| 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 点此下载全文 |
| 引用本文：王随继.2002.两类多河道河流的形式模式及河道稳定性比较[J].地球学报,23(1):89-93. |
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| 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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| 中文摘要:在多河道河流中，网状河流作为有别于分汊河流和辫状河流的河型而提出已经引起人们的注意，但它与分汊河流的区别常常被忽略。为了阐明二者的根本差别，力求从多河道形成模式上对二者进行比较研究。通过对长江下游分汊河流及荆江风状河流特定河段形成历史及方式的探索，提出河道内的江心洲化模式和河漫滩上的河道化模式分别是分汊河流和网状河流形成的基本途径。由此而决定了网状河道具有分汊河流更高的稳定性。 |
| 中文关键词:多河道河流 形成模式 河道化 江心洲化 |
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| Comparison of Formation Model and Channel Stability between Two Different Sorts of Multiple Channel River Patterns |
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| Abstract: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. |
| keywords:multiple channel river formation model channel appearance mid-channel land appearance |
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