Document
type: Class

Catena
publication venue for: Spatial variation of bed roughness in eroding rills and gullies
type: Information Content Entity
type: Generically Dependent Continuant
type: Journal
type: Continuant
type: Entity
type: Collection
type: Periodical
type: Thing
type: Document

Continuant
type: Class

Entity
type: Class

Generically Dependent Continuant
type: Class

RDF description of Spatial variation of bed roughness in eroding rills and gullies - http://orbis.uaslp.mx/vivo/individual/scopus3240
rights: termsOfUse
date: 2026-08-25T13:03:42
publisher: vivo
type: Document

Article
type: Class

European Commission, EC: 037046, 1.1.6.3
type: Relationship
type: BFO_0000020
type: Entity
type: Thing
type: Grant
type: Continuant
funding vehicle for: Spatial variation of bed roughness in eroding rills and gullies

Information Content Entity
type: Class

Spatial variation of bed roughness in eroding rills and gullies
type: Article
abstract: When overland flow concentrates rill and gully channels can be formed if a series of thresholds are exceeded. These thresholds are more or less explicitly linked to the erosion resistance of the topsoil. Moreover, flow velocity and channel width depend on total flow discharge. More recently also bed roughness in eroding channels has been attributed to the eroding effect of flow discharge while channel width was shown to be the result of the interplay between erosion resistance of the topsoil and flow discharge (see channel junction approach, Torri et al., 2006), which could be described by a modified Leopold and Maddock%27s relationship. The objective of this paper is to investigate the spatial variability of channel bed roughness in rills and gullies using an approach based on these findings. Field data confirm the various aspects reported so far. Hence these were used to develop a new equation allowing one to predict bed roughness in eroding rill and gully channels. Each of the new aspects introduced into the channel width-flow discharge equation by the channel junction approach is discussed and verified with new data. The validity of this approach is tested against channel data from Mars. Finally, an equation predicting bed roughness and based on stream power is developed and compared with measured rill and gully bed roughness successfully, confirming that 1) bed roughness, if generated by concentrated flow, increases with stream power; 2) channel width, local bed slope, topsoil cohesion at saturation, and grain size are all important factors controlling channel bed roughness; and 3) these variables as well as soil characteristics, all measurable in the field after a rill or gully forming event, are sufficient to determine channel bed roughness. Therefore one may expect that bed roughness of an eroded channel (and consequently hydraulic roughness or friction) will generally increase with bed gradient, erosion resistance of the soil and grain size, following a log…
volume: 90
date time value: article date 3241
freetext keyword: Channel bed roughness; Concentrated flow erosion; Formative discharge; Hydraulic geometry; Mars channels; Stream power bed roughness; cohesion; discharge; equation; grain size; gully erosion; Mars; overland flow; rill; spatial variation; threshold; topsoil
type: Entity
most specific type: Article
doi: 10.1016/j.catena.2011.10.004
e iscopus: 2-s2.0-82955222878
related by: authorship_18837
type: Thing
related by: authorship_18836
most specific type: Document
type: Continuant
type: Information Content Entity
page start: 76
crisid: 3241
type: Generically Dependent Continuant
abstract: When overland flow concentrates rill and gully channels can be formed if a series of thresholds are exceeded. These thresholds are more or less explicitly linked to the erosion resistance of the topsoil. Moreover, flow velocity and channel width depend on total flow discharge. More recently also bed roughness in eroding channels has been attributed to the eroding effect of flow discharge while channel width was shown to be the result of the interplay between erosion resistance of the topsoil and flow discharge (see channel junction approach, Torri et al., 2006), which could be described by a modified Leopold and Maddock's relationship. The objective of this paper is to investigate the spatial variability of channel bed roughness in rills and gullies using an approach based on these findings. Field data confirm the various aspects reported so far. Hence these were used to develop a new equation allowing one to predict bed roughness in eroding rill and gully channels. Each of the new aspects introduced into the channel width-flow discharge equation by the channel junction approach is discussed and verified with new data. The validity of this approach is tested against channel data from Mars. Finally, an equation predicting bed roughness and based on stream power is developed and compared with measured rill and gully bed roughness successfully, confirming that 1) bed roughness, if generated by concentrated flow, increases with stream power; 2) channel width, local bed slope, topsoil cohesion at saturation, and grain size are all important factors controlling channel bed roughness; and 3) these variables as well as soil characteristics, all measurable in the field after a rill or gully forming event, are sufficient to determine channel bed roughness. Therefore one may expect that bed roughness of an eroded channel (and consequently hydraulic roughness or friction) will generally increase with bed gradient, erosion resistance of the soil and grain size, following a logic…
type: Document
estado: published
has funding vehicle: European Commission, EC: 037046, 1.1.6.3
has publication venue: Catena
page end: 86
origen: scopus
related by: authorship_18835
related by: authorship_18834
related by: authorship_18833