Water losses are present in all water supply system pipes. Their parameters and value vary depending on the constructional and functional features of the pipes (diameter, material, pressure, embedding environment, location, position etc.). The phenomenon is present in all water supply systems networks in Romania as well as globally. The water supply pipes within the regional water supply system are located in areas with diversified relief, from plateaus and hills to plains. The studies and researches were carried out in the geographical placement area of the Timişeşti-Iaşi pipeline. The geographic area studied is enclosed in Siret and Prut hydrographic basins. The paper aims to establish a correlation between the detection methods of water leaks from pipes and the areal relief features in Iaşi County. At the same time, it is highlighted the impact of the variation of the geographical relief characteristics on the water loss management on different type of pipes.
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