10. Proposing solutions to reduce water loss for water supply network in Bac Giang city

Abstract

Bac Giang water plant is designed with a capacity of 25,000 m³/day. However, at the moment, the plant is operating with an average capacity of about 28,000m³/day to 30,000m³/day. An average water loss rate of Bac Giang city is about 20%. To reduce the rate of water loss to 15% in 2020, it is necessary to reduce the water loss of Bac Giang water supply network. The paper presents the cause of water loss in Bac Giang water supply network and the measures to maintain low leakage such as: proactive leakage prevention; improve network inspection activities; network partition to manage traffic and pressure, detect leakage and reduce losses. The water supply network in the center of Bac Giang city is divided into 19 regions, the average number of connection points is 1.700. On each area, total flow meters are installed and pressure gauges are set up at the start of the network and at some of the most disadvantage points. Checking the flow and pressure for network partitioning solution using Epanet software shows that the water velocity in the pipe is within economic velocity range. The small total network length is easy to detect water leakage points to solve the problem promptly.