Groundwater hydrochemistry at the Mediterranean coastal plains — The case of Silifke, Turkey

Seçkin, Galip; Yılmaz, Tuncay; Sarı, Bülent; Ersü, Çağatayhan B.

doi:10.1016/j.desal.2009.11.012

Cited by 18 publications

(1 citation statement)

References 5 publications

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“…All over the world, the evaluation of groundwater quality is one of the most practiced methods to understand the quality of drinking water in an area. There are several studies that can be found in literature for the same (Singh et al 2005;Subramani et al 2005;Kumar et al 2007;Papaioannoua et al, 2007;Nagarajan et al 2010;Seckin et al, 2010;Amoako et al 2011;Vasanthavigar et al 2012;Bouderbala 2015;Li et al 2016;Singh et al 2017). However, the assessment of the parameters included in each study is dependent on the environmental conditions, the expected contamination sources, determined by the preliminary survey, or by referral to earlier studies and of course the availability of analytical facilities within the economical scope of the study.…”

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confidence: 99%

Nutrient chemistry and seasonal variation in the groundwater quality of a Riverine Island on the west coast of Kerala, India

Kumar

Kokkat

Kurian

et al. 2020

Sustain. Water Resour. Manag.

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This study attempted to evaluate the groundwater quality, with a special emphasis on nutrients, of a riverine coastal island near Kodungallur, Kerala. Water quality parameters were analyzed in the collected samples over pre- and post-monsoon seasons. A considerable variation in groundwater chemistry was observed in the two periods. During pre-monsoon season, many wells were contaminated with TDS, Cl, Fe, Ca and Mg in certain locations. Whereas, post-monsoon water was relatively fresh, indicating the dilution process as well as aquifer recharge by the monsoon rain and consequent regression of saline water. A higher concentration of Fe was observed in the pre-monsoon season (41%) than in the post-monsoon season (24%). Nitrate and phosphates were analyzed to assess the nutrients and the observed concentration was below their corresponding permissible limits. Results show that overexploitation of the aquifer as well as the decreased flow of the River Periyar during the pre-monsoon period increased the threat from seawater intrusion and groundwater contamination. An interesting groundwater recharge mechanism locally known as backwashing—the diversion of rainwater from rooftops to dug wells—is being practiced in the study area and has been found to be effective in raising water levels and improving water quality.

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Section: Introductionmentioning

confidence: 99%

Nutrient chemistry and seasonal variation in the groundwater quality of a Riverine Island on the west coast of Kerala, India

Kumar

Kokkat

Kurian

et al. 2020

Sustain. Water Resour. Manag.

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Dissolved Nutrient Distributions in Groundwater in the Mediterranean Coastal Plains – the Case of Silifke, Turkey

Seçkin

Yılmaz

Sarı

et al. 2010

CLEAN Soil Air Water

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Total carbon, nitrogen, and phosphate parameters were studied for the first time in the groundwater in the Silifke coastal plain, which is a RAMSAR site in Turkey. Seasonal variations of these parameters in the plain were examined based on groundwater data collected from 21 wells during the winter, spring, summer, and fall seasons. Total dissolved organic carbon (DOC), inorganic carbon (DIC), inorganic phosphate (DIP), inorganic nitrogen (DIN), and total alkalinity (TAlk) average values in the groundwater were low in all seasons (<2.2 mg/L for DOC; <54 mg/L for DIC; <0.06 mg/L for DIP; <1.5 mg/L for DIN; <232 mg/L for TAlk). The results showed a strong relationship between DIC and HCO À 3 as expected. The results indicate that the content of these parameters in the groundwater of Silifke coastal plain pose no or little risk at present. However, computed Langelier Saturation Index (LSI) values indicated that the groundwater has a tendency to form scale and CaCO 3 precipitation may occur. IntroductionIn natural carbon and nutrient cycles, the role of coastal environment has been an important focal issue in the discussion about global environmental change [1]. Cai et al. [2] pointed out that coastal wetlands and salt marshes had been ignored in global carbon cycle research since inorganic carbon inputs from underground aquifers to the coastal zone may be a significant source of carbon to the coastal sea and atmosphere while Valiela and Teal [3], Johannes [4], and Moore [5] have highlighted the importance of carbon and nutrient transport via groundwater in some systems.The general characteristics of groundwater formed with the aid of atmospheric precipitation might show differences due to evapotranspiration, runoff, and seasonal changes of hydrological properties, size, and thickness of the vadose zone of the aquifer [6,7]. The change in the groundwater characteristics can be defined and evaluated by the geochemical evolution of dissolved organic carbon (DOC) as well as the dissolved nutrient balance. DOC is closely related to dissolved inorganic carbon (DIC), which is the sum of gaseous CO 2 , bicarbonate, and carbonate, and both are involved in important redox reactions taking place in hydro-geochemical processes [8,9]. DOC and particulate organic carbon (POC) comprises total organic carbon (TOC) in any given aqueous environment. DOC generally amounts to $90% of TOC in surface waters, whereas the DOC content in groundwater is generally below 1-2 mg C/L [7,10]. On the other hand, the nutrient content of any water resource is highly characterized by dissolved inorganic phosphate (DIP), inorganic nitrogen (DIN), and total alkalinity (TAlk) [11].Prior to this study, no records existed on the spatial or annual variability of total DOC, DIC, DIP, DIN, and TAlk of groundwater in Silifke plain, which is a RAMSAR site in Turkey. The purpose of this study was not only to investigate the present implications of the findings of the analytical results obtained but also to establish background data for much needed future monito...

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Preliminary assessment of groundwater hydrogeochemistry within Gilan, a northern province of Iran

Nematollahi

Clark²,

Ebrahimi

et al. 2018

Environ Monit Assess

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In four basins of Gilan province, groundwater samples were collected from 127 piezometric wells to investigate the hydrogeochemistry of groundwater, and additionally its suitability for drinking and irrigation purposes. The average concentrations of major cations and anions follow the order of Ca > Na > Mg > K and [Formula: see text], respectively. Using Piper diagram delineation, CaMgHCO was determined as the main hydrogeochemical facies of groundwater. According to Piper diagrams, Gibbs plots, and ionic ratios, silicate weathering and ion exchange are the major processes regulating the groundwater hydrochemistry. Furthermore, saturation indices (SIs) revealed that carbonate precipitation also plays an important role in aquifers. Among the processes, weathering of silicate minerals seems to be the dominant process. Comparing the analyzed major ions and physicochemical parameters with the WHO guideline values indicates that the potability of most groundwater samples is generally acceptable. Electrical conductivity (EC) and total dissolved solid (TDS) measurements along with sodium percentage (SP), sodium adsorption ratio (SAR), Kelley's index (KI), and residual sodium carbonate (RSC) calculations suggest that groundwater in many areas is suitable for irrigation use. Nonetheless, total hardness (TH) values ranging as high as 650.0 mg/l reveal many groundwater samples to be classified as hard and very hard, indicating a requirement for long-term monitoring and further evaluation. The present study shows that the groundwater quality in Lahijan, Astaneh, and to a lesser extent Fouman drainage basins is lower than in Talesh. Therefore, intense monitoring programs towards enhanced water management practices are recommended before poorer quality groundwater is further utilized.

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Groundwater hydrochemistry at the Mediterranean coastal plains — The case of Silifke, Turkey

Cited by 18 publications

References 5 publications

Nutrient chemistry and seasonal variation in the groundwater quality of a Riverine Island on the west coast of Kerala, India

Nutrient chemistry and seasonal variation in the groundwater quality of a Riverine Island on the west coast of Kerala, India

Dissolved Nutrient Distributions in Groundwater in the Mediterranean Coastal Plains – the Case of Silifke, Turkey

Preliminary assessment of groundwater hydrogeochemistry within Gilan, a northern province of Iran

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