Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2015770118 |
The role of lateral erosion in the evolution of nondendritic drainage networks to dendricity and the persistence of dynamic networks | |
Jeffrey S. Kwang; Abigail L. Langston; Gary Parker | |
2021-04-20 | |
发表期刊 | Proceedings of the National Academy of Science
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出版年 | 2021 |
英文摘要 | Dendritic, i.e., tree-like, river networks are ubiquitous features on Earth’s landscapes; however, how and why river networks organize themselves into this form are incompletely understood. A branching pattern has been argued to be an optimal state. Therefore, we should expect models of river evolution to drastically reorganize (suboptimal) purely nondendritic networks into (more optimal) dendritic networks. To date, current physically based models of river basin evolution are incapable of achieving this result without substantial allogenic forcing. Here, we present a model that does indeed accomplish massive drainage reorganization. The key feature in our model is basin-wide lateral incision of bedrock channels. The addition of this submodel allows for channels to laterally migrate, which generates river capture events and drainage migration. An important factor in the model that dictates the rate and frequency of drainage network reorganization is the ratio of two parameters, the lateral and vertical rock erodibility constants. In addition, our model is unique from others because its simulations approach a dynamic steady state. At a dynamic steady state, drainage networks persistently reorganize instead of approaching a stable configuration. Our model results suggest that lateral bedrock incision processes can drive major drainage reorganization and explain apparent long-lived transience in landscapes on Earth. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/322839 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Jeffrey S. Kwang,Abigail L. Langston,Gary Parker. The role of lateral erosion in the evolution of nondendritic drainage networks to dendricity and the persistence of dynamic networks[J]. Proceedings of the National Academy of Science,2021. |
APA | Jeffrey S. Kwang,Abigail L. Langston,&Gary Parker.(2021).The role of lateral erosion in the evolution of nondendritic drainage networks to dendricity and the persistence of dynamic networks.Proceedings of the National Academy of Science. |
MLA | Jeffrey S. Kwang,et al."The role of lateral erosion in the evolution of nondendritic drainage networks to dendricity and the persistence of dynamic networks".Proceedings of the National Academy of Science (2021). |
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