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The Sustainable Pumping Rate Concept: Lessons from a Case Study in Central Italy
Author(s) -
Romano Emanuele,
Preziosi Elisabetta
Publication year - 2010
Publication title -
groundwater
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 94
eISSN - 1745-6584
pISSN - 0017-467X
DOI - 10.1111/j.1745-6584.2009.00628.x
Subject(s) - groundwater recharge , aquifer , hydraulic conductivity , sustainable yield , transient (computer programming) , environmental science , sustainability , hydrology (agriculture) , geology , yield (engineering) , flow (mathematics) , soil science , groundwater , mathematics , geotechnical engineering , computer science , materials science , geometry , ecology , biology , metallurgy , soil water , operating system
The term sustainable pumping rate ( SPR ) is defined as the maximum pumping rate that can be maintained indefinitely without mining an aquifer, and is different from the concept of safe yield ( SY ), which takes into account also aspects related to the much wider concept of sustainability. The assessment of the SPR for the case study of Petrignano d'Assisi, an alluvial aquifer located in Central Italy, shows the need for a reliable estimate of the global water budget of the aquifer, particularly of the recharge under undisturbed conditions; however, the latter is not sufficient, because the SPR is affected also by the geometry of the aquifer, the hydraulic conductivity pattern, the variation of recharge/discharge ratio induced by the abstractions, and so on. All these aspects are analyzed by means of a numerical flow model calibrated both under undisturbed conditions (1974) and under exploitation conditions (1998 to 2004). The steady‐state modeling results show that the relation between recharge and abstractions both at local and global scale is a key point in order to estimate a long‐term SPR . Moreover, as it could be necessary to overexploit the aquifer for short periods, e.g., during drought episodes, the estimate of SPR must be performed also in transient conditions, in order to take into account the characteristic time of depletion and the successive recovery.