Hydrochemistry and origin of salinity in groundwater in parts of Lower Tista Floodplain, northwest Bangladesh

Afroza, Rumy; Mazumder, Quamrul H.; Jahan, Chowdhury Sarwar; Kazi, Mehboob; Ahsan, Md. Aminul; Al-Mansur, Muhammad Abdullah

doi:10.1007/s12594-009-0124-7

Cited by 15 publications

(9 citation statements)

References 2 publications

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“…Islam et al (2017) studied the trace element contents of Rangpur district and concluded that the trace element quality of groundwater is mainly related to natural/geogenic sources followed by anthropogenic sources. Salinity with increasing depth has been reported in lower Tista floodplain which is an indicative of mixing of fresh and saline bodies due to marine transgression during Holocene period in the Bengal delta (Afroza et al 2009). The present research work shows that the quality of the groundwater is mainly controlled by geogenic processes to a lesser extent by anthropogenic activities.…”

Section: Introductionsupporting

confidence: 61%

“…Ca and Mg were determined by Atomic Absorption Spectrometer, model Shimadzu AA 7000 at 422.7 and 285.2 nm wavelength. A flame photometer was used to determine the concentration of Na and K at 589 and 765.5 nm (Afroza et al 2009). Chloride (Cl − ) was determined by argentometric method using standard AgNO 3 solution as titrate and potassium chromate as indicator (APHA 1995 ) and bicarbonate (HCO 3 − ) were determined with titration with HCl.…”

Section: Methodsmentioning

confidence: 99%

“…Sodium ions are the most important cation in stream and spring water (Feth et al 1964). High sodium concentration in water may be resulted from the mixing of freshwater with saline water bodies due to marine transgression during Holocene epoch in the Bengal Basin (Afroza et al 2009). Sources major ions in groundwater The Tista fan has developed by the sediments carried by the rivers, originating from the Himalayas, and draining through the Siwalik group of sediments (Rahman et al 2013a, b).…”

Section: Hydrochemical Facies In Water Of the Tista River Active Floomentioning

confidence: 99%

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Hydrochemical evaluation of groundwater quality of the Tista floodplain, Rangpur, Bangladesh

2019

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The Tista is a Trans-Himalayan river that flows through Sikkim and West Bengal states of India and Rangpur division of Bangladesh and finally falls into the Brahmaputra River. The presence of numerous abandoned channels with various degrees of aggradations indicates large migrations of the Tista River. The pH value of groundwater varies from 6.20 to 7.40 which indicate the slightly alkaline to acidic nature of the studied aquifers. The mean abundance of major cations is Na + > Ca +2 > Mg +2 > K + , whereas the major anions is HCO 3 − > Cl − > SO 4 −2. Among the cations, Na + is the dominant and K + is the lowest constituents, whereas HCO 3 − is most abundant and SO 4 −2 is the minor constituents in anions. The hydrochemical facies of groundwater show that sodium, sodium-magnesium, sodium-calcium, sodium-magnesium-calcium and sodium-calcium-magnesium are cation facies and chloride-bicarbonate, bicarbonate-chloride and bicarbonate are anion facies. Correlating with WHO (Guidelines for drinking-water quality, 1, World Health Organisation, Geneva, 1997) and EQS (Environmental quality standard, Department of Environment, Bangladesh, 1989) guideline values for drinking water and public health, it may be concluded that the groundwater of the study area is suitable for all drinking and domestic purposes, where only three samples exceed the maximum allowable limit of potassium. Based on total hardness, SAR, RSC, PI, SSP and MH values, it can be summarized that the groundwater of the investigated area is suitable for irrigation purpose. On the basis of Australian and UNESCO standard, the groundwater of the study area is also suitable for livestock purposes. The Rangpur area is hydrogeologically active by the processes like ion exchange and dissolution. Ca 2+ , Mg 2+ and HCO 3 − are produced by the dissolution of limestone and dolomite.

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Section: Introductionsupporting

confidence: 61%

Section: Methodsmentioning

confidence: 99%

Section: Hydrochemical Facies In Water Of the Tista River Active Floomentioning

confidence: 99%

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Hydrochemical evaluation of groundwater quality of the Tista floodplain, Rangpur, Bangladesh

2019

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“…Various salts (including nontoxic and toxic ions), minerals, heavy metals, microorganisms, pathogens, petroleum pollutants, and nutrients are among the major contaminators [17]- [22]. The salinity of groundwater may have various origins of natural and man-made causes [23]. As one of the main natural causes, the rock weathering phenomenon realizes minerals, and over time, it is washed to the groundwater causing salinity [24], [25].…”

Section: Introductionmentioning

confidence: 99%

Groundwater Salinity Susceptibility Mapping Using Classifier Ensemble and Bayesian Machine Learning Models

et al. 2020

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Risk and susceptibility mapping of groundwater salinity (GWS) are challenging tasks for groundwater quality monitoring and management. Advancement of accurate prediction systems is essential for the identification of vulnerable areas in order to raise awareness about the potential salinity susceptibility and protect the groundwater and top-soil in due time. In this study, three machine learning models of Stochastic Gradient Boosting (StoGB), Rotation Forest (RotFor), and Bayesian Generalized Linear Model (Bayesglm) are developed for building prediction models and their performance evaluated in the delineation of salinity susceptibility maps. Both natural and human effective factors (16 features) were used as predictors for groundwater salinity modeling and were randomly divided into the training (80%) and testing (20%) datasets. The models were evaluated using testing datasets after calibration using the selected features by recursive feature elimination (RFE) method. The RFE indicated that modeling with 8 features had better performance among 1 to 16 features (Accuracy = 0.87). Results of the groundwater salinity prediction highlighted that StoGB had a good performance, whereas the RotFor and Bayesglm had an excellent performance based on the Kappa values (> 0.85). Although spatial prediction of the models was different, all of the models indicated that central parts of the region have a very high susceptibility which matches with agricultural areas, lithology map, the locations with low depth to groundwater, low slope, and elevation. Additionally, areas near to the Maharlu lake and locations with a high decline in groundwater are also located in the very high susceptibility zone, which can confirm the effects of saltwater intrusion. The susceptibility maps produced in this study are of utmost importance for water security and sustainable agriculture.

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“…Groundwater is an important source of water for irrigation in Bangladesh, especially in its north‐western part, where the surface water resource is insufficient and limited during the dry months. Salinity in groundwater was first encountered in part of north‐west Bangladesh during the 1970s, when the Bangladesh Agricultural Development Corporation (BADC) tried to construct deep tubewells (DTWs) in the Barind Tract (Afroza et al, ; Alam et al, ). Groundwater in south‐western Bangladesh is affected by salinity, creating a shortage of safe drinking water and limited scope for traditional irrigation.…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Variation of Soil and Water Salinity in the South‐Western and South‐Central Coastal Region of Bangladesh

Rahman

Sarker

Mia

2017

Irrigation and Drainage

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Salinity intrusion is one of the major water‐related problems in the coastal region of Bangladesh. The intention of this study was to discuss the spatial distribution of soil and water salinity with their severity levels using geospatial techniques. The spatial analysis shows about 222 300 ha of new land being affected by various degrees of soil salinity during the last four decades. The analysis revealed that the spatial extent of salinity has been following an increasing trend and the movement of soil salinity has moved north from the coast. An increasing trend of salinity concentration in the rivers has already been found in the Lower Meghna River, Alaipur Khal (creek) of Daratona River, Gorai Madhumati, Rupsa Passur River and Bishkhali River in different districts of coastal Bangladesh. The groundwater is contaminated with a high level of salinity, which affects sources of drinking water, agriculture and the irrigation sector. Increased soil and water salinity levels cause an unfavourable environmental and hydrological situation that restricts usual crop production throughout the year. This research will assist decision makers and planners in taking proper initiatives for developing integrated land and water resources management plans for the coastal regions, which have similar environmental settings along the Bay of Bengal. Copyright © 2017 John Wiley & Sons, Ltd.

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Hydrochemistry and origin of salinity in groundwater in parts of Lower Tista Floodplain, northwest Bangladesh

Cited by 15 publications

References 2 publications

Hydrochemical evaluation of groundwater quality of the Tista floodplain, Rangpur, Bangladesh

Hydrochemical evaluation of groundwater quality of the Tista floodplain, Rangpur, Bangladesh

Groundwater Salinity Susceptibility Mapping Using Classifier Ensemble and Bayesian Machine Learning Models

Spatial and Temporal Variation of Soil and Water Salinity in the South‐Western and South‐Central Coastal Region of Bangladesh

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