| 两类多河道河流的形式模式及河道稳定性比较 |
| 修订日期：2001-07-03 |
| 关键词:multiple channel river formation model channel appearance mid-channel land appearance |
| 基金项目:中国科学院地理科学与资源研究所知识创新工程领域前沿项目(CX10GA00-05-01) |
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| 摘要: |
| Comparison of Formation Model and Channel Stability between Two Different Sorts of Multiple Channel River Patterns |
| In multiple channel rivers, anastomosing rivers as a new river pattern differing from anabranched and braided rivers have aroused much attention. Nevertheless, the difference between the anabranched and the anastomosing rivers is frequently ignored. Some researchers even think that they are of the same channel pattern according to channel planform. To explain their fundamental differences, this paper focuses on the multiple channel formation models of the two river patterns. Based on the study of the anabranched channel reach of Lower Changjiang River and the anastomosing Jingjiang distributaries, it is held that the anabranched multiple channel forms with appearance of one or more mid channel lands, which have two layers of sediments whose grains are thin and fine in the upper part and thick and coarse in the lower part, whereas the anastomosing multiple channel forms with appearance of one or more stable channels on the floodplain surrounded by coherent fine grained sediments. Anastomosing multiple channels show higher stability than anabranched ones. |
| WANG Sui-ji.2002.Comparison of Formation Model and Channel Stability between Two Different Sorts of Multiple Channel River Patterns[J].Acta Geoscientica Sinica,23(1):89-93. |
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