Browsing by Author "Tiwari, S.K."

Now showing 1 - 6 of 6
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    Groundwater quality assessment using water quality index (WQI) under GIS framework
    (Springer Science and Business Media Deutschland GmbH, 2021) Ram, Arjun; Tiwari, S.K.; Pandey, H.K.; Chaurasia, Abhishek Kumar; Singh, Supriya; Singh, Y.V.
    Groundwater is an important source for drinking water supply in hard rock terrain of Bundelkhand massif particularly in District Mahoba, Uttar Pradesh, India. An attempt has been made in this work to understand the suitability of groundwater for human consumption. The parameters like pH, electrical conductivity, total dissolved solids, alkalinity, total hardness, calcium, magnesium, sodium, potassium, bicarbonate, sulfate, chloride, fluoride, nitrate, copper, manganese, silver, zinc, iron and nickel were analysed to estimate the groundwater quality. The water quality index (WQI) has been applied to categorize the water quality viz: excellent, good, poor, etc. which is quite useful to infer the quality of water to the people and policy makers in the concerned area. The WQI in the study area ranges from 4.75 to 115.93. The overall WQI in the study area indicates that the groundwater is safe and potable except few localized pockets in Charkhari and Jaitpur Blocks. The Hill-Piper Trilinear diagram reveals that the groundwater of the study area falls under Na+-Cl?, mixed Ca2+-Mg2+-Cl? and Ca2+-HCO3- types. The granite-gneiss contains orthoclase feldspar and biotite minerals which after weathering yields bicarbonate and chloride rich groundwater. The correlation matrix has been created and analysed to observe their significant impetus on the assessment of groundwater quality. The current study suggests that the groundwater of the area under deteriorated water quality needs treatment before consumption and also to be protected from the perils of geogenic/anthropogenic contamination. � 2021, The Author(s).
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    Groundwater Stress Analysis using GIS in Parts of Varanasi District, Uttar Pradesh, India
    (Springer, 2022) Chaurasia, Abhishek Kumar; Pandey, H.K.; Tiwari, S.K.; Pandey, Prashant; Ram, Arjun
    The observation based on field as well as secondary data collected from the various observation wells in the district of Varanasi during pre- and post-monsoon periods which show continuous decline in the groundwater level during the year 2009�15 except year 2012. After the analysis of hydrogeological and rainfall data, the groundwater behaviour of the area has been accessed. The correlation among rainfall, sub-surface lithology and groundwater level have been carried out to access the interrelationship of these factors. Thickness of clay and fine sand are governing factors for groundwater level under phreatic condition in the study area. The groundwater regime has strong relationship with rainfall and sub-surface soil condition. The groundwater is under stress condition particularly in the northern part of the study area due to lower rainfall in comparison to excessive groundwater withdrawal and significant thickness of clay layer below the ground surface. � 2021, The National Academy of Sciences, India.
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    Groundwater vulnerability assessment using water quality index (WQI) under geographic information system (GIS) framework in parts of Uttar Pradesh, India
    (Springer Science and Business Media Deutschland GmbH, 2021) Chaurasia, Abhishek Kumar; Pandey, H.K.; Tiwari, S.K.; Pandey, Prashant; Ram, Arjun
    Groundwater resources are affected in principle by three major activities. First is excessive use of fertilizers and pesticides in agricultural areas. The second is untreated/partially treated wastewater to the soil/water and the third one is excessive pumping and improper management of aquifers. Due to large-scale urban growth which has triggered domestic effluents and on the other hand industrial development activities has resulted in the generation of a copious volume of industrial effluents directly and indirectly contaminate the groundwater. In a drinking water quality assessment, the decision-making based on water quality data is a crucial issue because several parameters compromise its quality. There has been considerable advancement in the field of water quality assessment particularly based on the principle of the water quality index (WQI) using modified concepts. The study area which includes part of Varanasi and Sant Ravidas Nagar districts are centers for urban growth along with industrial setup in Uttar Pradesh, India. Water quality index (WQI) is an index reflecting the composite influence of different water quality parameters which is considered for calculation. 50 numbers of groundwater samples were collected from various locations in the study area as per the standard protocol prescribed by the American Public Health Association (APHA). Twenty-two water quality parameters have been considered for the calculation of water quality index viz. pH, electrical conductivity (EC), total hardness (TH), total dissolved solids (TDS), alkalinity, sodium (Na+), potassium (K+), calcium (Ca2+), magnesium (Mg2+), nitrates (NO3?), bicarbonate (HCO3?), chlorides (Cl?), sulphates (SO4?), fluorides (F?), chromium (Cr), zinc (Zn), copper (Cu), manganese (Mn), iron (Fe), nickel (Ni), lead (Pb) and cadmium (Cd). The Bureau of Indian Standard has been considered to assess the suitability of groundwater for drinking purposes and the calculation of the water quality index (WQI). Correlation study among various physicochemical properties also reflects certain significant negative relationships. The current study shows that 50% of the collected water samples are non-suitable for the drinking water category and the rest is falling under the good, moderate, poor, very poor as per the Water Quality Index (WQI) classification. The present study is quite helpful for the proper planning and management of available water resources for drinking purposes. � 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
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    Identification of Potential Recharge Zones in Drought Prone Area of Bundelkhand Region, India, Using SCS-CN and MIF Technique Under GIS-frame work
    (Springer Science and Business Media B.V., 2021) Pandey, Prashant; Tiwari, S.K.; Pandey, H.K.; Chaurasia, Abhishek Kumar; Singh, Sachchidanand
    Jaspura watershed a part of Yamuna basin is situated in drought prone area lying in the Banda district of Bundelkhand region, Uttar Pradesh, India. The drastic decline of groundwater level and consistently drying up of the phreatic aquifer has led to the acute shortage of groundwater in the study area. The situation is further aggravated due to base flow in the areas adjoining the major order streams. To mitigate such problem in study area, MIF technique, combined with RS and GIS, has been effectively used to delineate the potential recharge zone using seven thematic layers, viz., LULC, soil, slope, drainage density (Dd), geomorphology, depth to water level map of post-monsoon, and groundwater fluctuation map. Relative rates and weight of each influencing factor have been calculated on the basis of major and minor effect of these thematic layers. Based on their influence on groundwater recharge capacity using seven thematic layers under potential zone, five classes under artificial recharge have been identified, viz., very high (96.4 km2), high (157.4 km2), moderate (146.1 km2), low (72.9 km2), and very low (34.2km2). The runoff in 15 micro-watersheds has been estimated using SCS-CN approach. Integration of runoff and potential recharge zone has yielded the suitable sites and type of groundwater recharge structure. On the basis of its percolation tank (PT), check dam (CD) and sub-surface dam (SD) have been identified as feasible and suitable groundwater recharge structure. � 2021, The Author(s), under exclusive licence to Springer Nature Singapore Pte Ltd.
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    Physico-Mechanical Characteristics of Vindhyan Sandstone, India
    (Springer, 2022) Chaudhary, V.; Srivastav, A.; Pandey, V.H.R.; Kainthola, Ashutosh; Tiwari, S.K.; Dwivedi, S.B.; Singh, T.N.
    Quick and reliable estimation of intact rock strength parameters is vital for the excavation and stability measurement. The present research details the assessment of a few physico-mechanical parameters of sandstone rocks from Eastern India, and their statistical correlation and swift prediction. The dataset consists of 150 experimentally evaluated values for dry density, porosity, uniaxial compressive strength, tensile strength and Young�s modulus. Afterwards, the data were analyzed in the statistical environment �R� for correlation and distribution. For the ease of usage and implementation, density and porosity have been used as explanatory variables for the prediction of strength attributes. Initially, univariate linear regression models were devised, which yielded a coefficient of determination ranging between, 0.5 to 0.73. However, the r2 increased, in a range between 0.69 and 0.74, when multivariate analysis using the same independent variables was performed. In the present work, investigations and analysis have been done to predict the uniaxial compressive strength, tensile strength and Young�s modulus with dry density and porosity. Moreover, the statistical significance of the study has been discussed and compared with previous work. The present research can be used as a means to quickly and economically estimate strength parameters in the absence of a sophisticated testing setup. � 2021, The Institution of Engineers (India).
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    Pseudorapidity density, transverse momentum spectra, and elliptic flow studies in Xe-Xe collision systems at sNN =5.44 TeV using the HYDJET++ model
    (American Physical Society, 2021) Pandey, Saraswati; Tiwari, S.K.; Singh, B.K.
    In this paper, we present a systematic study of Xe-Xe collisions at 5.44-TeV center-of-mass energy. We employ the Monte Carlo (hydrodynamics plus jets) HYDJET++ model to calculate the pseudorapidity distribution, transverse momentum (pT) spectra and the elliptic flow (v2) of charged hadrons with different parameters in two geometrical configurations: body-body and tip-tip type of Xe-Xe collisions. The kinematic ranges 0