Influencing Factors of Submarine Scouring and Siltation Changes in Offshore Area of Shandong Peninsula

This study constructs a digital elevation model of the coastal waters Shandong Peninsula using GIS-based interpolation methods to investigate 15-year characteristics seabed scouring and siltation. It utilizes depth data Peninsula’s offshore area between 2004 2006 2017 2019. The results indicated that coastal-water is characterized by integral siltation local point scouring. In addition, northwest dominated siltation, mainly distributed 2 5 m isobaths, with largest located in Laizhou Bay. net volume 2.13 × 108 m3, rate 0.152 m3.a−1, concentrated estuary west coast Scouring balance generally characterize northern Peninsula, degree weak. occurs primarily near land area, while as sea deepens. northeast extreme, their distribution range small, whereas south, large bays straight waters, its relatively At southernmost end Jiaozhou Bay are spatially balanced. reality, key factors affecting coastal-seabed materials transported river sediment, scouring, human activities.