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本文采用“中美海洋沉积作用联合研究”调查中三个航次所获得的长江口区悬浮体资料,进行了悬浮体浓度、成分的分析及运移通量的计算,得出长江口悬浮体浓度普遍高,向海递减,东经122°20′—123°00′是悬浮体浓度由高到低的转折带;悬浮体由可燃和不可燃两部分组成,石英、云母等碎屑矿物在长江口区富集,向海迅速减少;在口门附近有大量的凝聚体存在;悬浮体往东南输送入海,北港为悬浮体入海的主要通道,悬浮体在长江口区经历着悬浮—运移—沉积—再悬浮—再运移—再沉积的复杂过程。
In this paper, the data of suspended sediment in the Yangtze River Estuary obtained from the three voyages of the “Sino-US Joint Study on Marine Sedimentation” were analyzed. The concentration and composition of the suspended sediment were calculated and the fluxes were calculated. The results showed that the suspended sediment concentration Generally high, decreasing to the sea, longitude 122 ° 20’-123 ° 00 ’is the turning point of the suspension concentration from high to low; the suspension from the combustible and non-combustible two parts, quartz, mica and other detrital minerals in the mouth of the Yangtze River There are a large number of aggregates in the vicinity of the entrance. The suspended sediments are transported to the southeast and into the sea. The North Port is the main channel into which the suspended sediments enter the sea. The suspended sediments undergo the sedimentation-migration-sedimentation in the Yangtze River Estuary. - Resuspension - Re-migration - Re-sedimentation complex process.