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The Sustainable Pumping Rate Concept: Lessons from a Case Study in Central Italy

机译：可持续抽水率概念：意大利中部案例研究的教训

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摘要

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.
机译：可持续抽水率（SPR）一词的定义是在不开采含水层的情况下可以无限期维持的最大抽水率，它与安全产量（SY）的概念不同，后者也考虑了与更广泛概念相关的方面可持续性。对位于意大利中部的冲积含水层Petrignano d'Asisi的案例研究的SPR评估表明，有必要可靠地估算含水层的全球水预算，特别是在不受干扰的情况下的补给；但是，后者还不够，因为SPR还会受含水层的几何形状，水力传导率模式，提取引起的充/放电比变化的影响，等等。所有这些方面都通过在非扰动条件（1974年）和开采条件（1998年至2004年）下均已校准的数值流模型进行了分析。稳态建模结果表明，在局部和全局范围内，补给与抽象之间的关系是估算长期SPR的关键点。此外，由于可能需要在短期内（例如在干旱期间）过度开采含水层，因此还必须在瞬态条件下对SPR进行估算，以便考虑到枯竭和连续恢复的特征时间。

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  • 来源
    《Ground water》 |2010年第2期|217-226|共10页
  • 作者

    Emanuele Romano; Elisabetta Preziosi;

  • 作者单位

    CNR, Water Research Institute, Area della Ricerca di Roma 1-Montelibretti, via Salaria km 29,300, PB 10, 00016 Monterotondo Stazione, Rome, Italy;

    CNR, Water Research Institute, Area della Ricerca di Roma 1- Montelibretti, via Salaria km 29,300, PB 10, 00016 Monterotondo Stazione, Rome, Italy;

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