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367 results on '"Karmakar, Subhankar"'

3. Warming inhibits Increases in Vegetation Net Primary Productivity despite Greening in India

Author

Das, Ripan, Chaturvedi, Rajiv Kumar, Roy, Adrija, Karmakar, Subhankar, and Ghosh, Subimal

Subjects
Physics - Atmospheric and Oceanic Physics
Abstract

India is the second-highest contributor to the post-2000 global greening. With satellite data, here we show that this 18.51% increase in Leaf Area Index (LAI) during 2001-2019 fails to translate into increased carbon uptake due to warming constraints. Our analysis further shows 6.19% decrease in Net Primary Productivity (NPP) during 2001-2019 over the temporally consistent forests in India despite 6.75% increase in LAI. We identify hotspots of statistically significant decreasing trends in NPP over the key forested regions of Northeast India, Peninsular India, and the Western Ghats. Together, these areas contribute to 31% of the NPP of India (1274.8 TgC.year -1). These regions are the warming hotspots in India. Decreasing photosynthesis and stable respiration, above a threshold temperature, are the key reasons behind the declining NPP. Warming has already started affecting carbon uptake in Indian forests and calls for improved climate resilient forest management practices in a warming world.

Published
2022

7. Assessment of Future Land Use Land Cover Change Impacts on Hydrologic Regime of a River Basin

Author

Sadhwani, Kashish, Eldho, T. I., Karmakar, Subhankar, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Timbadiya, P. V., editor, Patel, P. L., editor, Singh, Vijay P., editor, and Sharma, Priyank J., editor

Published
2023
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10. Flood Evacuation During Pandemic: A multi-objective Framework to Handle Compound Hazard

Author

Tripathy, Shrabani S., Bhatia, Udit, Mohanty, Mohit, Karmakar, Subhankar, and Ghosh, Subimal

Subjects
Physics - Physics and Society
Abstract

The evacuation of the population from flood-affected regions is a non-structural measure to mitigate flood hazards. Shelters used for this purpose usually accommodate a large number of flood evacuees for a temporary period. Floods during pandemic result in a compound hazard. Evacuations under such situations are difficult to plan as social distancing is nearly impossible in the highly crowded shelters. This results in a multi-objective problem with conflicting objectives of maximizing the number of evacuees from flood-prone regions and minimizing the number of infections at the end of the shelter's stay. To the best of our knowledge, such a problem is yet to be explored in literature. Here we develop a simulation-optimization framework, where multiple objectives are handled with a max-min approach. The simulation model consists of an extended Susceptible Exposed Infectious Recovered Susceptible (SEIRS) model.We apply the proposed model to the flood-prone Jagatsinghpur district in the state of Odisha, India. We find that the proposed approach can provide an estimate of people required to be evacuated from individual flood-prone villages to reduce flood hazards during the pandemic. At the same time, this does not result in an uncontrolled number of new infections. The proposed approach can generalize to different regions and can provide a framework to stakeholders to manage conflicting objectives in disaster management planning and to handle compound hazards.

Published
2020

16. Flood Modelling for an Urban Indian Catchment: Challenges and Way Forward

Author

Ghosh, Mousumi, Karmakar, Subhankar, Ghosh, Subimal, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Kolathayar, Sreevalsa, editor, Mondal, Arpita, editor, and Chian, Siau Chen, editor

Published
2022
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21. Multi Criteria Decision Making for Sustainable Municipal Solid Waste Management Systems

Author

Yadav, Vinay, Karmakar, Subhankar, Patnaik, Srikanta, Series Editor, Sethi, Ishwar K., Series Editor, Li, Xiaolong, Series Editor, Chen, Li, Editorial Board Member, Horng, Jeng-Haur, Editorial Board Member, Lima, Pedro U., Editorial Board Member, Leong, Mun-Kew, Editorial Board Member, Nur, Muhammad, Editorial Board Member, Oneto, Luca, Editorial Board Member, Tan, Kay Chen, Editorial Board Member, Yadavalli, Sarma, Editorial Board Member, Yang, Yeon-Mo, Editorial Board Member, Zhang, Liangchi, Editorial Board Member, Zhong, Baojiang, Editorial Board Member, Zobaa, Ahmed, Editorial Board Member, Tajeddini, Kayhan, editor, and Jain, Vipul, editor

Published
2021
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42. Development of India’s first integrated expert urban flood forecasting system for Chennai

Author

Ghosh, Subimal, Karmakar, Subhankar, Saha, Anamitra, Mohanty, Mohit Prakash, Ali, Shees, Raju, Satya Kiran, Krishnakumar, Vrinda, Sebastian, Maneesha, Behera, Manasa Ranjan, Ashrit, R., Murty, P. L. N., Srinivas, K., Narasimhan, B., Usha, Tune, Murthy, M. V. Ramana, Thiruvengadam, P., Indu, J., Thirumalaivasan, D., George, John P., Gedam, S., Inamdar, A. B., Murty, B. S., Mujumdar, P. P., Mohapatra, M., Bhardwaj, Arun, Basu, Swati, and Nayak, Shailesh

Published
2019

47. Impact of Urban Representation on Simulation of Hurricane Rainfall

Author

Patel, Pratiman, primary, Ankur, Kumar, additional, Jamshidi, Sajad, additional, Tiwari, Alka, additional, Nadimpalli, Raghu, additional, Busireddy, N. K. R., additional, Safaee, Samira, additional, Osuri, Krishna K., additional, Karmakar, Subhankar, additional, Ghosh, Subimal, additional, Aliaga, Daniel, additional, Smith, James, additional, Marks, Frank, additional, Yang, Zong‐Liang, additional, and Niyogi, Dev, additional

Published
2023
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