IITKGP

Bhabagrahi Sahoo

Associate Professor

School of Water Resources

+91-3222-281884

bsahoo@swr.iitkgp.ac.in

Research Areas

  • Real-time Flood Modeling and Forecasting
  • Integrated River Basin Management
  • Surface water - Groundwater Interaction
  • Meso-scale Solute Transport Dynamics
  • GIS & Remote Sensing in Water Resources
My research involves: Real-time Flood Modeling and Forecasting, Integrated River Basin Management, Surface water - Groundwater – Climate interaction, Meso-scale Solute Transport Dynamics, and Application of GIS & Remote Sensing in Water Resources for Predictions in Ungauged Basins.

The nature of research involves Real-time mapping of riverine heavy-metal pollution, source-identification and vulnerability assessment: Developed novel spectral fusion models using LANDSAT/MODIS Remote-Sensing (RS) imageries to assess concentrations of non-reactive pollutants at 30-m×1-day spatiotemporal resolutions along the Brahmani (Odisha) and Hooghly (West Bengal) Rivers. Developed hydrodynamic-based VPMM-AD-RS embedded-model framework and MIKE11-AD model for real-time assessment of these pollutant concentrations and river flows in ungauged river reaches to aid for river cleaning and pollutant-source management.

Runoff estimation using deterministic, conceptual and Remote-Sensing-based approaches: Since many river basins worldwide are ungauged, I have contributed significantly in developing simplified hydrodynamic models for runoff estimation under data-scarce conditions without compromising model accuracy, viz., VPMS, VPMD, VPMM, MMS, MMD, diffusion-analogy, RSR (reverse routing), and satellite image-based fusion models; and GIUH-Clark/GIUH-Nash models for catchment-scale flood estimation.

Real-time flood and groundwater level forecasting: For river basin management, developed VPMS-AR2 model for river flow-depth forecasting; and ANN, WAN, NARX, WNARX, VIC-WNARX, MIKE11-NAM-HD-WNARX, MIKE11-NAM-HD-LSTM, SWAT-LSTM, SWAT-WBiLSTM hybrid models for short-to-medium range streamflow forecasting; and integrated hsB-WNARX model for groundwater forecasting under climate change.

River basin management: Developed ehsB-VPMM surface water-groundwater interaction model for real-time groundwater level estimation; Assessed environmental flow requirement in the Tel River (Odisha), and Dri/Tangon Rivers (Arunachal Pradesh) for hydro-electrical projects; Developed MIKE-FLOOD model based flood inundations in Mahanadi River delta and SWMM-RRI based urban flood inundation model for Bhubaneswar city for flood hazard assessment and management. Developed KSOM-based methods for estimating missing hydro-meteorological timeseries data, Techniques for improving direct/indirect (MODIS-Terra/VIC) evapotranspiration estimates, HYDRUS-1D modelling for water-Nitrogen transports in soil-paddy-atmosphere system; and Low-cost rainwater harvesting and integrated water management technologies for climate resilient hilly-agriculture.
  • Copula-based probabilistic spectral algorithms for high-frequent streamflow estimation Sahoo D. P., Sahoo B. , Tiwari M. K. By Remote Sensing of Environment 251 112092- (2020)
  • Understanding the impacts of predecessor rain events on flood hazard in a changing climate. Khatun A., Ganguli P. , Bisht D. S., Chatterjee C. , Sahoo B. By Hydrological Processes 36 1-9 (2022)
  • A multilinear discrete Nash-cascade model for stage-hydrograph routing in compound river channels Sahoo B., Perumal M. , Moramarco T. , Barbetta S. , Sahoo S. By Hydrological Sciences Journal 65 335-347 (2020)
  • A novel embedded pothole module for Soil and Water Assessment Tool (SWAT) improving streamflow estimation in paddy-dominated catchments Dash S. S., Sahoo B. , Raghuwanshi N. S. By Journal of Hydrology 588 125103- (2020)
  • Is hillslope-based catchment decomposition approach superior to hydrologic response unit (HRU) for stream-aquifer interaction modelling: Inference from two process-based coupled models Sahoo S., Sahoo B. By Journal of Hydrology 591 - (2020)
  • An embedded VPMM-AD model for riverine transient flow and non-reactive contaminant transports Swain R., Sahoo B. , Perumal M. By Journal of Hydrology 563 711-725 (2018)
  • How reliable are the evapotranspiration estimates by Soil and Water Assessment Tool (SWAT) and Variable Infiltration Capacity (VIC) models for catchment-scale drought assessment and irrigation planning? Dash S.S., Sahoo B., Raghuwanshi N.S. By Journal of Hydrology 592 - (2021)
  • Effect of Low-Impact Development Scenarios on Pluvial Flood Susceptibility in a Scantily Gauged Urban-Peri-Urban Catchment Pati A., Sahoo B. By Journal of Hydrologic Engineering 27 - (2022)
  • A geomorphology-based integrated stream-aquifer interaction model for semi-gauged catchments Sahoo S., Sahoo B. By Hydrological Processes 33 1362-1377 (2019)

Principal Investigator

  • Operational Coastal Flood Management through Short-to-Medium Range (Real-time) Flood Vulnerability Mapping in the Brahmani-Baitarani River Basin Integrating Human and Climate Induced Impacts MHRD-STARS

Co-Principal Investigator

  • Development and Management of Surface Water Resources and Soil Moisture in Different Agro-Ecological Regions of India using Geoinformatics and Nano Technology ICAR - Indian Institute of Water Management (Formerly ICAR-Directorate of Water Management)
  • Hydro Geological investigation about water evaluation, availability and quality parameter for both Ground and surface sources at Lankapara Central Dooars Tea Estates within Alipurduar District Public Health Engineering Directorate, Govt. of West Bengal

Ph. D. Students

Ashrumochan Mohanty

Area of Research: Reservoir operation

Ashutosh Pati

Area of Research: Urban flood management

Aurobrata Das

Area of Research: Impact of climate change on water resources

Krishna Rawat

Area of Research: Hydrologic Modeling

Kunwar Abhishek Singh

Area of Research: Water Quality Monitoring and Management

Roshan Suryakant Mohanty

Area of Research: Hydrological Modeling

Sabinaya Biswal

Area of Research: Groundwater and Climate Change

Saidutta Mohanty

Area of Research: Hydrological modeling

Subhadeep Mandal

Area of Research: Climate Change Impact on River Baseflow and its Feedback