| Summary: | Recently, some countries have been using treated wastewater to irrigate crops. In the administrative district of Kerbela, they also decided to borrow the experience of these countries, but on the condition that the treated wastewater would be environmentally safe in terms of sanitary and hygienic terms. It is necessary to comply with the requirements for the quality of water for irrigation of crops, and also not cause damage to the environment, soil and plants. From the treatment facilities of Kerbela 1000000 m3/day (1.16 m3/s) of water are formed, but the project provides for an increase to 400000 m3/day (4.63 m3/s) therefore, the selection of the diameter of the pipes for supplying water to the irrigation fields is provided for two flow rates. For preliminary calculation, the WaterCAD V8i simulation model was used, with the help of which the optimal pipe diameter and hydraulic characteristics of the flow were selected. Based on the results of the model, the optimal dimensions of the pipe diameter, modes of fluid movement and head loss are determined. The choice of pipe material was made from four types (ductile iron, GRP, concrete and plastic). The novelty of the work lies in the fact that for the first time a main scheme is being laid for transporting treated wastewater in this region and the hydraulic characteristics of water movement are being studied.
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