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Cross-drainage hydraulic structures such as culverts and bridges in urban landscapes are prone to get blocked by the transported debris (e.g., urban, vegetated), which often reduces their hydraulic capacity and triggers flash floods. Unavailability of relevant data from blockage-originated flooding events and complex nature of debris accumulation are highlighted factors hindering the research within the blockage management domain. Wollongong City Council (WCC) blockage conduit policy is the leading formal guidelines to incorporate blockage into design guidelines; however, are criticized by the...

Floods are the most recurrent, widespread and damaging natural disasters, and are ex-pected to become further devastating because of global warming. Blockage of cross-drainage hydraulic structures (e.g., culverts, bridges) by flood-borne debris is an influen-tial factor which usually results in reducing hydraulic capacity, diverting the flows, dam-aging structures and downstream scouring. Australia is among the countries adversely impacted by blockage issues (e.g., 1998 floods in Wollongong, 2007 floods in Newcas-tle). In this context, Wollongong City Council (WCC), under the Australian R...

Blockage of cross-drainage hydraulic structures (e.g., bridges, culverts) is reported as an exacerbating factor during flash flooding in Wollongong and Newcastle. Lack of data from flooding events and the fragmentary nature of post-flood data are the factors hindering research in studying the impact of blockage on the performance of hydraulic structures. This paper proposes lab-scale simulations using scaled physical models of culverts to study the behaviour and effects of urban and vegetative debris. The first investigation studies the interaction between specific debris types with culvert in...