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Amartya Kumar Bhattacharya

Amartya Kumar Bhattacharya
MultiSpectra Consultants, Kolkata, West Bengal, India

BCE (Hons.) ( Jadavpur University ), MTech ( Civil ) ( Indian Institute of Technology, Kharagpur ), PhD ( Civil ) ( Indian Institute of Technology, Kharagpur )

About

33
Publications
15,657
Reads
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332
Citations
Citations since 2016
3 Research Items
209 Citations
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040

Publications

Publications (33)
Article
This paper studies the causes, features and management measures for floods in eastern and north-eastern India and Bangladesh. An exposition of the climatic, topographical, hydrogeological, riverine and other relevant features of the region, placed in the context of floods and flood management, is present in this paper. The ambit of the paper is nor...
Article
Full-text available
The present paper starts by presenting an overview of the Arsenic contamination in the groundwater in different parts of India. The paper goes on to present standards regarding Arsenic in drinking water and then proceeds to give a state-wise status of arsenic contamination. Adverse effects of Arsenic on the health of human beings, accumulation of A...
Article
The complexity of the hydrogeological setup in coastal areas calls for the adoption of scientific groundwater management techniques. Excessive withdrawal of groundwater in coastal zones will lead to depression of the water table, with associated hazards such as putting the well out of use, rendering abstraction uneconomic with increased lift. A sus...
Chapter
Very mild random tremors in a saturated soil are not uncommon. Mild earthquakes, nearby piling, and the passage of underground trains all lead to vibrations in a manner that cannot be exactly predicted. High pore pressures and low effective stresses in cohesionless soil can lead to soil liquefaction and complete loss of bearing capacity of the soil...
Article
In this paper, two approaches have been mentioned to calculate subsidence. One is based on the linear theory (considering elastic property of the material) and the other on the logarithmic theory. In the linear theory, coefficient of volume compressibility (denoted as m v ) indicates the nature of soil towards compression, and in the logarithmic th...
Article
Since Chezy's formula and Manning's formula are not valid for compound channel flows, a stage-discharge relationship for compound open channels is formulated in the present paper. Without dwelling on the details of the compound channel velocity distribution, an empirical equation relating the stage in a compound channel to the discharge is formulat...
Article
Local scour around bridge piers is a quite common occurance. Reduction of such scour by altering the top of the foundation and by placing piles in front of the piers is an established method now-a-days. However, alternative techniques for scour reduction need to be investigated to arrive at the conclusion regarding the most efficient scour reductio...
Article
Aquatic vegetation controls the mean and turbulent flow characteristics in rivers, streams and in coastal regions. Volume of fluid modelling approach is applied for vegetated flows idealizing vegetation as two-dimensional arrays of cylinders. The present modelling technique validated well with results obtained from flume experiments as reported in...
Article
Full-text available
In this paper two approaches have been mentioned to calculate subsidence. One is based on the linear theory (considering elastic property of the material) and the other on the logarithmic theory. In the linear theory coefficient of volume compressibility (denoted as mv) indicates the nature of soil towards compression and in the logarithmic theory...
Article
Full-text available
In this paper two approaches have been mentioned to calculate subsidence. One is based on the linear theory (considering elastic property of the material) and the other on the logarithmic theory. In the linear theory coefficient of volume compressibility (denoted as m v) indicates the nature of soil towards compression and in the logarithmic theory...
Article
The present study describes hydrogeological and piezometric view of Kolkata. Based on change in piezometric level or depth of water table from middle of the 50's decade to end of the 20th century (for 44 years) decrease of pore water pressure in the aquifers and corresponding increase of the effective stresses in the different soil strata of Kolkat...
Article
Full-text available
Artificial groundwater recharge is a process by which the groundwater reservoir is augmented at a rate exceeding the augmentation rate under natural conditions of replenishment. In some parts of India, due to over-exploitation of groundwater, decline in groundwater levels resulting in shortage of supply of water, and intrusion of saline water in co...
Article
The paper is based on experimental laboratory model study with relevant mathematical analysis followed by field investigation so as to understand the characteristics and flow pattern of saline water intrusion into natural porous medium followed by subsequent fresh water recharge.
Article
Cylindrical bridge piers are widely used and equations exist that can predict the maximum depth of local scour around such piers. Scour around piers is an undesirable phenomenon, as it requires the foundation to be placed to a greater depth resulting in increased cost, making it worthwhile to investigate scour-reducing measures. A number of scour-r...
Article
Full-text available
Offshore structures, including oil drilling platforms, jetties, quay and harbour structures, and tension leg platforms, are supported on pile foundations. Besides usual loads from super-structure, these piles are subjected to continuous lateral cyclic loading due to ocean waves. The quasi-static nature of such loading induces progressive alteration...
Article
The present paper develops a formulation for seepage flow in a soil stratum with a weakly-random hydraulic conductivity field, i.e. with a hydraulic conductivity field that is almost deterministic.
Article
An investigation of flow and velocity distribution in meandering compound channels with over bank flow is described. Equations concerning the three-dimensional variation of longitudinal, transverse. and vertical velocity in the main channel and floodplain of compound section in terms of channel parameters arc presented. The flow and velocity distri...
Article
The geological composition and the rate at which freshwater is being exploited from the aquifers greatly control the intrusion of saline water into the coastal aquifers. The phenomenon is common in the extensive coastal sedimentary deposits and delta of major rivers of the east coast of West Bengal. Extensive work on saline water intrusion and geol...
Article
The work reported herein is aimed towards conducting extensive field investigations to assess the amount of land subsidence in the city of Calcutta under the effects of existing hydrogeological conditions and over-extraction of groundwater. Based on the collected field data, the average pre-monsoon and post-monsoon depths of groundwater at various...
Article
In construction of rural roads in low lying or flood prone areas, fly ash should have to be considered as normal choice in near future. The physical and chemical properties of fly ash are reviewed first. Then the utilisation of fly ash in road works is discussed. The cost effectiveness of the utilization, especially in rigid pavement construction,...
Article
This paper reports the results of studies on the phenomenon of seepage under a sheet pile using the finite element method. The element used was A six-noded triangular finite element with Lagrangian interpolation. The flow domain was descretised into suitable elements and the velocity potential at each node was obtained from which the velocity compo...
Article
Analyses of rheological and small-angle X-ray scattering (SAXS) data measured using asphaltic samples that had been exposed to temperatures in the range 200−435 °C suggest there may be a macrochemistry involving organized groups of molecules that results in coke formation. The organized groups of asphaltic molecules form from smaller micelles natur...
Article
Full-text available
Recent weathering of Panchpatmali bauxite-bearing terrain, Koraput district, Orissa has been discussed in terms of groundwater geochemistry. pH and Eh are in favour of Fe(OH)3 development, whereas Na+:Ca2+ vs HCO3:SiO2, HCO3:SiO2 vs. ppm HCO3 and pH-pNa, 2pH-pCa, pK-pH vs. -log [H4SiO4] are all in favour of kaolinite development with a minor amount...
Article
Full-text available
The Balasore coastal groundwater basin in Orissa, India is under a serious threat as regards to groundwater quantity and quality due to seawater intrusion. The soil of Balasore district is mostly alluvial and lateritic. The aquifer is severely contaminated by seawater intrusion within a 5 to 9km wide tract along the coastline, leaving the groundwat...

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