气候变化领域集成服务门户(CCPortal): Characteristic Scales of Drainage Reorganization in Cascadia

CCPortal

DOI	10.1029/2020GL091413
	Characteristic Scales of Drainage Reorganization in Cascadia
	Struble W.T.; Roering J.J.; Dorsey R.J.; Bendick R.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:3
英文摘要	Variations in uplift, erosion, climate, and bedrock are commonly invoked as key controls on drainage basin morphology, yet the scale of landforms that define changes in regional drainage networks has not been addressed, limiting our ability to predict their planform evolution. Here we use two-dimensional (2D) continuous wavelet transforms of topography in Cascadia to highlight dominant topographic features at different scales. Surprisingly, our wavelet analysis shows that for wavelengths >30 km, the Cascadia Forearc Lowland (CFL) spans the entire margin. Separately, we compare observed catchment boundaries with synthetic boundaries generated on topography filtered with 2D Gaussian functions. We observe reorganization of synthetic drainage networks from an arc-to-coast drainage system into arc-spanning, margin-parallel river systems, akin to the modern Willamette River and coincident with the CFL. In concert with field observations of stream capture and Willamette Valley expansion, we propose that the Cascadia forearc is actively transitioning to a predominately margin-parallel river system. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Drainage; Rivers; Topography; Wavelet transforms; Continuous Wavelet Transform; Drainage networks; Drainage systems; Field observations; Gaussian functions; River systems; Topographic features; Two Dimensional (2 D); Catchments; Cascadia
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169131
作者单位	Department of Earth Sciences, University of Oregon, Eugene, OR, United States; Department of Geosciences, University of Montana, Missoula, MT, United States
推荐引用方式 GB/T 7714	Struble W.T.,Roering J.J.,Dorsey R.J.,et al. Characteristic Scales of Drainage Reorganization in Cascadia[J],2021,48(3).
APA	Struble W.T.,Roering J.J.,Dorsey R.J.,&Bendick R..(2021).Characteristic Scales of Drainage Reorganization in Cascadia.Geophysical Research Letters,48(3).
MLA	Struble W.T.,et al."Characteristic Scales of Drainage Reorganization in Cascadia".Geophysical Research Letters 48.3(2021).