Urban water supply automation – today and tomorrow

Abstract

Automation is a collection of a whole set of theories and methods to make a system work automatically as intended, in our case the urban water supply system. A critical feature of automation is the feedback principle: a sensor is measuring a certain variable, e.g. a concentration; a computer tests that the measurement is valid; a computer algorithm calculates and decides what should be corrected; a pump or valve or some other device transforms the decision to action. All of this is untouched by human hand. The ‘intention’, or the goal, must be provided to the controller. The key component of automation is the system that can represent any component or process in the water supply system and even the complete system. Automation technology always must be combined with a true understanding of people at all levels. Otherwise, there is a high risk for misunderstandings and failures. Three categories of problems are highlighted, where automation can contribute: uncertainty, feedback, and complexity. A key challenge is the handling of disturbances. Integrated management of the whole urban water cycle will be required in future urban areas to acquire sustainable operations. Automation is a crucial condition to make integration possible in complex systems. HIGHLIGHTS Dealing with uncertainties by online monitoring.; Using feedback at all levels to correct deviations from ‘normal’ operation.; Handling disturbances, particularly in time scales too fast or too slow for human interaction.; Operating complex highly interactive systems as well as small-scale decentralized systems.; Operation of the integrated urban water supply system.;

Keywords

• complexity
• control
• disturbances
• feedback
• integration
• uncertainty