Glaciers are the storehouse of freshwater on Earth. High altitude Hindukush-Karakoram-Himalaya (HKH) region contains largest ice volume outside polar region. Billions of people depend on the freshwater originating from these glaciers. My research mainly focus to understand the response of glacier dynamics in changing climatescenarios and resulting contribution to regional water balance; to comprehend the timing and extent of Quaternary glaciations in the Himalayan region and its impact on landscape evolution; and to identify the risk of triggering glacial hazards in context to reported climate warming and glacial fluctuation and associated lake formation in the Himalaya in order to formulate risk-based adaptation strategies. I use geophysical field mapping (GPR, DGPS, Terrestrial Lidar, glaciological mass budget etc.), geoinformatics (Remote sensing and GIS), and geochronology (OSL and CRN) as a major tool to monitor glacier dynamics and numerical modelling to comprehend future evolution and water availability.