Flood Simulation

In this assignment, my lecture point me to create a Flood Simulation by using 3D Rad but 3D Rad is something new for me. So , I done it in Unity 3D since I more comfortable with it. in this simulation I need to create a Flood scene. Most of the building I done it in Google sketch Up since to create a low poly building are easy in Google Sketch up compare to 3D Max