Abstract
This article investigates the effect material type of pipe on water quality convey systems in different time periods. A comparative study is conducted between two common types of pipes in water transmission, i.e. ductile iron pipes with cement lining and polyethylene pipes. In this article, the physical and chemical properties of water was studied. Then, the two types of studied pipes, i.e. ductile iron pipes with cement lining and PE, are introduced and their characteristics are reviewed. Sampling at different time points of the water passing through these two different types of water transmission pipes has been done to check the quality parameters. parameters such as; The amount of organic and inorganic chemicals, microbes and bacteria, pH, dissolved oxygen in water and other important parameters are measured. The results of the measurements are analyzed so that the effect of the type and material of the pipe on the quality of water in different time periods is investigated accurately. In this article, the statistical differences and the possible causes of these differences are discussed. This article provides pipeline designers and decision makers in the field of hydrology with important information for choosing the best type of pipe in water transmission systems and can help improve water quality and water resources productivity.