Browsing by Author "Bhattacharyya, Debdeep"

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    Deciphering the impact of anthropogenic coastal infrastructure on shoreline dynamicity along Gopalpur coast of Odisha (India): An integrated assessment with geospatial and field-based approaches
    (Elsevier B.V., 2022-10-22T00:00:00) Mishra, Manoranjan; Kar, Prabin K.; Chand, Pritam; Mohanty, Pratap K.; Acharyya, Tamoghna; Santos, Celso Augusto Guimar�es; Gon�alves, Rodrigo Mikosz; Silva, Richarde Marques da; Bhattacharyya, Debdeep; Beja, Santosh Kumar; Behera, Balaji
    Odisha's coastline supports various development activities that are critical to the state and national economy, such as oil and gas, ports and harbors, power plants, fishing, tourism, and mining that continues to not only detriment the coastal ecology but also affect the overall shoreline morphodynamics. The morphological changes are complicated processes involving both natural and human-induced drivers, but it is critical to understand how recent development activities further impact beach morphodynamics and shoreline dynamicity. The study analyzes the overall shoreline morphodynamics in response to the recent development of port and other related infrastructure for annual and decadal scale using two-dimensional (2-D) shoreline changes along with detailed 3-D beach profile volumetric changes for different studied zones along the Gopalpur coast. The results reveal that nearly all studied zones of the Gopalpur shoreline, Zone-4 (EPR = ?05.64 m a?1 and LRR = ?04.25 m a?1), Zone-3 (EPR = ?04.51 m a?1 and LRR = ?07.01 m a?1) and Zone-1 (EPR = ?2.85 m a?1 and LRR = ?01.46 m a?1), experienced erosion between 2010 and 2020 except Zone-2 (EPR = 24.31 m a?1 and LRR = 25.96 m a?1), which showed overall sign of deposition. The interannual shoreline analysis depicted that Zone-1 (tourist beach area) remained almost stable, Zone-2 (south of the breakwater of Gopalpur Port) showed accretion trends, Zone-4 (north side of the port) dominantly showed an erosion pattern, whereas Zone-3 (port area) showed a high level of uncertainty in the context of erosional or deposition trends. Calculated volumetric loss along the surveyed 3-D beach profiles supports these 2-D changes for all the studied zones. The results showed substantial changes in coastal morphodynamics in different studied zones of the Gopalpur region and severe erosion along its northern segment of the constructed coastal infrastructure. These findings can potentially promote effective coastal zone management and prevent further deterioration along the Gopalpur coast in future. � 2022 Elsevier B.V.
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    Mapping main risk areas of lightning fatalities between 2000 and 2020 over Odisha state (India): A diagnostic approach to reduce lightning fatalities using statistical and spatiotemporal analyses
    (Elsevier Ltd, 2022-07-04T00:00:00) Mishra, Manoranjan; Acharyya, Tamoghna; Santos, Celso Augusto Guimar�es; Silva, Richarde Marques da; Chand, Pritam; Bhattacharyya, Debdeep; Srivastava, Sanjay; Singh, Omvir
    This study analyzes the spatiotemporal variation of lightning flashes and lightning strike deaths from 2001 to 2020 among all 30 districts of Odisha State, India. Lightning flash data for the study area were acquired from Lightning Imaging Sensor (LIS) installed aboard the Tropical Rainfall Measuring Mission (TRMM) for the 2001�2014 period and from International Space Station for the 2017�2020 period. Deaths by lightning flashes were acquired from the annual report of natural calamities for the 2001�2020 period from the Revenue and Disaster Management Department, Government of Odisha. In this study, the spatial pattern of lightning flashes based on LIS data and resultant deaths were assessed using spatiotemporal statistical analysis, including the interpolation method and Sen's slope estimator. The geospatial heat maps of lightning strikes and deaths highlight the spatiotemporal heterogeneity of lightning strikes and induced deaths in Odisha State. Furthermore, statistical analyses demonstrate an apparent increase in lightning strikes in the state as a whole, with particular attention to the Mayurbhanj, Sundargarh, and Keonjhar districts, which had the highest incidence of lightning. Odisha State was hit by more than 10,000 lightning strikes every year between 2000 and 2020, excluding 2001, 2017, and 2018. The results show a moderate correlation (R = 0.61) between lightning strikes and lightning deaths in Odisha State during the analyzed period, which further needs to be investigated with respect to the seasonality of lightning, the locational vulnerability, and temporal risk. � 2022 Elsevier Ltd