Do deterministic sediment detachment and transport equations adequately represent the process-interactions in eroding rills ? An experimental field study

Auteur(s) et Affiliation(s)



Description :
This paper tackles 2 main questions by linking observations, determination of hydraulic parameters and measurement of sediment transport with the formulae used in soil erosion models. First, do constant shear stress values in different rills with constant soil parameters result in the same soil detachment values? Secondly, deterministic soil erosion models make the assumption that there is a relationship (often further assumed to be linear) between shear stress and soil detachment; is this suitable for representing real erosion process combinations in natural rills? The results of this study strongly suggested that the model concept of most physical based soil erosion models is inadequate for modeling rill erosion processes. Measured total rill erosion rates were the sum of erosion rates caused by a combination of different soil erosion processes with different spatial and temporal distribution. This combination cannot be described by a single equation.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2013, vol. 101, p. 61-78, nombre de pages : 18, Références bibliographiques : 2 p.

Date :
2013

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena