Author(s): Stephen Nash; Joanne Comer; Agnieszka Olbert; Michael Hartnett
Linked Author(s): Michael Hartnett
Keywords: Coastal flooding; Flood mechanisms; Flood management; Nested model; Urban flood modelling
Abstract: Flooding of coastal areas can be caused by a number of contributing factors: high river flows, high tides, storm surges or a combination thereof. This paper presents results of a numerical modelling investigation of the role of river flow in flooding of Cork City. The Cork City urban flood model was developed by dynamically linking a storm surge model of the northeast Atlantic with the multi-scale nested flood model, MSN＿Flood, which uses nesting to telescope down from90m resolution in Cork Harbour to 2m resolution in the city streets. LiDAR data was used to create the urban flood plain. The model is used to hindcast the 2009 major flood event and is shown to accurately recreate the flood levels and extents. The model is then used to investigate the contributions of river flows to flooding in the city by simulating a range of peak flow scenariosof the city centre regardless of tidal condition.
Year: 2018