Review of Utilization Management of Groundwater at Risk of Salinization

Polemio, M.

doi:10.1061/(asce)wr.1943-5452.0001278

Cited by 27 publications

(15 citation statements)

References 184 publications

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“…The latter is a key issue in coastal governance, since it must face growing population demand. Thus, salinisation processes, subsidence, and/or flood damages are favoured [7][8][9][10][11][12], and in this respect, the Mediterranean coastal areas are prone to seawater intrusions [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Hydrostratigraphic Framework and Physicochemical Status of Groundwater in the Gioia Tauro Coastal Plain (Calabria—Southern Italy)

Cianflone

Vespasiano

Rosa

et al. 2021

Water

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In this study, we analysed the Gioia Tauro Plain (Tyrrhenian coast, southern Italy) in terms of hydrostratigraphy and the physicochemical status of groundwater. We investigated the hydrostratigraphic framework of the area identifying a deep aquifer (made by late Miocene succession), an aquitard (consisting of Pliocene clayey and silty deposits) and a shallow aquifer (including Late Pleistocene and Holocene marine and alluvial sediments) using subsoil data (boreholes and geophysics). Our reconstruction showed that the structural geology controls the spatial pattern of the aquitard top and the shallow aquifer thickness. Furthermore, we evaluated the hydraulic conductivity for the shallow aquifer using an empirical method, calibrated by slug tests, obtaining values ranging from 10−4 to 10−5 m/s with a maximum of 10−3 m/s located close to inland dune fields. The piezometric level of the shallow aquifer recorded a significant drop between the 1970s and 2021 (−35 m as the worst value). It is the effect of climate and soil use changes, the latter being the increased water demand for kiwi cultivation. Despite the overexploitation of the shallow aquifer, shallow groundwater is fresh (736 µS/cm as mean electrical conductivity) except for a narrow coastal area where the electrical conductivity is more than 1500 µS/cm, which can be due to the seawater intrusion. What was more complex was the physicochemical status of the deep aquifer characterised by high temperature (up to 25.8 °C) and electrical conductivity up to 10,520 µS/cm along the northern and southern plain boundaries marked by tectonic structures. This issue suggested the dominant role of the local fault system that is likely affecting the deep groundwater flow and its chemical evolution.

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Section: Introductionmentioning

confidence: 99%

Hydrostratigraphic Framework and Physicochemical Status of Groundwater in the Gioia Tauro Coastal Plain (Calabria—Southern Italy)

Cianflone

Vespasiano

Rosa

et al. 2021

Water

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“…Different hazards driven by natural processes and/or anthropogenic activities threaten coastal areas [5]. For this reason, the management of coastal zones and their sustainable development have been important topics for the last few decades [6][7][8][9][10][11]. The increasing anthropic pressure on coastal areas amplifies the negative impact of land use and hydrological changes, as well as groundwater overexploitation.…”

Section: Introductionmentioning

confidence: 99%

Different Ground Subsidence Contributions Revealed by Integrated Discussion of Sentinel-1 Datasets, Well Discharge, Stratigraphical and Geomorphological Data: The Case of the Gioia Tauro Coastal Plain (Southern Italy)

et al. 2022

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Groundwater is the main water supply for agricultural and industrial needs in many coastal plains worldwide. Groundwater depletion often triggers land subsidence, which threatens manmade infrastructure and activities and aggravates other geohazards. We applied a multi-temporal interferometric synthetic aperture radar technique to Sentinel-1 datasets to detect ground motion in the Gioia Tauro plain (Calabria, Southern Italy) from 2018 to 2021. The InSAR data were analysed through the integrated use of groundwater head, stratigraphical and geomorphological data, and land use information to distinguish the potential subsidence divers. The results show that subsiding areas, with a mean rate of about 10 mm/yr, are in the middle of the plain, and their location is influenced by the spatial distribution of compressible sediments included in the shallow aquifer. Furthermore, the subsidence arrangement is spatially accordant with the main groundwater depression area, which can be ascribed to the ongoing and increasing water pumping for predominantly agricultural usage. We also observed that subsidence (up to 10 mm/yr) affects the western dock of the Gioia Tauro harbour, in front of which, in very shallow water, are two submarine canyon heads already affected by slides in the past.

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“…Around 70% of the world's population lives in coastal areas where very high population density is observed; this percentage shows widespread increasing trend causing the increase of water demand (McDonald et al, 2011; Wada er al, 2016, Abd-Elaty et al, 2021a) ). Combination of increase demand and CC exposes coastal groundwater to increasing salinization risks for SWI, especially in water scarce regions (Polemio & Zu anò, 2020). SWI can worst due to human activities and natural process by reduction in groundwater recharge, over pumping, tidal effects, ocean and seismic waves, dispersion effects, and CC including sea level rise (SLR) (Bear et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…The use of numerical modeling supporting the design and selection of management criteria is a reliable choice in the case of groundwater at salinization risk (Polemio & Zu anò, 2020). Abd-Elhamid et al, (2016) investigated the effect of different SLR scenarios on the coastal region of Nile delta, Egypt using SEAWAT.…”

Section: Introductionmentioning

confidence: 99%

Environmental coastal management for groundwater resources using different aquifer bed slopes considering sea level rise risk

Abd‐Elaty

Polemio

2022

Preprint

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Todays, coastal groundwater management is a challenging research topic due the relevance of these water resources and the huge suffered risks due to the global change in the coastal areas. The geometrical features of coastal aquifers play a control role on salt water intrusion (SWI). Seawater level rise (SLR), groundwater over pumping and aquifer recharge reduction promoting SWI. All these key factors are considered are considered with two different numerical approaches defining schematic management criteria. The former approach adopts the well-known Henry's problem; the latter is based on the real study case of the Gaza aquifer (Palestine). Different aquifer bed slopes, hydraulic and physical methods, including physical subsurface barriers, earth fill, check dam, abstraction, and natural or artificial recharge are considered together with SLR, recharge reduction, and over pumping. The different scenarios are compared in terms of position of saltwater intrusion interface, measured as distance from the coastline at the aquifer bottom using the numerical code SEAWAT. Useful comparing tables and considerations are defined with the purpose to guide the preliminary selections of new management solutions for reducing the effect of the global change on coastal groundwater resources around the coastal world. The land side bed slope cases show more SWI than sea side and horizontal bed slopes. Cut-off walls and check dams are effective technique to manage SWI in horizontal bed aquifers slopes more than other slopes, also the subsurface dams, earth fill and recharge of freshwater are good methods to control the SWI in land bed slopes while abstraction of brackish water and combine of freshwater recharge with brackish water abstraction are better to mitigate of SWI in sea side slopes.

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Review of Utilization Management of Groundwater at Risk of Salinization

Cited by 27 publications

References 184 publications

Hydrostratigraphic Framework and Physicochemical Status of Groundwater in the Gioia Tauro Coastal Plain (Calabria—Southern Italy)

Hydrostratigraphic Framework and Physicochemical Status of Groundwater in the Gioia Tauro Coastal Plain (Calabria—Southern Italy)

Different Ground Subsidence Contributions Revealed by Integrated Discussion of Sentinel-1 Datasets, Well Discharge, Stratigraphical and Geomorphological Data: The Case of the Gioia Tauro Coastal Plain (Southern Italy)

Environmental coastal management for groundwater resources using different aquifer bed slopes considering sea level rise risk

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