The work carried out within the framework of this thesis entitled "Tool of assistance to the diagnosis of the drinkable water supply network for the town of Chisinau by space and temporal analysis of the hydraulic dysfunctionments" concerns the development of a model of the future tool of assistance to management infrastructures and applied of the drinkable water supply network of the town of Chisinau Moldavie (1200 km of drains - 800 000 inhabitants). This research task deals with two main topics: - "Diagnosis": It acts by a successive and recursive analysis (using temporal requests). To detect the simultaneity of two or several observations (demonstrations of dysfunction). The dysfonctionments can occur in the same laps of time and are examined from topological hydraulic relations and being able to exist between the sites where the dysfunctions are observed. The graph and more particularly the Petri net. are used and make possible to pass from an analysis space time between 2 or m events to an analysis integrating causality between 2 events. - "Decision-making aid": An "emergency level" is associated to each section of the network in order to ensure the follow-up of the rehabilitation of the infrastructures. The assistance with the rehabilitation with the determination of priority zones. The gestion maintenance of the network for the of the network can be achieved. This emergency level is quantified by using a Hierarchical Method Multicriterion developed by SAATY (considering criteria technical. economic. social. environmental as well as the policy of the managers). Developed methodology uses various tools and resulting methods: temporal data bases. Space analysis and SIG. cognitive reasoning and hydraulic modeling of the flows. theory of graphs and Petri net. The tool is tested on a pilot sector of Chisinau the city. which represents approximately 7% of the drinkable water supply network in the city. The whole of the network will be taken into account later when the validation of this portion of network will be made by the engineering departments of the town of Chisinau (Moldavie).
