 The most important growth areas since the period following World War II have been Borgo Trevi (commercial, residential, and offices), Pietrarossa (industrial), and Matigge (light and medium industry, commercial).Many rivers and canals, none of them very large, run in a general south-to-north direction, converging into a single river near Bevagna.Their courses are by now highly artificial, the result of land and water management projects undertaken over many centuries, since they are recorded at least as early as the time of Theodoric the Great (6th century) and have continued down to our own time with the construction of dams and works to regularize the seasonal waters of the Marroggia that had been subject to frequent torrential overflows with sudden and disastrous results.