Gravel river widening by bank erosion in a straight stretch of river investigations on a numerical model

摘要

Removing existing bank protection works allows a lateral erosion and thus widening of a regulated stretch of river. Based on an extensive parameter study, a method was developed to estimate the maximum river width which has to be expected during the widening process - which is the main question while planning a measure of river widening. The controlling parameters and boundary conditions have been identified and the structural evolution of the process was investigated. The research work focuses on straight rivers with cohesionless bed and bank material which play a major role in the alpine region.