For fluvial erosion results, the previous relationships between the critical shear stress, and the erodibility coefficient indicated that they do not follow the values of the experimental works and the U-Tapao River, Thailand. The main objective of this paper is to introduce a novel coupled method for simulating the fluvial erosion, cantilever failure and bedload sediment transport to describe the overhanging properties of experimental banks and natural riverbanks. The new model can therefore be used to determine the geometrical parameters of the failed blocks of riverbanks subject to planar failure. Based on a comparison of these errors with those derived from a range of existing equations, we show that this represents a considerable improvement relative to prior studies.
#Typesy full cracked crack#
Based on observations from field and laboratory tests, we found that the new model provides a mean relative error (MRE) of 4%, 23%, and 27% between calculated and observed values of failure plane angle, tension crack depth, and bank-top retreat, respectively. The estimated tension crack depth is then used in a bank stability analysis, from which the failure plane angle can be evaluated. This is achieved by employing a combination of field and laboratory data to first derive a set of empirical curves to estimate the tension crack depth.
In this paper we introduce a new analytical method to estimate the failure plane angle.
To reliably analyze the stability of riverbanks against planar failures many parameters (including the failure plane angle and the depth of the tension crack) have to be determined. Of the many different types of riverbank failure, the planar failure mechanism is perhaps the most common, being associated with steep, relatively low banks composed of cohesive sediments.
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