| 长江河口洪水造床作用 |
| |
| 引用本文： | 巩彩兰,恽才兴.长江河口洪水造床作用[J].海洋工程,2002,20(3):94-97. |
| |
| 作者姓名： | 巩彩兰 恽才兴 |
| |
| 作者单位： | 华东师范大学,河口海岸国家重点实验室,上海,200062 |
| |
| 摘 要： | 据多年实测资料统计 ,长江口年径流总量 92 4 0亿m3,年输沙量 4 .86亿t,洪季的径流量和输沙量分别占全年总量的71.7%和 87.2 %。如遇洪水年 ,当洪峰流量超过 6 0 0 0 0m3 s时 ,中、下游河道水位明显抬高而进入防汛警戒状态 ,河床有明显冲淤变化 ;洪峰流量超过 70 0 0 0m3 s时 ,新生汊道及切滩串沟频频出现 ,给河口治理及深水航道开发带来重要的影响。从长江河口河槽演变基本特征及南港、北槽底沙输移强度引证长江洪水在河口地区的造床作用
|
| 关 键 词： | 长江河口 洪水造床 冲淤变化 |
| 文章编号： | 1005-9865(2002)03-0094-04 |
| 修稿时间： | 2001年4月30日 |
Floods rebuilding the riverbed of the Changjiang estuary |
| |
| GONG Cai lan,YUN Cai xing.Floods rebuilding the riverbed of the Changjiang estuary[J].Ocean Engineering,2002,20(3):94-97. |
| |
| Authors: | GONG Cai lan YUN Cai xing |
| |
| Abstract: | The water discharge of the Changjiang Estuary is plentiful and the sediment movement is active. The annual total runoff is 924,000 million cubic meters; the annual averaged sediment discharge reaches 486 million tons. The runoff and the sediment discharge during the flood seasons amount to 71.7% and 87.2 % of the annual total value based on the statistics of the metrical data. When the flood peak water discharge exceeds 6,000 m 3/s at the Datong Station, the water level of the middle and lower reaches of the river arrives at the flood preparation cautionary state and the riverbed changes obviously due to erosion and accumulation; when the flood discharge exceeds 7,000 m 3/s, the new branch of a river and cluster ditches cutting the beach occur frequently, which affects the estuary and the navigation channel development. The studies on the characteristics of the evolution of the river trough and the bedload transport of the South Channel and North Passage show that the floods rebuild the riverbed of the Changjiang Estuary. |
| |
| Keywords: | Changjiang Estuary floods rebuilding the riverbed change due to erosion and accumulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《海洋工程》浏览原始摘要信息 |
| 点击此处可从《海洋工程》下载免费的PDF全文 |
|
