Sangita deyBanaras Hindu University | BHU · Institute of Environment and Sustainable Development
Sangita dey
Doctor of Philosophy
About
10
Publications
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Introduction
Groundwater chemistry assessment and modelling
Skills and Expertise
Publications
Publications (10)
This study focuses on determining significant controlling factors of chemical consequences, inverse geochemical modeling, water quality, and human health risk in the Varuna River basin of India. The study interprets that according to pH, total dissolved solids, and total hardness, the maximum number of groundwater samples are alkaline, fresh, and h...
An approach has been made in this study to delineate the groundwater potential zones of the Varuna river basin, Uttar Pradesh, India, using the analytical hierarchy process (AHP) and multi-influence factor (MIF) techniques. The present groundwater estimation exhibits an increase in the draft (10%) due to expansion in population, agricultural extent...
Inevitable issues concerning the sustainability of groundwater resources are crucial under the present climatic situation. Therefore, the prevision of groundwater environments may able to reinforce the management system. In this respect present study considered a new method to predict long-term groundwater level framework as an alternative option o...
Uttar Pradesh is well known for its rice–wheat cropping system whenever it comes to agricultural sector. Being one of the highest producers of wheat and the second highest in terms of rice production, the state needs to be cautious about the usage of both of the quantity and quality of water as irrigation. The adversity of variability in climate ha...
Groundwater systems are largely influenced by rainfall variability which is considered the principal source of recharge. The present study explores the relation between the long-term rainfall (1992–2014) and the corresponding water table variation over the Varanasi district. The temporal trends of both the water table and long-term rainfall were an...
Significant amounts of fluoride are found in the abstracted groundwater of the southern part of the Upper Panda River basin, Sonbhadra district, Uttar Pradesh, India. Hence groundwater with high fluoride and water mixture patterns were studied in Panda River basin through hydrochemical interpretation from 65 groundwater chemical data information fr...
The shortage of water resources of good quality is becoming an important issue in hard rock and semi-arid zones and rapid declining of groundwater supplies are common (Raju and Reddy, 2007). Groundwater is the primary source of water for domestic, agricultural and industrial uses in many countries, and its contamination has been recognised as one o...
Around 9000 inhabitants in the Panda River basin, Sonbhadhra District, Uttar Pradesh, India, are vulnerable to a “silent” dental and skeletal fluorosis from groundwater consumption. The fluoride source and seasonal groundwater quality variation were studied by collecting 65 groundwater samples in the Upper Panda River basin. Major rock types are ph...
The lower Varuna River basin in Varanasi district situated in the central Ganga plain is a highly productive agricultural
area, and is also one of the fast growing urban areas in India. The agricultural and urbanization activities have a lot of
impact on the groundwater quality of the study area. The river basin is underlain by Quaternary alluvial...
Fluoride (F¯) concentration over and above the permissible limits (1.5 mg/l) in drinking water leads to human health hazards, such as dental and skeletal fluorosis affecting millions of people in many parts of India. Preliminary investigations indicate that severe health disorders have been identified in parts of the Kachnarwa region, which is in t...
Questions
Questions (3)
Recently, I have been working on IWQI calculation. I have used the equation suggested by Meireles et al._2010. But I am not sure how to calculate the Xamp values. I tried to calculate as per my understanding by using some existing data taken from published papers to learn the procedure. Still, I did not achieve the same answer mentioned in the published paper. So, can anyone please point out my mistakes? I am mentioning a part of values below
EC SAR Na
Xij 968 3.96 4.57
qimax 85 85 85
qiamp 72.5 72.5 72.5
Xinf 750 3 3
Xamp 1087 3.72 3.64
qi 70.46 66.29 53.73
qiXwi 14.87 13.99 11.34
qiXwi
(published 16.40 15.31 14.68
answers)
First of all, I have classified the data as per the limiting values. then select the maximum value of qimax followed by the qiamp calculation by considering the formula amplitude = (min+max)/2. where for the second class it is = (85+60)/2 = 72.5. Xinf is the lower limit of the class. For calculating the Xamp I have taken the highest and lowest values of physicochemical analysis. As per the EC values, it comes under class II (60- 85). The highest value is 1206, and the lowest value is 968. So xamp = (1206+968)/2= 1087. but the answer did not match.
Can anyone focus on the steps used in the calculation of IWQI? How to decide the values of the parameters of the equations.
Thank you and waiting for your answer.
I am using Aqua Chem 4.2 for hydrochemical analysis. I have done successfully the plotting section but i am not able to open phreeqc (basic) or (advance). First of all, I have selected File>Preferences>PHREEQC. Then selected Thermodynamic database and phreeqc Executable. After that I try to open phreeqc (basic) but it is not responding and when clicking the phreeqc(advance) form the Tools>Modeling, it is showing the error: "C:/program files (86x)/Aqua Chem/ PHRin.temp was not found". I have attached the snapshot of error.
Please help me to solve the problem.
I have generated groundwater potential zones using AHP technique. Now I want to validate my result with existing yield data (77 wells). How can I know the sensitivity and specificity of my study?
