The outflow of the great lake is located in the south shore; here the territory becomes flat and the river winds with its bends through the cultivated fields (figure 1) which irrigation is allowed by the presence of many channels which get the water from the river (figure 2); to simulate the farmland the fields are cultivated with some species of grass, like festuca arundinacea or agrostis tenuis.
Even the winter aspect of the flat territory is very suggestive (figure 3).
