Saltwater intrusion in the unconfined coastal aquifer of Ravenna (Italy): A numerical model

Giambastiani, Beatrice Maria Sole; Antonellini, Marco; Essink, Gualbert Oude; Stuurman, Roelof

doi:10.1016/j.jhydrol.2007.04.001

Cited by 152 publications

(74 citation statements)

References 8 publications

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“…The maximum value for the mean of x toe (i.e., the leading edge of the intrusion) is reached at y crit = 3b/2 + c, since the domain is symmetric. The maximum intrusion extent was equal to 303.6 m for the selected case study; this value is consistent with those typically observed for the area of Ravenna, and with results reported in numerical studies of the effects of subsidence on SI [35]. The uncertainty in the hydrogeological parameters resulted in a standard deviation of x toe with a maximum of ~50 m (i.e., more than the 15% of the correspondent mean value).…”

Section: Resultssupporting

confidence: 88%

“…The province of Ravenna, bounded to the north by the Comacchio Valleys and to the south by the city of Cervia, is characterized by a high population, about 350,000 inhabitants whose density more than triples during the summer. In this area, many unpermitted and poorly-constructed wells have been drilled by bathing establishments and farms, resulting in environmental damage [35]. Anthropogenic activities have altered the original ecosystem and now the once sandy coastline is characterized by river and canal mouths, lagoons, pine forests (e.g., San Vitale and Classe), heavily urbanized areas (e.g., the cities of Marina Romea and Cervia), industrial facilities, and reclaimed agricultural lands [36].…”

Section: Characterization Of the Area Of Interestmentioning

confidence: 99%

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Saltwater Intrusion in Coastal Aquifers: A Primary Case Study along the Adriatic Coast Investigated within a Probabilistic Framework

Felisa

Ciriello

Federico

2013

Water

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Abstract:Environmentally sensitive areas along coastlines may be adversely affected by saltwater intrusion (SI), a condition which can be worsened by extensive groundwater extraction. Given the uncertainty of problem parameters, the risk of contamination of the vegetation capture zone needs to be cast in a probabilistic framework. In order to exemplify real situations existing along the Adriatic coast of Emilia-Romagna, a case study involving a pinewood strip and a well field drawing freshwater from an unconfined coastal aquifer was examined. On the basis of a widely adopted sharp interface formulation, key hydrogeological problem parameters were modeled as random variables, and a global sensitivity analysis was carried out to determine their influence on the position of the interface. This analysis utilized an efficient model reduction technique based on Polynomial Chaos Expansion. The risk that saltwater intrusion affects coastal vegetation was then evaluated via a two-step procedure by computing the probability that (i) the leading edge of the saltwater wedge reaches the sensitive area in the horizontal plane, and (ii) the freshwater/saltwater interface reaches the capture zone. The influence of the design parameters of the well field on the overall probability of contamination was investigated, revealing the primary role of the pumping discharge in the examined configuration.

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Section: Resultssupporting

confidence: 88%

Section: Characterization Of the Area Of Interestmentioning

confidence: 99%

Saltwater Intrusion in Coastal Aquifers: A Primary Case Study along the Adriatic Coast Investigated within a Probabilistic Framework

Felisa

Ciriello

Federico

2013

Water

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“…The presence of dunes has to be considered very carefully due to their role in coastal defense as protective natural features, providing sediment supply to beaches and protecting the inland from storm surges. Several studies have also demonstrated the relationship between dunes and ground saltwater intrusion [1,2], highlighting the importance of dunes for coastal agriculture systems. Nonetheless, the severe coastal erosion affecting numerous beaches and dune systems around the world is a large threat to their stability.…”

Section: Introductionmentioning

confidence: 99%

Using Unmanned Aerial Vehicles (UAV) for High-Resolution Reconstruction of Topography: The Structure from Motion Approach on Coastal Environments

et al. 2013

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Abstract:The availability of high-resolution Digital Surface Models of coastal environments is of increasing interest for scientists involved in the study of the coastal system processes. Among the range of terrestrial and aerial methods available to produce such a dataset, this study tests the utility of the Structure from Motion (SfM) approach to low-altitude aerial imageries collected by Unmanned Aerial Vehicle (UAV). The SfM image-based approach was selected whilst searching for a rapid, inexpensive, and highly automated method, able to produce 3D information from unstructured aerial images. In particular, it was used to generate a dense point cloud and successively a high-resolution Digital Surface Models (DSM) of a beach dune system in Marina di Ravenna (Italy). The quality of the elevation dataset produced by the UAV-SfM was initially evaluated by comparison with point cloud generated by a Terrestrial Laser Scanning (TLS) surveys. Such a comparison served to highlight an average difference in the vertical values of 0.05 m (RMS = 0.19 m). However, although the points cloud comparison is the best approach to investigate the absolute or relative correspondence between UAV and TLS OPEN ACCESSRemote Sens. 2013, 5 6881 methods, the assessment of geomorphic features is usually based on multi-temporal surfaces analysis, where an interpolation process is required. DSMs were therefore generated from UAV and TLS points clouds and vertical absolute accuracies assessed by comparison with a Global Navigation Satellite System (GNSS) survey. The vertical comparison of UAV and TLS DSMs with respect to GNSS measurements pointed out an average distance at cm-level (RMS = 0.011 m). The successive point by point direct comparison between UAV and TLS elevations show a very small average distance, 0.015 m, with RMS = 0.220 m. Larger values are encountered in areas where sudden changes in topography are present. The UAV-based approach was demonstrated to be a straightforward one and accuracy of the vertical dataset was comparable with results obtained by TLS technology.

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“…A numerical model was used here to quantify these effects on the density-dependent groundwater flow, hydraulic head and salinity distribution, seepage and salt load fluxes to surface water system. The simulation showed that over the last century artificial subsidence and heavy drainage started the salinization process in the study area and a relative sea level rise will accelerate the increase in salt load in the coming decades, affecting the entire aquifer [18]. In the last decades coastal dunes which protects coastline, have been removed or damaged by human activities in the Northern Adriatic Coast, Ravenna Area in Italy.…”

Section: Introductionmentioning

confidence: 96%

“…Except Gujarat and little part of Maharashtra the ingression of saline water is severe in the eastern coast in comparison to west coast. Field-based studies have been conducted by various researchers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][18][19][20][23][24][25][26][27][30][31][32]34]. The nature and position of interface and delineation of fresh groundwater and saline groundwater bodies at the aquifer of Digha beach at Purba Midnapur was studied.…”

Section: Introductionmentioning

confidence: 99%

Remedial Measures for Saline Water Ingression in Coastal Aquifers of South West Bengal in India

Maity¹,

Das²,

Das³

2018

MOJES

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Purba Midnapur, a coastal district of West Bengal in India, is under a serious threat concerning the deterioration of groundwater due to seawater encroachment. The upper soil horizon of Purba Midnapur consists of alternating deposits of clay and sand of marine origin. As with all marine deposits, rounded grains and high porosity are dominant characteristics. The coastal line upto 40 km wide tract is being contaminated due to the movement of saline water into aquifers of fresh water. Thus groundwater has become unfit for domestic uses and irrigation purpose. Due to extraction of groundwater, the water table is distorted like a cone of depression resulting in the associated risk like defunct well and making the abstraction uneconomical due to increased lift. Therefore immediate measures are required to control saline water ingression into the coastal aquifers. This paper suggests some measures for controlling saline water ingression in the area concern.

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Saltwater intrusion in the unconfined coastal aquifer of Ravenna (Italy): A numerical model

Cited by 152 publications

References 8 publications

Saltwater Intrusion in Coastal Aquifers: A Primary Case Study along the Adriatic Coast Investigated within a Probabilistic Framework

Saltwater Intrusion in Coastal Aquifers: A Primary Case Study along the Adriatic Coast Investigated within a Probabilistic Framework

Using Unmanned Aerial Vehicles (UAV) for High-Resolution Reconstruction of Topography: The Structure from Motion Approach on Coastal Environments

Remedial Measures for Saline Water Ingression in Coastal Aquifers of South West Bengal in India

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