Calculated parameters for the reliability of the ring water distribution network with account of the changed water consumption rate

Summary

The water distribution network of a community is part of the water supply system and provides for the distribution of water upon the facilities and supply of water to consumers. One of the main indicators of the operation of a water distribution network is its reliability. Boundary parameters of the reliability of the network operation can be considered the operating time of the network in normal and emergency conditions. Due to the decrease in actual water consumption in populated areas, the water consumption in sections of the water distribution network decreases; therefore, the reliability indicators of its operation also change. Besides, with the introduction of the revised edition of CP 31.13330.2021, the calculated values of the water consumption in the network have decreased significantly, since the water consumption rates have been reduced by more than 15%. In accordance with these data, the reliability indicators of the water distribution network were calculated.

Key words

hydraulic design , loop water distribution network , network operation reliability , reliability parameters , water consumption rate

Design parameters of the household water consumption rates
and pressures in a water distribution network

Summary

Being a part of the water supply system, a water distribution network provides for the water distribution around a community and supply to the consumers. To ensure standard water supply to the consumers the minimum free pressures that guarantee uninterrupted water supply shall be provided in the water distribution network. With the introduction of the revised version of CP 31.13331 of 2021 «Water supply. External networks and structures», the principle of determining the design values of minimum free pressures at the entrance facility above the ground surface in the water distribution network of a community or city at the maximum household water consumption has changed. According to these data, the minimum free pressures in the water distribution network were calculated and their values were compared with the free pressures in the public water distribution networks that had been designed before 2021.

Key words

water supply network , hydraulic design , water consumption rate , free pressure , minimum required pressure , network operation parameters , required pressure