Controls on Zero‐Order Basin MorphologyAuthor(s): Stuart W. D. Grieve; Tristram C. Hales; Robert N. Parker; Simon M. Mudd; Fiona J. Clubb
Source: Journal of Geophysical Research: Earth Surface
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
Download Publication (2.0 MB)
Zero-order basins are common features of soil-mantled landscapes, defined as unchanneled basins at the head of a drainage network. Their geometry and volume control how quickly sediment may reaccumulate after landslide evacuation and, more broadly, zero order basins govern the movement of water and sediment from hillslopes to the fluvial network. They also deliver water and sediment to the uppermost portions of the fluvial network. Despite this role as the moderator between hillslope and fluvial processes, little analysis on their morphology has been conducted at the landscape scale. We present a method to identify zero-order basins in landscapes and subsequently quantify their geometric properties using elliptical Fourier analysis. We deploy this method across the Coweeta Hydrologic Laboratory, USA. Properties such as length, relief, width, and concavity follow distinct probability distributions, which may serve as a basis for testing predictions of future landscape evolution models. Surprisingly, in a landscape with an orographic precipitation gradient and large hillslope to channel relief, we observe no correlation between elevation or spatial location and basin geometry. However, we find that two physiographic units in Coweeta have distinct zero-order basin morphologies. These are the steep, thin soiled, high-elevation Nantahala Escarpment and the lower-gradient, lower-elevation, thick soiled remainder of the basin. Our results indicate that basin slope and area negatively covary, producing the distinct forms observed between the two physiographic units, which we suggest arise through competition between spatially variable soil creep and stochastic landsliding.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGrieve, Stuart W. D.; Hales, Tristram C.; Parker, Robert N.; Mudd, Simon M.; Clubb, Fiona J. 2018. Controls on Zero‐Order Basin Morphology. Journal of Geophysical Research: Earth Surface. 3(2): 89-. https://doi.org/10.1029/2017JF004453.
- Vegetation-environment relationships in zero-order basins in coastal Oregon.
- Lithological and fluvial controls on the geomorphology of tropical montane stream channels in Puerto Rico
- Metal concentrations in urban riparian sediments along an urbanization gradient
XML: View XML