Discussion on "Addressing climatic non-stationarity in the assessment of fl ood risk" by S Westra, I Varley, P Jordan, R Nathan, A Ladson, A Sharma and P Hill.

The article offers information on the discussion concerning the climatic non-stationarity in assessing the risk of flood in Australia. It notes on how non-stationarity of flood flow is better described with chaos theory, catastrophe theory and hydrologic cycle. It mentions that non-stationarity of historical flood records are being addressed as a significant issue of catchments which have undergone changes due to urbanization and land changes.