Meander Characteristics of the Jialing River’s Old Channels
详细信息
- 责任者：Jiang Huajun (Faculty of Earth Sciences ; China University of Geosciences ; Wuhan 430074 ; China) ; Li Changan
- 刊名：Earth Science
- 出版年：2013
- 卷期：38(2)
- 关键词：古河道 ; buried channels ; 嘉陵江 ; Jialing River
- 页码：p.417-422
- 图表：illus., 3 tables, 20 refs.
- 分类号：1400
- issnNo：ISSN1000-2383
- isbnNo：CN42-1233/P
摘要
Based on data of the remote sensing and field surveys, the distribution of old channels in the Jialing River is explored. A total of 13 old channels are found and determined. They are distributed mainly in the reach of Langzhong-Nanchong of the Jialing River. Statistical meander parameters indicate that their meander ratio C values are all larger than 3.00, with an average value of 7.80. C values of 4 meander belts are larger than 2.20, and the C value of the whole middle reach of ancient Jialing River is 2.75. All these values are much larger than 1.50, the critical value of meandering rivers, suggesting that the ancient Jialing River has characteristics of meandering river pattern. In addition, it is found that the C value of the ancient river is larger than that of modern channel (It is believed that the larger C value may be associated with the lower gradient value J), indicating a lager degree of curve. It can be concluded that a process of natural cutoff of river has once occurred in the Jialing River.