Faculty Publications - Book Chapters

Permanent URI for this collectionhttps://ir.nbu.ac.in/handle/123456789/4926

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Author: search.filters.author.Saha, SnehasishHas files: Yes

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    ItemOpen Access
    Water Quality Assessment of the Mahananda River in Sub-Himalayan Foothills Regions of India
    (Bluerose Publishers, 2022) Malo, Sujoy Kumar; Saha, Snehasish; Saha, Snehasish; Chakrabarty, Kunal; Das, Mantu
    The Physico-chemical characteristics were supported by a recent study determining the quality of water in the Mahananda River. While assessing water quality, pH, dissolved oxygen (DO), temperature, biological oxygen demand (BOD), nitrate, fecal coliform, total coliform, and conductivity were taken into account. Samples were taken from three distinct locations along the river, and temporal data was collected from 2009 to 2016 to be analyzed using various statistical approaches. The majority of the parameters in our analysis surpassed the highest allowed standard value set by the CPCB. Especially the people of Siliguri are mostly captivated by river Mahananda to meet their needs for drinking and numerous household uses regularly, but the river's state is currently very poor due to several water pollution problems. The Physico-chemical properties of the Mahananda River are Miserable due to unpurified sewage, garbage, and rapid urbanization of the Siliguri municipal area. This glance gives a general overview of the present problems with water in the river adjacent area. This study may be the simplest way to communicate with the people and the policymakers.
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    ItemOpen Access
    Delineation of Groundwater Potential Zones Using Analytic Hierarchy Process (AHP) Technique in Balason River Basin of West Bengal, India
    (BlueRose Publishers, 2022) Rahaman, Saidur; Das, Mantu; Saha, Snehasish; Saha, Snehasish; Chakrabarty, Kunal; Das, Mantu
    Groundwater potential remains an essential topic in the Balason river basin of West Bengal, India. Groundwater potentials can be predicted using an integrated analytical hierarchy process (AHP) approach using a GIS and remote sensing. The goal of this study is to create a groundwater potential zone (GWPZ) map for the Balason River Basin that is reliable and based on scientific evidence. In this situation, the AHP of the MCDA method is used to investigate the potential prospect zones for groundwater resources with significant parameters. To create distinctive thematic layers, USGS satellite data, 30 metre spatial resolution of Landsat 8 images and SRTM-DEM data were used. Eight primary influencing factors were selected: geomorphology, lineament density, slope, slope aspect, lithology, soil types, and land use land cover (LULC), and drainage density. The AHP method produces a GWPZ map utilizing significance scale, pair-wise comparison, signifies consistency ratio, normalized, and weighted overlay technique. The GWPZ map comprises "Very poor," "Poor," "Moderate," "Good," and "Very Good" potential zones with 9.91, 38.45, 25.49, 14.61, and 11.83% share of the overall area respectively. Finally, using receiver operating characteristic (ROC) curve analysis, the generated GWPZ map is approved. Furthermore, the best strategies will be to bring up a good level of groundwater recharge zone through water storage and sustainable land use planning. As a result, groundwater availability should be viewed as a measure of progress in the economic sector and the development of a sustainable human civilization.
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    ItemOpen Access
    Analyzing the Complex Interaction of Active Tectonics and Basin Scale Geomorphology: A Case Study of Chel River Basin Using GIS Tool
    (BlueRose Publishers, 2022) Ghosh, Debarshi; Saha, Snehasish; Saha, Snehasish; Chakrabarty, Kunal; Das, Mantu
    The channel of Chel expressing a highly dynamic behavior in its entire course especially at the mountain out let by means of sediment-water supply variation. The existing water regime is the expression of highly variable nature of rainfall and structurally controlled river channel. Fluvial dynamics of Chel basin is highly abrupt in nature as the seasonal alterations disclose no steady trend of ongoing channel processes. Dependent on tectonic activity, hydrological regime, and sediment load of certain streams, the characteristics of the mountain front of the Darjeeling sub-Himalaya display a considerable variability. The surface is made up of a variety of alluvial fans from Quaternary sand deposition. The longitudinal profile following the channel thalweg shows distinct fluctuations of height due to such epierogenetic movements and interruption of normal cycle of erosion. The value of Hypsometric integral (48.56) indicates that the fluvial system is approaching to late youthful stage. The reason of tectonic instability and complex cycle of epierogenetic upliftments have been controlling the process of dynamic rejuvenation in this basin.
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    The Study of Groundwater Level Fluctuations of Damodar River Basin, West Bengal, India
    (BlueRose Publishers, 2022) Poddar, Debapriya; Mukhopadhay, Sarbari; Mandal, Tapash; Das, Jayanta; Saha, Snehasish; Saha, Snehasish; Chakrabarty, Kunal; Das, Mantu
    Groundwater acts as a significant provider of required water in different sectors of India, like household, agriculture, and industry. A copious amount of water and food resources are needed in Damodar River Basin for the fast expansion of the population, leading to severe strain over the water resources. The analysis of the temporal trends of groundwater level is essential for preserving groundwater for further use. Hence, the principal objective of this work is to examine the temporal trends in the Damodar River Basin in the annual, seasonal time scale from 1996 through 2017, applying the Mann-Kendall (MK) and Sen 's slope estimator tests. The outcome of these analyses represents the positive trends and also the negative trends that have occurred in the case of groundwater depth of the study area. However, decreasing trends are much weaker than increasing trends. Compared with the monsoon season, strong increasing trends have been identified in pre-monsoon, post-monsoon Kharif, and post-monsoon Rabi seasons. The southern region of the Damodar River Basin, where paddy farming requires vast amounts of water, is where the significant positive developments were concentrated. The results of this research will assist policy makers and planners in maintaining a sufficient and consistent
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    Active Death Cases and Recovery Rates of the COVID-19 Pandemic: A Comparative Study of Developed, Developing, and Least Developed Countries of the World
    (NB Publications, 2022) Rahaman, Saidur; Saha, Snehasish; Mandal, Tapash; Chakrabarty, Kunal; Mitra, Nita; Pal, Sujit
    At present, people worldwide are fighting against an unseen enemy. Outbreaks of COVID-19 are on the rise in more than 200 countries worldwide. In the world economy, human life has been dramatically affected. The developed developing, and least developed countries of the world have been affected by the extremities of COVID-19. However, the rate of COVID-19 infection is not the same in every country of the world due to some of their rules and facilities such as treatment, infrastructure, lifestyle, and awareness. The study has been done based on secondary data. Daily data on the number of recovered, active, and deaths cases were collected up to the study endpoint via the Johns Hopkins University data source (https://github.com/CSSEGISandData/COVID-19) on 24 December 2020 at 21.58 GTM and daily situation reports of World Health Organization (WHO). The data used relates to the descriptive statistics and Normalized Z-score and found relations among 15. In Developed countries, on an average, the affected COVID-19 cases were 28.73 people, say 29per thousand; median COVID-19 cases are 27.62 people, say 28 per thousand people. The average recovery rate is 65.95 % in Developed countries. Nevertheless, high confirmed cases have been found in the U.S (1,78,44,690) ...
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    ItemOpen Access
    Analysis of geomorphic indices of longitudinal river profile of Sanka River and its tributaries of Chhota Nagpur Plateau, India
    (Bluerose Publishers, 2022) Biswas, Baidurya; Saha, Snehasish; Saha, Snehasish; Chakrabarty, Kunal; Das, Mantu
    Longitudinal profile of a river provides the idea about tectonic activity and local terrain condition through which the river is flowing. It provides the information about the change in slope, natural breaks, and knick points in river course and also provides vivid idea about the cycle of development of the river. To understand minutely the local geomorphic condition, the longitudinal profiles of other major tributaries of Sanka River has been considered. By comparing the linear, logarithmic, exponential, and power regression models with distance against elevation data and geologic structure, it has been possible to understand the shape of lengthy profiles. The best fit model has been decided on the basis of derived R2 or Coefficient of Determination and the model which provides minimum sum of square of residuals and standard deviation have been considered as best fit model. It has observed that longitudinal profile majority of the streams fits with exponential model except Sanka River and Srigi Nala fits with power regression model and Dhudi Jhor fits with linear regression.