http://localhost:8081/jspui/handle/123456789/11 Thu, 07 May 2026 21:22:00 GMT 2026-05-07T21:22:00Z http://localhost:8081/jspui/handle/123456789/20592 Title: Impact of Climate Change on combined Flood and Drought events in India Authors: Salvadi, Chetan Kumar Abstract: Droughts and floods usually occur in all parts of the world. Several studies published previously have reported that climate change may exaggerate the severity and frequency of floods and droughts in different parts of the world. However, it is still unclear if the frequency of the co-occurrence of droughts and floods is being affected in the long term or not. Therefore, we analysed the changing characteristics of co occurrence of floods and droughts in India to understand “whether the co-occurrence of floods and droughts is increasing due to climate change?”. A copula-based joint probability-based approach is considered for analysing the changing nature of joint probabilities of compound drought-flood events in the same year. Also, we used the Standardised Weighted Average of Precipitation (SWAP) index to identify the drought and the flood events. We used gridded rainfall data of India Metrological Department at a 0.25-degree grid. This study revealed that the maximum number of grid points show an increase in monthly SWAP values in summer; however, the maximum number of grid points show a decrease in monthly SWAP values in all other seasons. However, in winter, the maximum number of grid points show a reduction in monthly SWAP values. The drought and flood analysis revealed that more grid points show decreasing value for both flood and drought return period corresponding to 5-year, 10-year, 25-year when each period is compared with its preceding period. This observation indicates an increase in the frequency of flood and drought in the succeeding periods. We have noticed more grid points showed considerable change in the drought return period. But fewer grid points showed a substantial shift in flood return periods. We also found an increase in the frequency of less intensity flood events in many parts of India when compared to high-intensity flood events. This analysis demonstrates an increase in the frequency of combined flood and drought events in the same year throughout India in the last three decades. Fri, 01 Jan 2021 00:00:00 GMT http://localhost:8081/jspui/handle/123456789/20592 2021-01-01T00:00:00Z http://localhost:8081/jspui/handle/123456789/20540 Title: IRRIGATION SCHEDULING AND CROP OPTIMIZATION ON JAMUNA FLOW IRRIGATION SCHEME, HOJAI, ASSAM Authors: Baruah, Papori Wed, 01 May 2024 00:00:00 GMT http://localhost:8081/jspui/handle/123456789/20540 2024-05-01T00:00:00Z http://localhost:8081/jspui/handle/123456789/20539 Title: Blue and Green Water Availability in the Upper Hemavathi Basin Authors: Navya, Kasoju Wed, 01 May 2024 00:00:00 GMT http://localhost:8081/jspui/handle/123456789/20539 2024-05-01T00:00:00Z http://localhost:8081/jspui/handle/123456789/20493 Title: DECIPHERING HYDROLOGICAL RESPONSES OF SPRINGFLOW SYSTEMS IN THE LESSER INDIAN HIMALAYAS Authors: Dass, Bhargabnanda Abstract: Springs are indispensable source of freshwater for mountain communities in the Indian Himalayan Region (IHR). These life-supporting springs are either drying up or becoming seasonal, causing hydrological imbalance in the fragile mountain watersheds due to rapid, unplanned urban growth and the mismanagement of vital natural resources resulting in water scarcity in these regions, drastically impacting the local inhabitants. Spring watershed or Springshed management, which is a transdisciplinary approach to address water security challenges for the areas that depend upon spring discharge, is essential for bolstering resilience and adaptation to water and climate vulnerabilities. But the complexity of geogenic, anthropogenic and climatic pressures together on the discharging spring aquifer besides multi-sectoral consumptive demands necessitates a comprehensive science-evidence based management optimization of spring water resources. Considering the water stress situation in the IHR there is an increasing need to understand the hydrology of Himalayan springsheds. Despite the importance of the mountain systems for regional hydrology and water supplies, the processes controlling water fluxes are not well understood; and we even poorly understand hydrologic responses connected to the region’s geology. Above all, the lack of dedicated observatories and information systems hamper improvements of the hydrologic dataset. The IHR is also highly sensitive to hydrologic variables over space and time therefore, a holistic process of understanding and high-quality reliable data from advanced field-observation techniques are necessary to understand hydrological processes. Springs which are the common sources of water for the communities in the IHR also urgently need measures to monitor the water quantity and quality to ensure water and livelihood security in the IHR. Keeping these knowledge gaps and concerns in mind a detailed investigative study which brings together the aspects of hydrology, hydrogeology, hydrogeochemistry and stable isotopic analysis has been conceptualized and executed while also integrating stakeholder welfare and participatory management in the research design. This research study investigates spring hydrological processes across three different regions in the lesser IHR in Uttarakhand, namely Almora, Pauri-Garhwal and Tehri-Garhwal. Wed, 01 May 2024 00:00:00 GMT http://localhost:8081/jspui/handle/123456789/20493 2024-05-01T00:00:00Z