During 28 years of work, EHTING has developed and  successfully implemented the „Methodology of Water  Loss Reduction and Efficiency Upgrade in Water  Supply Systems“. In early 90’s, EHTING was awarded  the PLEDGE – Recommendation of Quality for  this Methodology by the then „Business Alliance of  Water Supply and Sewerage of Yugoslavia“. That was  the beginning of work on the methodology.


Nowadays,  the Integrated Water Supply Information System  (IWSIS) is operative and fully applied, based on a  unique database which communicates with four segments  of the system: water consumption processing,  mathematical modelling, GIS and SCADA. This is the  programme basis for application of the Methodology,  but the essence is in the professional work of our  experts in the field and in the office, together with  client’s staff.


Expected results:


  • Possibilities and needs strategy for the water supply system development in the future;
  • Long-term solution for water supply;
  • Defining the rehabilitation strategy for the existing water supply network, pumping stations, others
  • Categorization of pipelines by function, conditions of exploitation and other parameters, as well as proposal of measures for achieving pipeline planned category;
  • Realistic view of future consumption and water needs, taking into account planned development, planned work on the system, activities to reduce water losses and future water prices;
  • Reducing the consumption of electricity in the system and reducing the costs for electricity;
  • Improvement of the measurement and data acquisition system, operational use of data, methodology for regular verification and control of measurement data;
  • Defining a sustainable strategy to reduce water losses (unregistered consumption);
  • Improving the water supply system management, the possibility of creation of consumption zones
  • Necessary improvements to the institutional framework, institutional capacity, including the professional and technical capacities of the puc.

IWSIS is a set of rules and procedures

that specifically  link certain parts of the information system to the  water supply system in PUC. Most utility companies  already have parts of the information system, most  often a customer base and service records, however,  these parts are not interconnected, which practically  means that individual data is kept in multiple  locations in completely independent databases or information  entities, and can lead to a situation where  data on the same object are different in different databases.  The usefulness of such data is extremely limited.  IWSIS assumes that one information is stored  only in one place, and that other parts of the information  system, if needed, download it from the base  where it is stored.


Business Information System

Technical Information System

  1. Recording and billing of consuption
  2. Financial accounting
  3. Material accounting
  4. Commodity accounting
  5. Fixed assets
  6. Cashier
  7. ...
  1. GIS
  2. Database and statistics of malfunctions in the water supply system
  3. Longitudal profiles
  4. Creation of conditions and consents
  5. Setting standards
  6. Maintenance procedures
  7. ....


Software for Mathematical(Hydraulic) Modeling

  1. Measurements
  2. Data transfer
  3. Data storage
  4. Statistics
  5. Alarms
  6. ....
  1. Hydraulic аnalysis
  2. Locating zones with increased losses
  3. Prediction of water supply system emergencies (war games)
  4. Planning
  5. ....

Specific objectives of IWSIS and application of Methodology:


  • Creation of geographic information system for water supply system (gis);
  • Creating a customer database with the ability to analyze consumption and connect to gis;
  • Developing consumption zones for the water balance calculation (dmas);
  • Enabling pressure management in the water supply network;
  • Development of a mathematical model linked to gis and customer database;
  • Design of scada system for remote control and management with possibilities of measurement analysis and connection to mathematical model, as well as controlled data archiving;
  • A comprehensive assessment of the existing condition of the water supply system;
  • Defining the required minimum levels of services and project criteria;
  • Defining the water supply system development scenarios;
  • Defining a strategy for reducing water losses (unregistered consumption);
  • Defining the current and future technical, economic and financial indicators of the system and the strategy of achieving goals;
  • Defining priorities and construction phases.

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