| 亟待开展黄河下游河道远景学研究 |
| |
| 引用本文： | 孙超.亟待开展黄河下游河道远景学研究[J].冰川冻土,2005,27(3):444-448. |
| |
| 作者姓名： | 孙超 |
| |
| 作者单位： | 河南黄河勘测设计研究院, 河南, 郑州, 450008 |
| |
| 基金项目： | 中国科学院知识创新工程项目 |
| |
| 摘 要： | 黄河下游河段河床淤积严重,目前面临的主要问题是: 1)20世纪90年代以来,由于水沙矛盾加剧,河道萎缩,主槽过洪能力锐减,平滩流量在一些河段已由80年代的5000m3·s-1降至目前的3000m3·s-1;2)由于水沙变化,20世纪70年代开始在局部河段出现的“二级悬河”,现已逐渐在上游的河南段和下游的山东段发展到210km多.研究表明,黄河下游的淤积是自然地质过程,应亟待开展黄河下游河道远景学研究.
|
| 关 键 词： | 黄河下游河道淤积 二级悬河 自然地质过程 下游河道远景学 |
| 文章编号： | 1000-0240(2005)03-0444-05 |
| 收稿时间： | 2004-11-21 |
| 修稿时间： | 2004年11月21日 |
Desiderating Study on Future Prediction of Channel Dynamic in the Lower Yellow River |
| |
| SUN Chao.Desiderating Study on Future Prediction of Channel Dynamic in the Lower Yellow River[J].Journal of Glaciology and Geocryology,2005,27(3):444-448. |
| |
| Authors: | SUN Chao |
| |
| Institution: | Yellow River Survey and Design Institute of Henan Province, Zhengzhou Henan 450008, China |
| |
| Abstract: | The sediment deposit and the rising of the channel bed are the key problems of the Lower Yellow River. Severe soil erosion from the Loess Plateau where the upper reaches of the Yellow River traverses has accumulated by big amount at the lower reaches of the river, making the riverbed elevated by annual rate of 0.1 meters, and now the watercourse is four to six meters higher above ground level for about 800 kilometers in the lower reaches. The capable of water flow in channel of the lower Yellow River have greatly reduced from {5 000 } m 3 per second in1980s to {2 000 }~ {3 000 } m 3 per second due to sediment deposit and the rising of channel bed. ;From the history of the Yellow River, we know that the Yellow River flowed through the north side of the current channel before the year 1128 into the Bohai Sea in Tianjing. From 1128 to 1855, the Yellow River flowed through the south side of the current channel, passing the Huaihe River into the Yellow Sea. After the breach at Tongwaxiang, the Yellow River flowed along the current channel into the Bohai Sea. The current channel from Dongbatou to Zhengzhou is the old channel of the Ming dynasty and the Qing dynasty which has a history of more than 500 years. In the section between Dongbatou and the estuary, the flow spread after the breach in 1855 without man-made dikes. In 1877, the government built the dike based on the levees built by local residents after 22 years of overflow. The channel change and sediment deposit are result in the geological process. The prediction of the channel dynamics should be desiderated in the Yellow River harness in future. |
| |
| Keywords: | sediment deposit in channel bed the rising of the channel bed nature geological process prediction of the channel dynamics |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《冰川冻土》浏览原始摘要信息 |
| 点击此处可从《冰川冻土》下载免费的PDF全文 |
|
