中文摘要：

从 Changjiang 河(长江) 河口， Hangzhou 海湾，和他们的邻近的水的表面沉积为他们的谷物尺寸分发，器官的碳(OC ) 集中，和稳定的碳同位素作文被分析(¹³ C ) 。把分析基于这，大约 36 件表面沉积样品从各种各样的环境被选择并且分开了成沙(> 0.250 公里， 0.1250.250 公里， 0.0630.125 公里)并且淤泥( 0.0250.063 公里)由湿筛的分别方法的部分，并且推进进淤泥--( 0.0040.025 公里)并且泥土大小(< 0.004 公里)由离心的分别的部分。六个谷物尺寸范畴的沉积为他们的 OC 和 ¹³ 探索谷物的 C 内容在学习区域缩放沉积 OC 的作文和运输路径。从对粗糙的部分好，分别地， OC 内容是 1.18% ， 0.51% ， 0.46% ， 0.42% ， 0.99% ，和 0.48% 当时 ¹³ C was21.64,22.03,22.52,22.46,22.36， and22.28 分别地。在每个尺寸范畴， OC 贡献分别地是 42.96% ， 26.06% ， 9.82% ， 5.75% ， 7.09% ，和 8.33% 。在泥土和好淤泥部分的 OC 内容(< 0.025 公里) 是大约 69.02% 。高 OC 集中主要被发现在近海在 Changjiang 河河口的东北，在在 Changjiang 河和 Hangzhou 海湾的更低的河口的现代沉积，并且在气旋的埃迪的现代沉积现代沉积到济州岛的西南。与 ¹³ 体积沉积的 C 显示在 Changjiang 河河口的陆上的器官的材料是搬运朝海的方向并且经由二条小径驱散现代沉积到气旋的埃迪到济州岛的西南：一个人是 Changjiang 河的结果冲淡的水(CDW ) 北方江苏沿海的水流和黄海沿海的水流驾驶的向东北的延长分支，当另一个是 CDW 的结果时台湾温暖的水流驾驶的向南方的延长分支。

英文摘要：

Surface sediments from the Changjiang River （Yangtze River） Estuary, Hangzhou Bay, and their adjacent waters were analyzed for their grain size distribution, organic carbon （OC） concentration, and stable carbon isotope composition （δ13C）. Based on this analysis, about 36 surface sediment samples were selected from various environments and separated into sand （〉0.250 ram, 0.125-0.250 ram, 0.063-0.125 mm） and silt （0.025-0.063 mm） fractions by wet-sieving fractionation methods, and further into silt- （0.004-0.025 mm） and clay-sized （〈0.004 mm） fractions by centrifugal fractionation. Sediments of six grain size categories were analyzed for their OC and 613C contents to explore the grain size composition and transport paths of sedimentary OC in the study area. From fine to coarse fractions, the OC content was 1.18%, 0.51%, 0.46%, 0.42%, 0.99%, and 0.48%, respectively, while the δ13C was -21.64‰, -22.03‰, -22.52‰, -22.46‰, -22.36‰, and -22.28%0, respectively. In each size category, the OC contribution was 42.96%, 26.06%, 9.82%, 5.75%, 7.09%, and 8.33%, respectively. The OC content in clay and fine silt fractions （〈0.025 ram） was about 69.02%. High OC concentrations were mainly found in offshore modern sediments in the northeast of the Changjiang River Estuary, in modern sediments in the lower estuary of the Changjiang River and Hangzhou Bay, and in Cyclonic Eddy modern sediments to the southwest of the Cheju Island. Integrating the distribution of terrestrial OC content of each grain size category with the δ13C of the bulk sediment indicated that the terrestrial organic material in the Changjiang River Estuary was transported seaward and dispersed to the Cyclonic Eddy modern sediments to the southwest of the Cheju Island via two pathways： one was a result of the Changjiang River Diluted Water （CDW） northeastward extending branch driven by the North Jiangsu Coastal Current and the Yellow Sea Coastal Current, while the other one was the result of the CDW southward