ABSTRACT
This chapter presents basic concepts, methods, and procedures in bridge scour design and protection, including hydrology study, hydraulic analysis, scour evaluation, and scour protection.
Hydrology study is to determine design discharge, either the peak discharge or the flood hydrograph (in some cases both) at the highway stream crossings. Hydraulic analysis is to convert design discharge to hydraulic variables such as velocity, flow depth, and bed shear stress eroding bed materials around bridge piers and abutments. Scour design is to evaluate the maximum possible scour depth corresponding to design discharge. Scour protection provides counter measurements resisting scour process. Below the state-of-the-practice in bridge design and protection is outlined.
