Browsing by Author "Diva Bhatt"

Now showing 1 - 6 of 6

Disaster Risk Reduction Including Climate Change Adaptation Over South Asia: Challenges and Ways Forward
(Beijing Normal University Press, 2019) Rajesh K. Mall; Ravindra K. Srivastava; Tirthankar Banerjee; Om Prakash Mishra; Diva Bhatt; Geetika Sonkar
South Asia is vulnerable to a variety of hydrometeorological hazards, which are often cross-boundary in nature. Climate change is expected to influence many of these hazards. Thus, climate-related risks over South Asia make disaster risk reduction (DRR) and climate change adaptation (CCA) key policy goals. Recently there is an increasing consensus that DRR including CCA should be embedded in development planning. Disaster risk reduction including CCA has progressively gained importance in global governance. Across South Asia, however, such integration is only in a preliminary stage. This review was to assess the existing status and scope of DRR including CCA in development projects across South Asia, so that an effective and achievable deliberation may be made to regional policymakers. A total of 371 projects relevant to CCA and DRR were reviewed. The project inventory was diverse in nature with respect to location, scale, sectoral focus, and strategic importance. Bangladesh, India, and Bhutan were observed to be proactive in implementing DRR- and CCA-related projects. Meta-analysis of the project inventory suggests an urgent need for an individual and collaborative convergence of processes for DRR and CCA through policies, plans, strategies, and programs. © 2018, The Author(s).
Impact of Climate Variability on the Rice Yield in Uttar Pradesh: an Agro-Climatic Zone Based Study
(Springer Basel, 2019) Diva Bhatt; Geetika Sonkar; R.K. Mall
In the backdrop of the established fact that the climate and agricultural produce foster a close-knit relation, the present study explores the impacts of climate variability on the rice yields across diverse agro-climatic zones of Uttar Pradesh, India. The time-series non-parametric Mann-Kendall trend test was applied to study long term (both annual and seasonal) weather and yield data sets. Minimum temperature, encompassing all the zones, was found to be increasing within the range of 0.06 to 0.44 °C per decade. The ‘kharif’ season maximum temperature trends were found increasing in most zones. In terms of annual and seasonal rainfall trends, the results were mostly non-significant, except for Bhabhar and Tarai Zone which had witnessed a very high decadal trend indicating towards the occurrences of intense rainfall events. North Eastern Plain Zone needs a special mention owing to its large number of extreme rainfall events in three categories (>50 to <100 mm/day; >100 to <150 mm/day; >150 mm/day). Considering the annual/seasonal temperature and rainfall variability in the region, the warming trend along with spatio-temporally uncertain rainfall is likely to inflict significant impact upon the rice crop. Consequently, there is a dire need to devise strategies capable of dealing with the impacts of the prevailing climate variability on rice yields in this state of India through development of suitable adaptation options for sustainable production. The continuous and rigorous studies into this field of agro-meteorology subjected to impact assessment call for international action plans that are designed in a frame of ‘bottom-up approach’ or a ‘local to regional to country level’ strategic implementation of adaptation options to sustain yields in the rice fields. © 2019, Springer Nature Switzerland AG.
Multivariate drought analysis for the temperature homogeneous regions of India: Lessons from the Gomati River basin
(John Wiley and Sons Ltd, 2022) Diva Bhatt; R.K. Mall; K. N. Prudhvi Raju; Shakti Suryavanshi
Droughts inflict significant loss on agricultural economies. Gomati River basin, the area of the present study, is located within the Ganga River floodplains, which approximately coincide with the north central temperature homogeneous region (NCTHR) of India. Gomati basin is a non-perennial one supporting water intensive agricultural crops. To ascertain the occurrence of droughts (if any) from 1986 to 2015 within Gomati River basin, in terms of inter-dependencies of drought causing variables through study of multivariate drought indices, is the main objective of the present study. Soil Water Assessment Tool (SWAT) was used in combination with the Copula approach to construct multivariate standardized drought indices (MSDIs) for drought onset detection through simulation in the face of data scarcity. Although MSDI based assessment of the basin as a whole did not detect any droughts, in the upper basin, MSDIs indicated the possibilities of impending agricultural droughts marked by their consistent variability around near-normal conditions. This methodology can be used to detect drought situations in data scarce non-perennial river basins within the Ganga River floodplains including the NCTHR of India. © 2022 The Authors. Meteorological Applications published by John Wiley & Sons Ltd on behalf of Royal Meteorological Society.
Potential impact of rainfall variability on groundwater resources: a case study in Uttar Pradesh, India
(Springer, 2020) Sangita Dey; Diva Bhatt; Saidul Haq; Rajesh Kumar Mall
Groundwater systems are largely influenced by rainfall variability which is considered the principal source of recharge. The present study explores the relation between the long-term rainfall (1992–2014) and the corresponding water table variation over the Varanasi district. The temporal trends of both the water table and long-term rainfall were analyzed using non-parametric Mann-Kendall time-series trend test. The district experienced an annual rainfall average of 876 mm during the study period. In the recent decade (2003–2014), the amount of annual rainfall and rainy days declined by 42 mm and 8 days, respectively, were compared with previous decade (1992–2002). The water table fluctuation had also shown decreasing trend in the recent decade and were compared with the previous decade. The frequent fluctuations in rainfall anomaly and water table fluctuation had been related to El Nino and La Nina events to study the impact of these events at regional scale. The intense cultivation of water intensive crops as well as rainfall variation was found to be one of the major causes behind the water table fluctuation in the study area. Therefore, artificial water recharge and change in cropping pattern through cultivating less water consuming crops with efficient irrigation technologies of water management may help to overcome the upcoming adverse situations. © 2020, Saudi Society for Geosciences.
Simulation modeling and climate change: issues and challenges
(2014) R.K. Mall; Diva Bhatt; Geetika Sonkar; T. Banerjee
[No abstract available]
Water in ancient indian perspective and ponds of Varanasi as water harvesting structures
(Springer International Publishing, 2015) K. N. Prudhvi Raju; Diva Bhatt
Rivers and river-valleys had been centres of development of civilisation. The importance of water as a precious resource had been realised by all civilisations to sustain life on earth. In ancient texts of India, it has been said, “where there is water, there is food; where there is food, there is life”. What was once a ubiquitous resource has become scarce and even in places where water is everywhere, it had become scarcer because of quality deterioration. The causes for the present state of affairs are: population increase, industrialisation, urbanisation, poor governance and management and peoples’ apathy and ignorance. © Capital Publishing Company 2015.