-30   DOI   ScienceOn
31 Shaban, A., M. Khawlie, C. Abdallah and G. Faour. 2005. Geologic controls of submarine groundwater discharge: application of remote sensing to north Lebanon. Environ. Geol., 47, 512-522   DOI
32 Taniguchi, M., W.C. Burnett, J.E. Cable and J.V. Turner. 2002. Investigation of submarine groundwater discharge. Hydrol. Process., 16, 2115-2129   DOI   ScienceOn
33 Zanini, L., W.D. Robertson, C.J. Ptacek, S.L. Schiff and T. Mayer. 1998. Phosphorus characterization in sediments impacted by septic effluent at four sites in central Canada. J. Contamin. Hydrol., 33, 405-429   DOI   ScienceOn
34 Li, L., D.A. Barry, F. Stagnitti and J.-Y. Parlange. 1999. Submarine groundwater discharge and associated chemical input to a coastal sea. Water Resour. Res., 35, 3253-3259   DOI
35 Moore, W.S. 1996. Large groundwater inputs to coastal waters revealed by $^{226}Ra$ enrichments. Nature, 380, 612-614   DOI
36 Shim, B.O. 2003. Characteristics of hydrodynamic seawater intrusion at the southeastern coastal area of Busan, Korea. Ph.D. Thesis, Pukyong National University, Busan, 1-123
37 Shim, B.O., S.Y. Chung, H.J. Kim, I.H. Sung and B.W. Kim. 2002. Characteristics of sea water intrusion using geostatistical analysis of geophysical surveys at the southeastern coastal area of Busan, Korea. J. Kor. Soc. Soil Groundwater Envrion., 7, 3-17
38 Lee, J.M. and G. Kim, 2006. A simple and rapid method for analyzing radon in coastal and ground waters using a radon in air monitor. J. Environ. Radioact., 89, 219-228   DOI   ScienceOn
39 Slomp, C.P. and P.V. Cappellen. 2004. Nutrient inputs to the coastal ocean through submarine groundwater discharge: controls and potential impact. J. Hydrol., 295, 64-86   DOI   ScienceOn