Abstract
Lake Trasimeno is a closed lake in Central Italy and in historically its water level has been affected by wide fluctuations mostly depending on the climate. The lake has suffered many water crises due to water scarcity and in recent decades, droughts have also severely affected the economic and environmental situation. The aim of this study was to analyze the possibility of limiting these severe level fluctuations by evaluating of feasible water resource management policies that could also reduce the environmental stress of this area. Therefore, a specific decision support system (DSS) has been developed in order to simulate different scenarios for the entire water system of the Trasimeno area. In particular, the hydrological model implemented in the DSS allowed for the simulation and validation of different management policy hypotheses for the water resource in order to mitigate environmental and water crises for the Lake Trasimeno. Results indicated that it is possible to transfer a certain amount of water from nearby reservoirs without affecting the availability of the resource for specific users. In this way, Lake Trasimeno can benefit both from an increase in water levels in the lake, so a possible better situation in quantitatively and qualitatively.
Highlights
Lake Trasimeno is a shallow lake of orogenic origin, dating back one million and seven hundred years
This procedure allows for evaluation of the effects of water resource management policies on the specific environmental problem of Lake Trasimeno, which is closely linked to the fluctuation of water levels of the lake and to the possibility of increasing the water exchange
The application of the SimBaT model to the case study provides an analysis of the availability of water resources in the global system of the Casanova and Montedoglio reservoirs, in order to increase the annual water volume inflow into Lake Trasimeno
Summary
Lake Trasimeno is a shallow lake of orogenic origin, dating back one million and seven hundred years. Its origin is mainly alluvial and tectonic because of the crustal movements that occurred during the mid-Quaternary period, involving the western side of Umbria. Many researchers have supposed that crustal movements brought about the separation of Val di Chiana from the nearby depression occupied by the lake [1]. This can be observed from Leonardo’s famous map [2], in the Royal. The natural catchment basin was enlarged in years 1960–1962, allowing the lake to rapidly recover from drought
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