Effective January 1, 1952, the sewerage system of the city, with all additions and improvements to the system, is combined with the water system of the city, and on and after that date shall be a part of and belong to the water system. The combining of the systems is believed to be for the best interests of the city by the city council, for the reasons, among others, that it will facilitate sale of bonds for anticipated future improvements and will make more economical and practical the administration of the two systems.