Environmental Assessments for Wetlands and Estuaries Management near Tidal Power Plant Using of Mass Balance Simulation

Abstract:

The closed bay formed by a tidal power plant on the west coast of Korea has caused water quality to change due to nutrient increase and salinity alternation. The nutrients of the inner bay are often kept a balance with the aid of the outflow at the mouth of the bay. Hence it is necessary to minimize the environmental effects by forecasting the potential environmental changes caused by a tidal power construction. Seasonal observations of mass balance in the inner and outer Garolim Bay were performed. The low quality nutrients released from sediments, land and river were more dominant than the nutrients released from the outer bay in the study area. It was observed that the tidal power plant construction made water exchange ratio 57%.Various mitigation strategies such as water gates were studied so that the water exchange rate can be reduced. The change in the water exchange ratio is significantly reduced as the cross-section and the number of water gates is increased. The water exchange ratio was decreased by 8%, which increased nutrients in the inner bay. Results of numerical the nutrients decreased with the 7% increase in the inflow while the decrease in outflow discharges. However, it is considered only 0.2% increase in the entire mass balance of Garolim Bay relatively inadequate to mitigate the environmental impact.

• Periodical: Applied Mechanics and Materials (Volumes 672-674)
• Pages: 453-458
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.672-674.453
• Online since: October 2014
• Authors: Bum Shick Shin*, Kyu Han Kim
• Keywords: Mass Balance, Numerical Model, Tidal Flat, Tidal Power Plant

References

[1] Smagorinsky, J. (1963). General circulation experiments with the primitive equation, Ⅰ. The basic experiment., Monthly Weather Review, 91, 99-164.

DOI: 10.1175/1520-0493(1963)091<0099:gcewtp>2.3.co;2

[2] Baker A.C., (1991), Tidal Power, Peter Peregrinus Ltd. London, United Kingdom.

[3] Hamrick, J. M., (1992). A three dimensional environmental fluid dynamics computer code: Theoretical and computational aspects. Special report, The college of William and Mary, Virginia institute of marine science, Glouceslter point, VA.

[4] Park et al., (2009), Long-term Variation and Characteristics of Water Quality in the Garolim Coastal Areas of Yellow Sea, Korea, The Korean Society of Marine Environment and safety 15(4), 315-328.

[6] Bum-Shin Shin, Kyu-Han Kim(2013), Effective tidal power generation with reduced environmental impact, Journal of Coastal Research, Special Issue No. 65, 1657-1662.

DOI: 10.2112/si65-280.1

[7] GESAMP (IMO/FAO/UNESCO-IOC/WMO/WHO/IAEA/UN/UNEP. Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection), 1990. Report of the twentieth session, Geneva, 7-11 May 1990. Rep. Stud. GESAMP, No. 41.

DOI: 10.1002/iroh.19850700321

[8] Coastal management planning system for Garolim (2006), Ministry of Maritime Affairs and Fisheries.

[9] Harmonic and nonharmonic constant (http: /www. khoa. go. kr, 2010), Korea Hydrographic and Oceanographic Administration.

[10] Environmental Impact Assessment (EIA) for Garolim tidal power plant (2011), Garolim tidal power plant co. Ltd.