This study shows the role of waves, tide, storm surge and river discharge which impact on water level variation in Suyeong bay. Suyeong bay has a narrow inlet channel where is flood dominance caused by rainfall. The effect of typhoons which make a serious

Boussinesq 모형을 이용하여 규칙파 조건(Regular wave condition)에서 파랑변형 및 해빈류의 수치모의를 하였다. 파랑변형의 수치결과는 선행 연구에 의한 수리실험 결과와 비교하여 매우 좋은 일치를 보였으며, 검증한 파랑변형 결과를 바탕으로 충분히 안정한 상태 이후의 해빈류를 계산하여 예측하였다. 모형의 현장 적용성을 위해, 실규모해역에서 관측한 선행 연구의 현장자료와 비교하였으며, 파랑변형의 수치결과는 현장자료와 비교적 양호한 일치를 보였다. 해빈류의 수치결과는 연안사주가 발단된 지역에서 다소 과소평가 되었지만, 전반적으로 해빈류의 공간적 분포에 대하여 정도 있게 예측한 것으로 여겨진다.

This study examines experimentally and theoretically, the wave deformation by two large cylindrical structure in relation to the case of one structure. The wave height around the structures varies, according to the changes of the incident wave angles, the number of the structure, and the distances between the two structures. The wave deformation around the large cylindrical structures is shown to be well predicted theoretically by the diffraction theory based on the singular point distribution method using a vertical line wave source Green's function.

To design a coastal structure in the nearshore region, engineers must have means to estimate wave climate. Waves, approaching the surf zone from offshore, experience changes caused by combined effects of bathymetric variations, interference of man-made structure, and nonlinear interactions among wave trains. This paper has attempted to find out the effects of two of the more subtle phenomena involving nonlinear shallow water waves, amplitude dispersion and secondary wave generation. Boussinesq-type equations can be used to model the nonlinear transformation of surface waves in shallow water due to effects of shoaling, refraction, diffraction, and reflection. In this paper, generalized Boussinesq equations under the complex bottom condition is derived using the depth averaged velocity with the series expansion of the velocity potential as a product of powers of the depth of flow. A time stepping finite difference method is used to solve the derived equation. Numerical results are compared to hydraulic model results. The result with the non-linear dispersive wave equation can describe an interesting transformation a sinusoidal wave to one with a cnoidal aspect of a rapid degradation into modulated high frequency waves and transient secondary waves in an intermediate region. The amplitude dispersion of the primary wave crest results in a convex wave front after passing through the shoal and the secondary waves generated by the shoal diffracted in a radial manner into surrounding waters.