The goal of this paper is to introduce the first clear-water scour model based on both the
informational entropy concept and the principle of maximum entropy, showing that a variational
approach is ideal for describing erosional processes under complex situations. The proposed
bridge–pier scour entropic (BRISENT) model is capable of reproducing the main dynamics of scour
depth evolution under steady hydraulic conditions, step-wise hydrographs, and flood waves. For the
calibration process, 266 clear-water scour experiments from 20 precedent studies were considered,
where the dimensionless parameters varied widely. Simple formulations are proposed to estimate
BRISENT’s fitting coefficients, in which the ratio between pier-diameter and sediment-size was the
most critical physical characteristic controlling scour model parametrization. A validation process
considering highly unsteady and multi-peaked hydrographs was carried out, showing that the
proposed BRISENT model reproduces scour evolution with high accuracy.

How to cite: Pizarro, A., C. Samela, M. Fiorentino, O. Link, and S. Manfreda, BRISENT: An entropy-based model for bridge-pier scour estimation under complex hydraulic scenariosWater, 9(11), 889 (doi:10.3390/w9110889), 2017. [pdf]