| Title | Cross-Calibration of Two Independent Groundwater Balance Models and Evaluation of Unknown Terms: The Case of the Shallow Aquifer of "Tavoliere di Puglia" (South Italy) |
| Abstract | Groundwater represents an essential water resource for human purposes, mainly in
those areas characterised by a scarcity of surface water and dry climate. Consequently, tools for
assessing the groundwater balance are fundamental for its suitable management. The conventional
groundwater balance equation, which considers all the natural and human-induced terms
of the balance, such as rainfall, withdrawals, irrigation, etc., sometimes lacks of some
important terms. One of the terms of the balance that is most difficult assess is the volume
of water exchanged with other neighbouring water bodies (subsurface inflow/outflow). In this
case, the estimation must be considered as a poor approximation. In this paper, a novel
methodology is proposed that is capable of significantly increasing the accuracy of the
groundwater balance when subsurface inflows and outflows are unknown. The improvement
is accomplished by comparing two corresponding time series of annual groundwater balances
assessed by means of different balance models. The first time series is evaluated by means of
the conventional balance equation and the second one by directly estimating the groundwater
volumes by means of geostatistical methods. Both these models are supposed to lack specific,
even though different, information. Their comparison through simple statistical tools allows
them to be calibrated and to recover missing average information. A study case is presented
considering the inflow/outflow term and the specific yield as missing information for the
conventional and the geostatistical approaches, respectively. The study area is the shallow
porous aquifer of the Tavoliere di Puglia (South Italy). |
| Source | Water resources management 31 (1), pp. 327–340 |
| Keywords | Groundwater management . Water balance . Geostatistics . Model calibration |
| Journal | Water resources management |
| Editor | Reidel, Boston, Paesi Bassi |
| Year | 2017 |
| Type | Articolo in rivista |
| DOI | 10.1007/s11269-016-1527-z |
| Authors | Giuseppe Passarella, Emanuele Barca, Donato Sollitto, Rita Masciale, Delia Evelina Bruno. |
| Text | 379164 2017 10.1007/s11269 016 1527 z Scopus 2 s2.0 84991782210 ISI Web of Science WOS WOS 000393777100022 Groundwater management . Water balance . Geostatistics . Model calibration Cross Calibration of Two Independent Groundwater Balance Models and Evaluation of Unknown Terms The Case of the Shallow Aquifer of Tavoliere di Puglia South Italy Giuseppe Passarella, Emanuele Barca, Donato Sollitto, Rita Masciale, Delia Evelina Bruno. IRSA CNR Water Research Institute of the National Research Council, Department of Bari, Viale De Blasio, 5, 70125 Bari, Italy Groundwater represents an essential water resource for human purposes, mainly in those areas characterised by a scarcity of surface water and dry climate. Consequently, tools for assessing the groundwater balance are fundamental for its suitable management. The conventional groundwater balance equation, which considers all the natural and human induced terms of the balance, such as rainfall, withdrawals, irrigation, etc., sometimes lacks of some important terms. One of the terms of the balance that is most difficult assess is the volume of water exchanged with other neighbouring water bodies subsurface inflow/outflow . In this case, the estimation must be considered as a poor approximation. In this paper, a novel methodology is proposed that is capable of significantly increasing the accuracy of the groundwater balance when subsurface inflows and outflows are unknown. The improvement is accomplished by comparing two corresponding time series of annual groundwater balances assessed by means of different balance models. The first time series is evaluated by means of the conventional balance equation and the second one by directly estimating the groundwater volumes by means of geostatistical methods. Both these models are supposed to lack specific, even though different, information. Their comparison through simple statistical tools allows them to be calibrated and to recover missing average information. A study case is presented considering the inflow/outflow term and the specific yield as missing information for the conventional and the geostatistical approaches, respectively. The study area is the shallow porous aquifer of the Tavoliere di Puglia South Italy . 31 Published version https //link.springer.com/content/pdf/10.1007/s11269 016 1527 z.pdf 2017 Water Resources Management Passarella et al. 2017_WRM_Passarella et al.pdf Articolo in rivista Reidel 0920 4741 Water resources management Water resources management Water resour. manag. giuseppe.passarella PASSARELLA GIUSEPPE emanuele.barca BARCA EMANUELE rita.masciale MASCIALE RITA deliaevelina.bruno BRUNO DELIA EVELINA TA.P04.005.008 Integrazione di metodologie per il monitoraggio e la modellizzazione per la gestione delle risorse idriche |
