Gully geometry: what are we measuring?

Autor: J. Casalí, R. Giménez, M. A. Campo-Bescós
Jazyk: angličtina
Rok vydání: 2015
Předmět:
Zdroj: SOIL, Vol 1, Iss 2, Pp 509-513 (2015)
Druh dokumentu: article
ISSN: 2199-3971
2199-398X
DOI: 10.5194/soil-1-509-2015
Popis: Much of the research on (ephemeral) gully erosion comprises the determination of the geometry of these eroded channels, especially their width and depth. This is not a simple task due to uncertainty generated by the wide range of variability in gully cross section shapes found in the field. However, in the literature, this uncertainty is not recognized so that no criteria for their measurement are indicated. The aim of this work is to make researchers aware of the ambiguity that arises when characterizing the geometry of an ephemeral gully and similar eroded channels. In addition, a measurement protocol is proposed with the ultimate goal of pooling criteria in future works. It is suggested that the geometry of a gully could be characterized through its mean equivalent width and mean equivalent depth, which, together with its length, define an "equivalent prismatic gully" (EPG). The latter would facilitate the comparison between different gullies.
Databáze: Directory of Open Access Journals