How did the Aztecs modify their natural environment to develop a successful civilization centered on an island on Lake Texcoco?

By 1500, the Aztec Empire stretched from the Pacific Ocean to the Gulf of Mexico, controlling 28 million people. By then, Tenochtitlan and other nearby islands has fused into one great capital city, with an estimated population of 400,000. They constructed a system of dams and aqueducts to control lake levels and bring in fresh water from the mainland to supplement the springs on the islands since then all else follows like their source of food through the system of hydraulic agriculture, draining swampland and creating artificial islands to grow food for the city. Making their civilization a successful one.