The maps illustrate the different layouts of two cities Roman Aqueduct and Modern Syphon, and the way that people provide water to their territory.
Overall, this area has witnessed several differences, most notably with the direction of the water flow as well as the way that it flows out to the ocean. Additionally, there has been a treatment plant next to the city in Modern Syphone which is replaced with the aqueduct bridge in Roman Aqueduct.
Regarding the Roman Aqueduct, the water runs in a straight way, which passes the conduit. Before providing water for the city, it goes across the aqueduct bridge. However, this changes in the latter city that the water supply runs through the conduit at first and then curves at the syphon. Then the supply water goes directly to the treatment plant.
Moreover, in both two cities, the water enters through the intake in the reservoir. After, the water supply significantly for those cities, it flows out to the sea.
