气候变化领域集成服务门户(CCPortal): The role of lateral erosion in the evolution of nondendritic drainage networks to dendricity and the persistence of dynamic networks

CCPortal

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
	Kwang J.S.; Langston A.L.; Parker G.
发表日期	2021
ISSN	00278424
卷号	118 期号:16
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. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Drainage networks; Drainage reorganization; Landscape evolution; Lateral migration
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179850
作者单位	Department of Geosciences, University of Massachusetts Amherst, Amherst, MA 01003, United States; Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801, United States; Department of Geography and Geospatial Sciences, Kansas State University, Manhattan, KS 66506, United States; Department of Geology, University of Illinois Urbana-Champaign, Urbana, IL 61801, United States
推荐引用方式 GB/T 7714	Kwang J.S.,Langston A.L.,Parker G.. The role of lateral erosion in the evolution of nondendritic drainage networks to dendricity and the persistence of dynamic networks[J],2021,118(16).
APA	Kwang J.S.,Langston A.L.,&Parker G..(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 Sciences of the United States of America,118(16).
MLA	Kwang J.S.,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 Sciences of the United States of America 118.16(2021).