Managing groundwater rise : experimental results and modeling of water pumping from a quarry lake in Milan urban area (Italy)
Articolo
Data di Pubblicazione:
2004
Citazione:
Managing groundwater rise : experimental results and modeling of water pumping from a quarry lake in Milan urban area (Italy) / M. Avanzini, A. Pagotto, G.P. Beretta. - In: ENVIRONMENTAL GEOLOGY. - ISSN 0943-0105. - 45:5(2004 Mar), pp. 600-608. [10.1007/s00254-003-0918-7]
Abstract:
An innovative approach to solve the
problem of lowering water table was carried out in a quarry lake south of the city of Milan (northern
Italy): the project, based upon pumping out water at a rate of 1,000 L/s can be considered a strategic medium to long-term solution to hinder the rise of
groundwater level interfering with underground structures (foundation, construction, subway) in urban areas. The basic idea is to pump a high
groundwater rate as close as possible to the stagnation point of the piezometric depression located in the city. After a pilot-test was carried out
in November 1998, experimental activities started in July 2001 and lasted one year; water withdrawal was
discharged into artificial channels used in agricultural practice. Maximum drawdowns measured in the quarry lake by the monitoring network resulted in more than 5 m, and a significant
drawdown was registered up to 1.5 km of distance from the quarry in the important historical site of
Chiaravalle Abbey, threatened by groundwater rise.
The results of this pumping activity confirm the importance of the project, its lower cost compared with traditional solutions (such as drainage by wells) and remarkable effects on the improvement of surface water quality. A groundwater model was implemented to evaluate further scenarios of
discharge rate and pumping location, too.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
groundwater rise ; drainage ; quarry lake ; drawdown ; water improvement
Elenco autori:
M. Avanzini, A. Pagotto, G.P. Beretta
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