Study on geomorphology and structure of coral reefs as a disaster protection feature in coastal areas

本研究从地貌学和沉积学的角度对生物礁的抗波结构有了具体而详细的认识。首先，我们尝试使用本研究基金引进的高分辨率多波束测深声纳来观测外礁斜坡的三维地形，如毛刺和凹槽。这是琉球群岛复杂外礁斜坡地形的第一个三维可视化。我们还分析了我们在琉球群岛和马尔代夫钻探的岩心。海底胶结物的发育主要分布在礁体的上边缘，有利于形成刚性礁体结构。

In this research program, we observed a concrete and detailed knowledge on wave-resistant structure of reefs from geomorphology and sedimentology. The firstly, we attempts to observe three-dimensional topography of outer reef slope such as spurs and grooves using high-resolution multibeam bathymetric sonar which was introduced by this research grant. This is the first 3D visualization of complex outer reef slope topography in the Ryukyu Islands. We also analyze the drilling cores that we drilled in the Ryukyu Islands and Maldives. The development of submarine cement is distributed significantly at the upper reef edges and contributed to form the rigid reef structure.