渤海中部海域海底地形地貌特征及其影响因素分析

渤海中部海域位于三湾(渤海湾、莱州湾、辽东湾)交汇处,形成与演化历史悠久,沉积物源丰富,其内部蕴含着丰富的地质信息.本研究基于多年来采集和搜集的高精度地形地貌数据、浅地层剖面数据和沉积物样品的测试分析数据,精细刻画了渤海中部海域海底地形地貌特征,并对其影响因素进行了分析.研究表明,渤海中部海域海底地形总体上呈现中间低、...

Analysis of Seabed Topographic and Geomorphologic Features and Influencing Factors in the Middle Area of Bohai Sea

The central waters of Bohai Sea is located in the intersection of the three bays (Bohai Bay, Laizhou Bay, Liaodong Bay), with a long history of formation and evolution, multiple sediment sources and rich geological information.Based on the high-precision topographic and geomorphologic data, shallow stratigraphic profile data and test analysis data of sediment samples collected over the years, this study finely described the topographic and geomorphologic features of the seabed in the central Bohai Sea, and analyzed its influencing factors.The research shows that the seabed topography of the central Bohai Sea is generally low in the middle and high on the north and south sides.The topography of the northern region is complex, and the southern region is relatively flat.According to the characteristics of submarine geomorphology, the submarine geomorphologic units in the study area are divided into shelf erosion depression, shelf accumulation plain and bay accumulation plain.Geomorphology is the result of the combined action of regional geological tectonic movements, sea level changes, modern marine hydrodynamics, and sediment sources.Studying the topographic and geomorphologic features of the seabed in the central Bohai Sea is helpful to deepen the understanding of the evolution of its geological structure, and is of great significance to the construction of marine engineering, the development of marine pastures, the utilization of marine resources and the development of marine economy.