Meander-braided Transition Features and Abandoned Channel Patterns in Fluvial Environment
doi: 10.14027/j.cnki.cjxb.2017.01.001
Funds:
National Natural Science Foundation of China, No. 41572080, 41272132;Science and Technology Projects of Huabei Oilfield Company, CNPC, No. HBYT-YJY-2015-JS
- Received Date: 2015-11-16
- Rev Recd Date: 2016-03-04
- Publish Date: 2017-02-10
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Key words:
- meander-braided transition of river /
- sedimentary sequence /
- abandoned channel /
- fluvial environment in Permian
Abstract: Based on summing up the great variability and dynamic behavior of rivers, we analyzed the meander-braided transition characteristics and constructed its sedimentary sequence. According to the relationship between sinuosity and abandoned channels, we divided abandoned channels into three patterns which are avulsion, chute cutoff- and neck cutoff- abandoned channel, respectively, and each pattern has its particular sedimentary sequence model. Furthermore, by analyzing the sedimentary characteristics from a Permian fluvial outcrop located in Beijing western suburbs, we clarified the evolution of braided, meander-braided transition and meandering channels and distinguished three abandoned channels. We reached the conclusion that the main factor leading to meander-braided transition in the study area is the change of sediment supply caused by different climate conditions.
| Citation: | LI ShengLi, YU XingHe, JIANG Tao, LIANG XingRu, SU DongXu. Meander-braided Transition Features and Abandoned Channel Patterns in Fluvial Environment[J]. Acta Sedimentologica Sinica, 2017, 35(1): 1-9. doi: 10.14027/j.cnki.cjxb.2017.01.001
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