| 闽江河口沉积结构与沉积作用 |
| |
| 引用本文： | 刘苍字,贾海林,陈祥锋.闽江河口沉积结构与沉积作用[J].海洋与湖沼,2001,32(2):177-184. |
| |
| 作者姓名： | 刘苍字 贾海林 陈祥锋 |
| |
| 作者单位： | 华东师范大学河口海岸研究所 |
| |
| 基金项目： | 国家自然科学基金重点资助项目!4 97362 2 0号 |
| |
| 摘 要： | 结合已有的闽江河口航道整治研究成果，在该河口采集了130多个表层沉积物样品。根据对沉积结构、河口沙坝类型和水动力条件的分析，探讨了闽江河口沉积物的分布规律和沉积作用机制。研究结果表明，1）闽江河口可划分为砂质、混合和泥质3个沉积区，它们分别代表三角洲前缘、前缘斜坡和前三角洲沉积环境；2）闽江河口各汊道径、潮流强度对比不同，河口沉积过程有显著差异。径流在川石水道的发育中居主导作用，潮流是塑造梅花水道的主要因素；3）河口沙坝类型受制于输出水流的扩散形式，闽江河口有多种类型的河口沙坝，川石水道的河口沙坝为水下突堤型，乌猪水道北侧发育了水下突堤型沙坝，熨斗水道为拦门沙型河口沙坝，梅花水道则是潮流脊型的河口沙坝。
|
| 关 键 词： | 沉积结构 河口沙坝 沉积作用 径流作用 潮流 输出水流 |
| 收稿时间： | 1999/11/28 0:00:00 |
| 修稿时间： | 1999年11月28 |
SEDIMENTARY TEXTURE AND SEDIMENTATION IN THE MINJIANG RIVER ESTUARY |
| |
| LIU Cang Zi,JIA Hai Lin and CHEN Xiang Feng.SEDIMENTARY TEXTURE AND SEDIMENTATION IN THE MINJIANG RIVER ESTUARY[J].Oceanologia Et Limnologia Sinica,2001,32(2):177-184. |
| |
| Authors: | LIU Cang Zi JIA Hai Lin and CHEN Xiang Feng |
| |
| Institution: | State Key Laboratory of Estuarine and Coastal Research, Institute of Estuarine and Coastal Research, East China Normal University, Shanghai,200062;State Key Laboratory of Estuarine and Coastal Research, Institute of Estuarine and Coastal Research, East China Normal University, Shanghai,200062;State Key Laboratory of Estuarine and Coastal Research, Institute of Estuarine and Coastal Research, East China Normal University, Shanghai,200062 |
| |
| Abstract: | Combining the regulation of the navigable waterway in the Minjiang River Estuary, more than 130 surficial sediment samples ware collected in the Estuary area. Based on analysis of the sediment texture, river mouth bar type and hydrodynamic condition, the sediment distribution pattern and sedimentation mechanism of the estuary are invertigated. The major conclusions are summarized below. 1) The Minjiang River Estuary can be divided into three sediment areas, i. e., sandy, mixed and muddy sediment areas, and they present delta front, front slope and prodelta sedimentary environments, respectively. 2) Because of the difference between runoff and tidal current intensity of various distributary channel, the estuarine processes of the channels are distinct. The runoff plays a major role in the development of the Chuanshi Channel, and the tidal current is a principal factor of building the Meihua Channel. 3) The type of the river mouth is restricted by the diffusion pattern of the output flow. There are various types of the rivermouth bars in the Minjiang River Estuary. The bar of the Chuanshi Channel is a subaqueous jetted type. On the north side of the Wuzhu Channel grows the subaqueous jetted sand bar. A middle ground bar is located at the outlet of the Yundou Channel. The bar of the Meihua Channel consists of a series of tidal ridges. |
| |
| Keywords: | Sediment texture River mouth sandbar Sedimentation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《海洋与湖沼》浏览原始摘要信息 |
| 点击此处可从《海洋与湖沼》下载免费的PDF全文 |
|
