SOLUTION OF WATER SUPPLY OF GACKO MUNICIPALITY
The Municipality of Gacko, in order to solve the water supply of the population of this municipality, has announced a tender for the "Ideological solution for rehabilitation, reconstruction and development of the Gacko water supply system".
For the purposes of this project, we were engaged by the contractor "CPK" Banja Luka with the project task "Flow measurement with portable ultrasonic flow meters and pressure measurement with digital portable loggers on pipelines managed by JP "Vodovod" a.d. Gacko"
Therefore, it was necessary to measure the balance, that is, the amount of water on the water supply system managed by "Vodovod" a.d. Gacko, and the total length of the distribution network is about 70 mi.
Preparation for measurement
Flow measurement from the reservoar
Setting the parameters for measurement
The first phase of this project related to the measurement of the capacity of the spring "Vratlo" from which the municipality of Gacko is supplied, and the incoming and outgoing volumes of water at all reservoirs.
The distribution network in the city part of Gacko is organized into two supply zones: a higher zone that is supplied from the Gacko 2 reservoir and a lower zone that is supplied from the Gacko 1 reservoir. In addition to these two reservoirs, measurements were also made in the Samobor, Kula and Stepen reservoirs.
In this measurement phase, it was necessary to measure the flow of water at the entrances to the tanks and the water leaving the tanks, as well as the pressures on the water supply network. Flow and pressure measurements were carried out for each specified measuring point 24 hours continuously, rounding the measurement units and including them so that the results can be used for the calculation of water balances and the creation of a mathematical model of the water supply system with hydraulic supply calculation.
In addition, for this phase of the works, it was necessary to perform measurements with mobile ultrasonic flow meters at consumers, namely:
- individual housing in the city area,
- individual housing rural area,
- collective housing - buildings (newer and older constructions),
- public institutions,
- big economy companies,
- small economy companies
The flow measurement was carried out during this phase of the project at 38 measuring points with six ultrasonic flow meters, and pressure measurement with digital loggers at 10 measuring points.
The work on measuring the flow and pressure, with the preparation of the measuring points, lasted continuously for eleven days. For each measurement point, the measurement cycle lasted 24 hours, with the default measurement interval for both measurement parameters being 1 minute.
The measurement was carried out in extremely difficult conditions, because during this work there were partial reductions in the water supply system. With the understanding of the management of KP "Vodovod" Gacko, we adjusted the reductions, in order to have conditions for measuring rounded hydraulic units.
For this measurement phase, we also had great, selfless help from the employees of KP "Vodovod" a.d. Gacko. In addition to helping us get acquainted with the water supply network and the functioning of the water supply system, they also provided us with the necessary technical assistance.
With their help our NMAqua team fully fulfilled all requirements from the project assignment.
The second phase of the project in the coming period foresees additional measurements on the water supply system, i.e. pipelines, where mathematical calculations show the existence of differences, i.e. losses. It will also be necessary to carry out testing and detection of losses on certain parts of the water supply system and finally final measurements after all analyzes and reduction of losses on the water supply network of the municipality of Gacko.
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