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篇目详细内容 |
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【篇名】 |
Analysis of current directions in the bends of an ephemeral river and its geological implications |
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【刊名】 |
Frontiers of Earth Science in China |
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【刊名缩写】 |
Front. Earth Sci. China |
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【ISSN】 |
1673-7385 |
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【EISSN】 |
1673-7490 |
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【DOI】 |
10.1007/s11707-010-0125-2 |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2010 |
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【卷期】 |
4
卷4期 |
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【页码】 |
417-426
页,共
10
页 |
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【作者】 |
Barendra PURKAIT;
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【关键词】 |
Usri River; ephemeral; meandering; point bar; directional data; vector means |
【摘要】 |
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Sediment transport directions in four point bars of an ephemeral meandering river Usri, India, were measured from sedimentary structures and compared with the flow directions of the adjacent river-channel flow. As the bars were crescentic in shape, each bar has been divided into several sectors along with the adjacent river-channel bend. Vector means of sediment transport directions in each sector were computed and compared with the vector means of the flow directions of the corresponding river-channel sector. The relationship between the sediment transport direction in the bar and the water flow direction of the adjacent river-channel is sometimes divergent and sometimes convergent. However, the difference between the vector means of the sediment transport direction in the bar and the flow direction of the adjacent river-channel water is subtle. Hence, it can be concluded that the sediment transport direction in the bar is parallel to the flow direction of the adjacent river-channel water. Therefore, the result of the present study implies reconstructing the paleo-river channel course. |
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