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A regional system for real-time forecasting
The entire course of the Po River in Piedmont has heterogeneouscharacteristics. The presence of both rivers (Po and Ticino) at their confluence are characterised by short concentration times and fluvial dynamics. The hydrological response is influenced by rain events, snow melt processes, reservoir and lake operational rules, exchanges with groundwater and the presence of other water intakes. The result: extreme hydrological events in the river basin. We developed a hydrological forecasting system in order to facilitate better management of water at the confluence.
The management of the extreme hydrological events in the Po River basin is based on an advanced real-time hydrological forecasting modelling system. It has been operational since 2000. This system can be considered the real precursor to all the Decision Support Systems (DSS) now operating in Italy.
The system has been implemented in the entire basin until its confluence with the Ticino River. This region includes the entire territory of the Piedmont and Aosta Valley Region as well as part of Liguria, Lombardia and the Switzerland portion. The system operates every day to support the technicians of the Regional Civil Protection Center in forecasting water levels and discharges in all the networks.
It is also able to support the management of predicted water scarcity conditions.
The modelling systemThe real-time forecasting system adopted the continuous hydrological simulation approach. It uses several modules of the one-dimensional computational software MIKE 11 (now MIKE HYDRO River) by DHI:
The same structure is adopted in many other real-time forecasting systems that are operative in Italy these days.
The management platformThe modelling system operates upon the MIKE OPERATIONS platform. MIKE OPERATIONS is a robust forecast management system that automatically collects all required data and information, performs data checking, runs forecast models and issues forecasts and early warnings.
Conditions of using the systemThe system is installed at the Civil Protection Center of the Piedmont Region (ARPA Piedmont) and is automatically operated to provide accurate forecasts of water levels and discharge in all river sections.
The meteorological input given to the system is supplied daily by the ARPA Piedmont meteo forecasting technicians. Meanwhile, the observation data comes from the regional meteo-hydrological monitoring network.
The system is configured to operate automatically. At the same time, the ARPA technicians can manage the system on the basis of specific needs, also simulating alternative scenarios.
Advantages of the approachThe Civil Protection Center is supported by the system for all the activities concerning the hydrological forecasting and management. The hydrological and hydraulic modelling allow personnel to set up alert procedures based not only on the comparison between rainfall and threshold values, but also on the predicted effects on the basin.
The deterministic and quantitative approach assures accurate forecasts coherently with the real-time needs. The same platform can also be used for the forecasting and management of drought conditions. The platform represents a complete support system for the overall management of the water resources in the entire basin.
Real-time forecasting of hydrological flood events
Comparison between operational scenarios
Unique system that can also be applied to the management of drought conditions
MIKE 11 (now MIKE HYDRO River)MIKE OPERATIONS
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