Author(s): L. Toombes

Linked Author(s):

Keywords: Design; Modelling; Uncertainty; Reliability; HEC-RAS; Physical model

Abstract: Designed by 2007, built by 2010, limits pushed by 2011; the occurrence of an extreme flood event at the Nam Theun 2 hydropower dam system in Laos sparked a reassessment of the hydrology resulting in an increase of over 30% in design flows and leaving the flood release infrastructure well short of the required capacity. This increase and subsequent attempts to re-analyse the release structures, ranging from simplified HEC-RAS modelling to sophisticated CFD and physical modelling, serve as examples of the uncertainty and risks that can be encountered in the design of hydraulic structures.

DOI: https://doi.org/10.14264/uql.2014.46

Year: 2014