Arches were used to hold up the structure. The Romans found out that by using an arch they could build larger and stronger structures because the arch held the weight of the structure.
The aqueducts were used mainly to bring fresh clean water to where it was needed. This need could be either in cities and towns or for agriculture purposes. In the city of Rome itself, the eleven...
Aqueducts were used to bring water to a city from a source like an ocean or a lake. This water could be used for all sorts of purposes, like public baths, irrigation, or household purposes.