EVALUATION OF PIER-SCOUR PREDICTIONS FOR WIDE PIERS USING FIELD DATA

Abstract

Many research have been carried out and formulas derived to estimate wide pier scour equation.
However, many of these formulas were derived using data from laboratory and very limited equation that had
been developed were tested using data from field. The purpose of this paper is to evaluate the laboratory wide
pier scour equation that proposed from the previous findings with field data set. Large number of field data from
the literature were extracted and it consist both clear-water and live-bed scour. A technique for evaluating the
quality of the data was created and tested to the data set. Three pier-scour equations of wide pier from the
literature also used to analyze the performance of each equation. Comparisons of computed and measured scour
depths show that the formula from the previous publication demonstrated the smallest discrepancy ratio and Root
Mean Square Error value when compared with the large number of laboratory and data from field.