This work aims at integrating the understanding of the river geomorphic dynamic into the planning of reservoir operation rules. The case study is a 112 km long reach of the Po river in Italy, from Piacenza to Boretto. The Isola Serafini (IS) gate has served a large run-of-the-river hydroelectricity plant since 1962. The dam blocks a relevant amount of sediments and is the cause, together with intense sand mining, for the river bed incision immediately downstream that has made several navigation and irrigation devices unusable during low flow periods, leading to expensive and recurrent works to restore their functionality. The operational rule of the IS gate was modelled using 4 parameters and a number of experiments were simulated adopting alternative operating policies over a 10- year period. A 1D hydraulic numerical model with mobile bed has been used to estimate bed degradation trends. The results show that there is space for a meaningful trade-off between the conflicting objectives of hydropower production and reduction of river bed degradation. The analysis provides operative rules able to effectively tackle river bed incision with moderate loss in hydropower production.

Integrating mobile bed numerical modeling into reservoir planning operations: The case study of the hydroelectric plant in Isola Serafini (Italy)

BIZZI, SIMONE;DENARO, SIMONA;DINH, NHAT QUANG;SONCINI SESSA, RODOLFO
2013-01-01

Abstract

This work aims at integrating the understanding of the river geomorphic dynamic into the planning of reservoir operation rules. The case study is a 112 km long reach of the Po river in Italy, from Piacenza to Boretto. The Isola Serafini (IS) gate has served a large run-of-the-river hydroelectricity plant since 1962. The dam blocks a relevant amount of sediments and is the cause, together with intense sand mining, for the river bed incision immediately downstream that has made several navigation and irrigation devices unusable during low flow periods, leading to expensive and recurrent works to restore their functionality. The operational rule of the IS gate was modelled using 4 parameters and a number of experiments were simulated adopting alternative operating policies over a 10- year period. A 1D hydraulic numerical model with mobile bed has been used to estimate bed degradation trends. The results show that there is space for a meaningful trade-off between the conflicting objectives of hydropower production and reduction of river bed degradation. The analysis provides operative rules able to effectively tackle river bed incision with moderate loss in hydropower production.
2013
Water and Society 2013, At New Forest, UK, Volume: Water and Society II
9781845647421
9781845647421
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/962596
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