Modelling the Effect of Sea Water Intrusion on Ground Water Salinity in Agricultural Areas in Israel, Portugal, Spain and Turkey

Ben‐Asher, J.; Beltrão, J.; Costa, María João; Anaç, Süer; Cuartero, J.; Soria, Toranzos

doi:10.17660/actahortic.2002.573.14

Cited by 5 publications

(3 citation statements)

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“…This problem is intensified in coastal areas due to sea-water intrusion. This results from reduced ground-water levels as the water demand exceeds the annual groundwater recharge [9]. As reported above, some of the emerging regions in risk of increasing levels of salinization of their soils are located in the Mediterranean Basin [10,11], Australia [12], Central Asia [13], and Northern Africa [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Irrigation Water Regimes on Yield of Tetragonia Tetragonioides

2019

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The main purpose of this experiment was to study the effect of several irrigation water regimes on Tetragonia tetragonioides (Pall) O. Kuntze in semi-arid regions. During the experiment period, it was measured that several irrigation regimes were affected in terms of growth, biomass production, total yield, mineral composition, and photosynthetic pigments. The experiment was conducted in the greenhouse at the University of Algarve (Portugal). The study lasted from February to April in 2010. Three irrigation treatments were based on replenishing the 0.25-m-deep pots to field capacity when the soil water level was dropped to 70% (T1, wet treatment), 50% (T2, medium treatment), and 30% (T3, dry treatment) of the available water capacity. The obtained results showed that the leaf mineral compositions of chloride and sodium, the main responsible ions for soil salinization and alkalization in arid and semi-arid regions, enhanced with the decrease in soil water content. However, the minimum amounts of chlorophyll, carotenoids, and soluble carbohydrates in the leaf content were obtained in the medium and driest treatments. On the other hand, growth differences among the several irrigation regimes were very low, and the crop yield increased in the dry treatment compared to the medium treatment; thus, the high capacity of salt-removing species suggested an advantage of its cultivation under dry conditions.

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Section: Introductionmentioning

confidence: 99%

Effect of Irrigation Water Regimes on Yield of Tetragonia Tetragonioides

2019

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“…Performed estimations indicate that of the annual production of wastewater in the world (approximately 30 million tons) 70% is consumed as an agricultural fertiliser and irrigation source (Barbera & Gurnari, 2018). Additionally, the abusive groundwater overdraft for agriculture purposes contributes to seawater intrusion (Ben-Asher et al, 2002). According to Smedema and Shiati (2002) the salinisation problem provoked by agriculture practices is more severe in arid soils, estimating that from the land dedicated to agriculture 60% corresponds to humid climatic conditions and the remaining 40% to semi-arid regions.…”

Section: Origin Of Secondary Salinisationmentioning

confidence: 99%

Treatment and Valorisation of Saline Wastewater: Principles and Practice

Río¹,

Corral²

2021

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Salinisation of freshwater occurs around the world due to anthropogenic activities associated with urban and industrial activities. These activities include groundwater abstraction for potable water supply to levels that favour seawater intrusions in coastal areas, the use of decalcifying products to prevent damage to appliances and the utilisation of salt media in industrial processes. These uses of water produce saline wastewater which is subjected to cleaning treatments that do not include salt removal. Thus, treated wastewater is reintroduced to the environment with salt levels that reduce its quality and make its further utilisation difficult. For this reason, an evaluation of the sources of wastewater with salt concentrations (e.g. NaCl) in the range from 1,300 (moderately saline) to 28,800 mg/L (very highly saline) will be provided in this section. Characteristics and compositions will be described for urban and industrial wastewater. The specific problems associated with the presence of salts will be presented and discussed.

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“…To overcome the consequences of water scarcity and climate change, the aquifers and groundwater seem to be the solution. Many of the most important water projects in these regions focus on fossil water creating a sort of "pumping race" between the countries that share common aquifers, where overexploitation of groundwater in these regions is the major cause of seawater intrusion problems [34,35,[38][39][40][41][42][43][44][45][46]. Therefore, the main challenges in coastal areas in the semi-arid region are water conservation, management and planning of the water resources.…”

Section: Overview Saltwater Intrusion Into Coastal Aquifersmentioning

confidence: 99%

Groundwater Overexploitation and Seawater Intrusion in Coastal Areas of Arid and Semi-Arid Regions

Alfarrah

Walraevens

2018

Water

252

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Abstract:The exploitation of groundwater resources is of high importance and has become very crucial in the last decades, especially in coastal areas of arid and semi-arid regions. The coastal aquifers in these regions are particularly at risk due to intrusion of salty marine water. One example is the case of Tripoli city at the Mediterranean coast of Jifarah Plain, North West Libya. Libya has experienced progressive seawater intrusion in the coastal aquifers since the 1930s because of its ever increasing water demand from underground water resources. Tripoli city is a typical area where the contamination of the aquifer in the form of saltwater intrusion is very developed. Sixty-four groundwater samples were collected from the study area and analyzed for certain parameters that indicate salinization and pollution of the aquifer. The results demonstrate high values of the parameters Electrical Conductivity, Na + , K + , Mg 2+ , Cl − and SO 4 2− , which can be attributed to seawater intrusion, where Cl − is the major pollutant of the aquifer. The water types according to the Stuyfzand groundwater classification are mostly CaCl, NaCl and Ca/MgMix. These water types indicate that groundwater chemistry is changed by cation exchange reactions during the mixing process between freshwater and seawater. The intensive extraction of groundwater from the aquifer reduces freshwater outflow to the sea, creates drawdown cones and lowering of the water table to as much as 25 m below mean sea level. Irrigation with nitrogen fertilizers and domestic sewage and movement of contaminants in areas of high hydraulic gradients within the drawdown cones probably are responsible for the high NO 3 − concentration in the region.

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Modelling the Effect of Sea Water Intrusion on Ground Water Salinity in Agricultural Areas in Israel, Portugal, Spain and Turkey

Cited by 5 publications

References 0 publications

Effect of Irrigation Water Regimes on Yield of Tetragonia Tetragonioides

Effect of Irrigation Water Regimes on Yield of Tetragonia Tetragonioides

Treatment and Valorisation of Saline Wastewater: Principles and Practice

Groundwater Overexploitation and Seawater Intrusion in Coastal Areas of Arid and Semi-Arid Regions

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