Chinese and Greek ancient urban hydro-technologies: similarities and differences

China and Greece are the ancient civilizations that took place in the east and west. Subsequently, both civilizations, creatively in the ancient east and west, have deeply influenced the regional civilizations and the world simultaneously. Water management has played a significant role in both civilizations and it has been demonstrated on the evidences that many principles and technologies were generated originally. Also, they were developed by both the ancient Chinese and Greeks through their long histories. As a result, they have significantly influenced the ancient world broadly, of which some of them are still functioning up till this present time. The study constituents the following: methodology, hydrogeology, aqueducts and water impounds, water and wastewater mains, runoff management, agricultural irrigation, as well as the use of water for recreation purposes. Usually, the urban hydro-technologies reflect a progressive situation in water management. Thus, both civilizations have also achieved urban water management as a case study. Therefore, for the purpose of understanding the role of water management in ancient civilizations of which the similarities and differences beyond the large geographic space were generated originally, and which also featured the basic principle of water management in the human societies beyond the civilizations, a comparison of urban hydro-technologies was selectively developed through the long history of ancient Chinese and Greek civilizations.