摘要
高分辨率的回声测深、旁侧声纳及浅地层剖面记录首次直观地揭示了黄河口水下底坡上发育有大量形态不同的微地貌类型。据其形态特征和规模的差异,将它们划分为平滑海底、凹坑与洼地、冲沟、残留岗丘及扰动复合海底等五种类型。这些微地貌分布在不同水深条件下的不同水下三角洲单元上,并存在着相互联系和相互转化。黄河口海域特殊的沉积环境和复杂的动力条件是导致水下底坡微地貌形成发育的主要机制。
There are so many types of bottom features on the Huanghe River subaqueous slope revealed by the high-resolution acoustic data.The main types of the seafloor micromorphology include the smooth seafloor,the hollow and depression,the gully,the remained scarp and the textured seafloor They appeared and developed on the different subaqueous slope units accompanying with different water depths.The principal causative factors of the seafloor micromor-phology include the special depositions environment and the complex outer dynamical conditions in this region.This paper attempts to describe the appearance and distribution of the micromor-phology on the Huanghe River subaqueous slope and to analyze the causes forming these bottom features.
基金
国家自然科学基金
关键词
黄河口
水下
底坡
微地貌
冲沟
the Huanghe river mouth
subaqueous slope
high-resolution
gully
micromor-phology
