1D–2D Numerical Model for Wave Attenuation by Mangroves as a Porous Structure

In this paper, we investigate wave attenuation caused by mangroves as a porous media. A 1-D mathematical model is derived modifying the shallow water equations (SWEs). Two approaches are used to involve existing of mangrove: friction term and diffusion term. The will be solved analytically using separation variables method numerically staggered finite volume method. From both methods, transmission coefficient obtained observe damping effect induced Several comparisons shown examine accuracy robustness numerical scheme. results show that coefficient, vegetation’s length have significant on coefficient. Moreover, observation extended 2-D SWEs, where conduct simulation over real bathymetry profile. from scheme validated data field measurement which took place in Demak, Central Java, Indonesia. research beneficial determine characteristics structures for coastal protection.