Abstract
The present research work deals with the hydrochemical nature of the groundwater samples of the Dharla and the Tista River floodplains of Kurigram district, Bangladesh. The mechanism of groundwater chemistry was studied from the Gibbs plot and it can be summarized that precipitation and rock-water interaction are the major factors that influence the groundwater chemistry. The first four factors comprise 83.243% of the total variability of the groundwater samples of the Dharla floodplain aquifer whereas in case of the groundwater of the aquifers of the Tista floodplain first five factors constitute the 81.298% of the total variability of the original data. The study shows the dominance of HCO3-1 in the anionic part of the groundwater. More than 73.68% of the groundwater samples of the aquifers of the Tista floodplain exceed the maximum permissible limit of WHO for arsenic. The groundwater samples from the Tista floodplain especially from some parts of Rajarhat have high concentrations of iron. The first factor of the Dharla floodplain is dominated by iron and HCO3-1 ions which suggests the derivation of iron in the groundwater of the study area from the chemical weathering of siderite (FeCO3).
Highlights
Of Kurigram district is nearly 3000 mm (Rahim et al 2018)
The groundwater samples from the aquifers of the Dharla floodplain, Fulbari Upazila show that the pH values are acceptable for potable and irrigation purposes and ranged 7.4 to 8.7 (Rahman et al 2013b)
The EC value of the groundwater samples of Rajarhat Upazila are varying from 99 μS/cm to 200 μS/cm (Moni et al 2019: Saha et al 2019)
Summary
Of Kurigram district is nearly 3000 mm (Rahim et al 2018). The riverine sediments contain feldspar group of minerals (Mazumder et al 1994: Saha et al 2019).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
