2-D Flood Modelling of Eldon square
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     The situation is that there is a flood problem in central Newcastle where water ponds and
     enters high street shops after intense rainfall. It is likely that the problem will be
     exacerbated by increases in short duration rainfall associated with climate change.

     The aim is to assess current and future flood risk affecting the New Eldon Square
     shopping Centre in central Newcastle, using urban flood modeling software ( City Cat,
     a 2D flood modeling Software) and to propose and assess suitable adaptation options.
     The storm duration input is of a 1 hour with a 20 year Return Period (5% AEP), with
     these data’s we are able to calculate the maximum depth of water adjacent to New Eldon
     Square which is the most susceptible area.
     The solutions that were looked into were:
     -Installing green roofs to all the buildings in the domain at a cost of £50/m2 material
     and £50/m2 installation).
     -Converting all of the impermeable pavements and road surfaces to permeable paving at
     a total cost of £80/m2.
     The result shows that these procedures are worth taken into consideration even if the
     cost of material and installation are relatively high they are a a good investment
     especially if we consider compare to the flood damages.



2-D Flood Simulation result with the current situation of Eldon Square a water depth of 1.2 m is reached and water depth accumulation starts at time(1700 sec)
2012 Maamari. All rights reserved.
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Halim Richard Maamari
Water and Landscapes
2-D Flood Simulation result after roof gardens and permeable surfaces installation in  Eldon Square, a water depth of 0.12 m is reached and water depth accumulation starts at time(3200), which means that these adaptation measures reduced greatly the depth of flooding as well start time of water accumulation.
Eldon square in Newcastle , The red oval shape represents the area at Risk of flooding.
2-D Plan view and result of simulation after a (5% AEP) storm for 1 hour, the dark purple areas represents Flooded Area.
Depth Damage Curve.