급변수심에 적용 가능한 Nwogu 타입 Boussinesq 방정식

Abstract

We developed new types of Boussinesq models which extend the equations of Nwogu (1993) by considering the squared bottom slope effect. Numerical experiments were conducted for wave reflections from the Booij’s (1983) planar slope with different wave frequencies. Nwogu’s (1993) model results were accurate up to 1:1 (V:H) slope but significantly inaccurate for steep slopes. The present models results were more accurate than Nwogu’s model. Numerical experiments were also conducted for wave reflection from a Gaussian shaped trench. The resonant reflection was well predicted by all the Boussinesq models. For the case of steep slopes, Nwogu’s model significantly underestimated reflection coefficients while the present models accurately predicted reflection coefficients