A5086165333- Landslides and related hazards
- Hydrology and Sediment Transport Processes
- Geology and Paleoclimatology Research
- Hydrology and Watershed Management Studies
- Cryospheric studies and observations
- Soil erosion and sediment transport
- Flood Risk Assessment and Management
- Groundwater and Watershed Analysis
- Geological formations and processes
- Karst Systems and Hydrogeology
- Geotourism and Geoheritage Conservation
- Southeast Asian Sociopolitical Studies
- Geological and Geochemical Analysis
- South Asian Studies and Conflicts
- Tree Root and Stability Studies
- earthquake and tectonic studies
- Turtle Biology and Conservation
- Geochemistry and Geologic Mapping
- Climate variability and models
- Soil Geostatistics and Mapping
- Hydrological Forecasting Using AI
- Advanced Image Fusion Techniques
- Climate change and permafrost
- Tree-ring climate responses
- Soil and Land Suitability Analysis
O. P. Jindal Global University
2023-2024
University of Delhi
2012-2023
Wadia Institute of Himalayan Geology
2020-2022
Guru Gobind Singh Indraprastha University
2021-2022
Jawaharlal Nehru University
2017-2021
National Institute of Disaster Management
2018
Abstract Himalayan rivers transport around a gigaton of sediment annually to ocean basins. Mountain valleys are an important component this routing system: storage in these acts buffer climatic and tectonic signals recorded by downstream sedimentary systems. Despite critical need understand the spatial distribution, volume longevity valley fills, controls on location geometry unknown, estimates volumes based assumptions valley-widening processes. Here we extract over 1.5 million valley-floor...
Abstract This study explores paleoflood deposits of the Siang River, known as Tsangpo in Tibet. The river that often experiences large floods brings down huge amount sediment and water adversely affect downstream regions with human populations states northeast Himalaya its foreland. Along it's ~300 km mountainous stretch we collected samples for sedimentological, petrographic Sr–Nd isotopic to explore provenance dated paleofloods (via optically stimulated luminescence, OSL). Geomorphic...
Abstract To what extent can we treat topographic metrics such as river long profiles a long‐term record of multiple extreme geomorphic events and hence use them for hazard prediction? We demonstrate that in an area rapid mountain erosion where the landscape is highly reactive to events, channel steepness measured by integrating over upstream distance (chi analysis) be used indicator change during flash floods. compare normalized impact devastating floods upper Ganga Basin Uttarakhand,...
Floods are known to be one of the greatest disasters in documented human history. In Indian subcontinent, Ganga‐Brahmaputra plains annually accommodate monsoon‐driven flooding Brahmaputra River and its tributaries, causing widespread flood inundation geomorphic changes. present study, we maps Assam suggest a possible explanation for frequent areas. We have used novel SAR (Synthetic Aperture Radar)‐based approach comprehensive mapping Assam. The Google Earth Engine (GEE), cloud‐based data...
Sediment cascades from the high mountains of Himalaya are initiated in steep glaciated and fluvial landscapes transfer downstream through alluvial bedrock reaches river network before exiting at mountain front. Understanding how stochastic triggers for processes such as landslides, GLOFS ‘cloudbursts’ translate into hazards sediment-rich floods underpins changing risk profile communities these settings. In a collaboration between UK Natural Environment Research Council...
Abstract Understanding the processes and mechanisms responsible for exhumation are essential determining evolution of landscapes. Our knowledge these issues in continental convergent margins is still incomplete despite decades research. Here, we present a record rates obtained from thermochronology across collision zone Himalayan‐Tibetan orogen, which has been carved by dextral Karakoram fault (KF) along its western margin. results KF suggest that transpression controlled ∼10 to 8 Ma....
Depositional river terraces in tectonically active regions are used to determine the relative roles of tectonic and climatic changes landscape evolution an area. Apart from providing evidences shifts, these over a long period act as source sediment, which is eroded them. A terrace located Lesser Himalaya known age small drainage network developed it (indicating be only erosion), was studied estimate rate erosion. The erosion calculated by comparing pre-erosion topography modelled this study...
The length of the main trunk in a river basin is an important morphometric parameter and it depends on size drainage basin. Ganga River Basin one largest basins world with considered to be stem. Variable lengths this literature motivated us study its exact also test whether geomorphically longest results show that maximum 2758 km attained when source at headstream Tons River. This more than any traditional literature. We propose call segment as Himalayan Foreland
The present study reveals distinct spatial variability of summer monsoon precipitation in Indian subcontinent during Northgrippian to Meghalayan transition.Protracted dry phase lasting ~1000 yrs was observed ~4.2 ka BP southern and northwestern India whereas 200-300 event occurred northeastern parts.Strong El Niño conditions beginning ~4.3 kyr were associated with the millennial long dryness western parts but its influence limited eastern region.Cross-verified, high-resolution records from...