Author(s): M. O. Lee; S. J. Park
Linked Author(s):
Keywords: Quatic environment; Wind stresses; Oyster farms; Seawater behaviors; Oxygen deficient water masses
Abstract: A two-dimensional numerical experiment has been conducted in order to elucidate the influence of wind stresses on the flow and water quality in a semi-enclosed shallow bay. In the summer (wind: 202.5°, 3.7 m/s), the flow became stronger than in the case of no wind, although the whole pattern of the flow looked similar to the case of no wind. In the autumn (wind: 45.0°, 4.3 m/s), the whole flow appeared to be much stronger than in any other season and in particular, a pair of anticlockwise and clockwise vortices were created in the northwest region. Consequently, the wind in the autumn seemed beneficial not only to relieve the water pollution but also to grow oysters, since the flow is much more energetic. In the winter (wind: 315°, 5.6 m/s), a southward flow appeared to dominate over the entire coastline, except for some minor eddies around islands. In the summer DO holds concentrations of 0～6 ppm but oxygen deficient water masses, having DO concentrations of less than 2 ppm, appeared to cover the middle-northern part of the bay. In the case of no wind in the autumn DO holds concentrations of 1～8 ppm but instead, oxygen deficient water masses exist in a very limited area of the northwest in the bay. During northeasterly wind, DO holds concentrations of 3～8 ppm and the distribution of DO tended to more decreased toward the east coast. Also, oxygen deficient water masses completely disappeared in the northwest area of the bay, although the entire distribution of DO is similar to the case of no wind. In the winter DO distributes with concentrations of 7～10 ppm and shows a similar pattern, independent of wind stresses.
Year: 2003