Natural factors play a decisive and determinative role in the historical, cultural and social phenomena of any society. In the water-scarce land of Iran throughout history, the aqueduct has been the most important way of exploiting water resources, which has been preserved, maintained and used and exploited collectively. Shared water resources and their consequences and long-term investment in the construction and maintenance of aqueducts required long-term plans, which could not be combined with individualism and competitive culture, and contrary to some Iranian writers and intellectuals, not compatible. The construction of the aqueduct is the result of a long-term, peaceful and supportive participatory culture, and its existence has strengthened and reproduced this culture. This article deals with the tax on the use of water or the alimony of the aqueduct, which was the clever foresight of our ancestors towards the financial self-sufficiency of the aqueduct. In traditional irrigation systems, alimony is the sum of money spent during water circulation circuits throughout the irrigated year, which includes the wages of the irrigation group and the ancillary expenses of the water source. In the continuation of the work, the alimony of several aqueducts from different parts of Iran is also mentioned.