科研之友
微信
新浪微博
Facebook
分享链接
摘要
The variation of the Earth's rotation rate is an important factor to influence channel evolution and to induce sediment disaster. According to a preliminary data analysis of the Yangtze R., the Yellow R, and the Huaihe R. it is indicated that there exists a relationship between flood, sediment transportation, channel evolution and the variation of the Earth rotation. As the Earth rotates from faster to slower, the lower flood and sediment transportation in the lower Yellow R, and the flood with a high frequency and lower intensity in the middle and lower Yangtze R. And the Huaihe R. occur. When the Earth rotates from slower to faster, the periods of high flood, medium and lower sediment transportation in the lower Yellow R., the flood with a lower frequency and higher intensity in the middle and lower Yangtze R. and the Huaihe R. take place, and it is just the most vigorous of chute cutoff for alternative bars in the Yangtze R., thus induce flood and sediment disaster. Between the two turning points of the variation of the Earth rotation, the channel develops gently and disasters of flood and sediment aren't induced in general.
- 出版日期1999
- 单位中国科学院国家天文台
