Prof. RAAJ Ramsankaran
Professor - IITB
Department of Civil Engineering
Indian Institute of Technology Bombay
Powai, Mumbai-400076
Maharashtra, India.
Hydro-Remote Sensing Applications Group
Department of Civil Engineering - IITB
Papers Published /In Press in Peer Reviewed Journals
  • 64 Anita Chandrasekharan and RAAJ Ramsankaran (2023). Reconstructing 32 years (1989-2020) of Annual Glacier Surface Mass Balance in Chandra Basin, Western Himalayas, India. Regional Environmental Change(Accepted)
  • 63 Siddhi Garg, Perumal Jayaraman Navinkumar, Ajay Godara, Rakesh Sahu, Dhiraj Kumar Singh, RAAJ Ramsankaran (2023). Remote sensing the evolution of debris-covered Panchi Nala-A glacier, India (1971-2021) from satellites and Unmanned Aerial Vehicles Regional Environmental Change, 23, 103. DOI:10.1007/s10113-023-02096-1
  • 62 Srinivasrao Tanniru and RAAJ Ramsankaran (2023). Machine Learning-Based Estimation of High-Resolution Snow Depth in Alaska Using Passive Microwave Remote Sensing Data. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 16, pp. 6007-6025. DOI:10.1109/JSTARS.2023.3287410
  • 61 Ashim Sattar, Simon Allen, Martin Mergili, Wilfried Haeberli, Holger Frey, Anil V. Kulkarni, Umesh K. Haritashya, Christian Huggel, Ajanta Goswami, RAAJ Ramsankaran (2023) Modeling Potential Glacial Lake Outburst Flood Process Chains and Effects from Artificial Lake-Level Lowering at Gepang Gath Lake, Indian Himalaya. Journal of Geophysical Research: Earth Surface, 128 (3), e2022JF006826. DOI:10.1029/2022JF006826
  • 60 Srinivasrao Tanniru and RAAJ Ramsankaran (2023). Passive Microwave Remote Sensing of Snow Depth: Techniques, Challenges and Future Directions. Remote Sensing, 15(4), art.no.1052. DOI:10.3390/rs15041052
  • 59 Prateek Gantayat and RAAJ Ramsankaran (2023). Modelling evolution of a large, glacier-fed lake in the Western Indian Himalaya. Nature Scientific Reports, 13, art.no. 1840. DOI: 10.1038/s41598-023-28144-8
  • 58 RAAJ Ramsankaran, Prateek Verma, Ulfat Majeed and Irfan Rashid (2023). Kayak-based low-cost hydrographic surveying system: A demonstration in high altitude proglacial lake associated with Drang Drung Glacier, Zanskar Himalaya. Journal of Earth System Sciences, 132, 9. DOI: 10.1007/s12040-022-02021-w
  • 57 R Visweshwaran , RAAJ Ramsankaran, T. I. Eldho and Manoj Kumar Jha.(2022). Hydrological Impact Assessment of Future Climate Change on a Complex River Basin of Western Ghats, India. Water, 14, art. no. 3571. DOI:10.3390/ w14213571
  • 56 Antara Dasgupta, Stefania Grimaldi, RAAJ Ramsankaran, Valentijn R.N. Pauwels, Jeffrey P. Walker.(2022). A simple framework for calibrating hydraulic flood inundation models using Crowd-sourced water levels. Journal of Hydrology, Vol. 614, art.no.128467. DOI: 10.1016/j.jhydrol.2022.128467
  • 55 Vasaw Tripathi, Andreas Groh, Martin Horwath and RAAJ Ramsankaran.(2022). Scaling methods of leakage correction in GRACE mass change estimates revisited for the complex hydro-climatic setting of the Indus Basin. Hydrology and Earth System Sciences, 26, 4515–4535, 2022. DOI: 10.5194/hess-26-4515-2022
  • 54 Sangita S. Tomar, RAAJ Ramsankaran and Jeffrey P. Walker.(2022). Spatially varying WIndow based maximum likelihood feature tracking (SWIFT) method for glacier surface velocity estimations. Geocarto International, DOI: 10.1080/10106049.2022.2082556
  • 53 Bramha Dutt Vishwakarma, RAAJ Ramsankaran, Mohd. Farooq Azam , Tobias Bolch , Arindan Mandal , Smriti Srivastava , Pankaj Kumar , Rakesh Sahu, Perumal Jayaraman Navinkumar, Srinivasa Rao Tanniru , Aaquib Javed , Mohd Soheb , A. P. Dimri , Mohit Yadav , Balaji Devaraju, Pennan Chinnasamy, Manne Janga Reddy, Geetha Priya Murugesan, Manohar Arora, Sharad K. Jain , C. S. P. Ojha, Stephan Harrison and Jonathan Bamber.(2022). Challenges in Understanding the Variability of the Cryosphere in the Himalaya and Its Impact on Regional Water Resources. Frontiers in Water, vol. 4, art. no:909246. DOI: 10.3389/frwa.2022.909246
  • 52 Estifanos Lemma, Shruti Upadhyaya, and RAAJ Ramsankaran .(2022). Meteorological drought monitoring across the main river basins of Ethiopia using satellite rainfall product. Environmental Systems Research, vol.11 art. No.7. DOI: 10.1186/s40068-022-00251-x
  • 51 Manh-Hung Le, Nguyen Q Binh, Pham T Hung, Amol Patil, Do X Hong, RAAJ Ramsankaran , John D. Bolten, and Venkataraman Lakshmi.(2022).Assimilation of SMAP Products for Improving Streamflow Simulations over Tropical Climate Region—Is Spatial Information More Important Than Temporal Information? Remote Sensing vol.14 (7), art. No.1607. DOI: 10.3390/rs14071607
  • 50 R Visweshwaran, RAAJ Ramsankaran, TI Eldho and Sivaramakrishnan Lakshmivarahan. (2022). Sensitivity based soil moisture assimilation for improved streamflow forecast using a novel Forward Sensitivity Method (FSM) approach. Water Resources Research, 58, art. No. e2021WR031092. DOI: 10.1029/2021WR031092
  • 49 Prateek Verma and RAAJ Ramsankaran .(2022) .Semi-Automated Mapping of Glacial Lakes- A Study in Sikkim Himalayas, India. Geocarto International , DOI: 10.1080/10106049.2021.1996640
  • 48 Sangita Kumari, Ankur Pandit, Lavkush Patel, RAAJ Ramsankaran, Parmanand Sharma and Ramanathan A.L. (2020). Modelling of ice thickness and storage volume of Svalbard Glaciers monitored through Indian Arctic Programme. Polar Science, vol.30, art.no. 100741 DOI: 10.1016/j.polar.2021.100741
  • 47 Prateek Verma, Sanjay Ghosh and RAAJ Ramsankaran. (2021). Estimation of Snow Depletion Curve for Gangotri Basin using Multi-Source Remote Sensing Data. ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences V-3-2021, 197–202.
  • 46 Sangita Kumari, Ankur Pandit, RAAJ Ramsankaran , Mohd Soheb, Thupstan Angchuk,and Ramanathan A.L.(2021).Modelling ice thickness distribution and volume of Patsio Glacier in Western Himalayas. Journal of Earth System Science Vol. 130, art.no 146 DOI: 10.1007/s12040-021-01643-w
  • 45 Anugya Shukla., Kamal Jain, RAAJ Ramsankaran , Eswar Rajasekaran.(2021).Understanding the macro-micro dynamics of urban densification: A case study of different sized Indian cities. Land Use Policy Vol. 107, art.no 105469. DOI: 10.1016/j.landusepol.2021.105469
  • 44 Ashish Kumar, RAAJ Ramsankaran , Luca Brocca and Francisco Munoz-Arriola.(2021).A simple machine learning approach to model real-time streamflow using satellite inputs: Demonstration in a data scarce catchment. Journal of Hydrology Vol. 595, art.no.126046. DOI: 10.1016/j.jhydrol.2021.126046
  • 43 Antara Dasgupta, Renaud Hostache, RAAJ Ramsankaran ,Guy Schumann, Stefania Grimaldi, Valentijn Pauwels, and Jeffrey Walker .(2021).On the impacts of observation location, timing and frequency on flood extent assimilation performance. Water Resources Research Vol. 57 (2), art.no: e2020WR028238. DOI:10.1029/2020WR028238
  • 42 Antara Dasgupta, Renaud Hostache, RAAJ Ramsankaran ,Guy Schumann, Stefania Grimaldi, Valentijn Pauwels, and Jeffrey Walker .(2021).A mutual information-based likelihood function for particle filter flood extent assimilation. Water Resources Research Vol. 57 (2), art.no: e2020WR027859. DOI: 10.1029/2020WR027859
  • 41 RAAJ Ramsankaran ,Perumal Jayaraman Navinkumar, Ajay Dashora, Anil Kulkarni.(2021).UAV-based Survey of Glaciers in Himalayas: Challenges and Recommendations. Journal of the Indian Society of Remote Sensing. DOI: 10.1007/s12524-020-01300-7
  • 40 Daniel Farinotti, Douglas Brinkerhoff, Johannes Fürst, Prateek Gantayat, Fabien Gillet-Chaulet, Matthias Huss, Paul Leclercq, Hansruedi Maurer, Mathieu Morlighem, Ankur Pandit, Antoine Rabatel, RAAJ Ramsankaran ,Thomas Reerink, Ellen Robo, Emmanuel Rouges, Erik Tamre, Ward Pelt, Mauro Werder, Mohd Farooq Azam, Huilin Li and Liss Andreassen .(2020). Results from the Ice Thickness Models IntercomparisoneXperiment phase 2 (ITMIX2). Frontiers in Earth Science , vol.8, art. no: 571923. DOI: 10.3389/feart.2020.571923
  • 39 Ankur Pandit and RAAJ Ramsankaran .(2020). Identification of Potential Sites for Future Lake Formation and Expansion of Existing Lakes in Glaciers of Chandra Basin, Western Himalayas, India. Frontiers in Earth Science , vol.8, art. no: 500116. DOI:10.3389/feart.2020.500116
  • 38 Ankur Pandit and RAAJ Ramsankaran .(2020). Modeling ice thickness distribution and storage volume of glaciers in Chandra Basin, western Himalayas. Journal of Mountain Science , vol. 17, pp: 2011–2022. DOI: 10.1007/s11629-019-5718-y
  • 37 Swathy Sunder, RAAJ Ramsankaran and Balaji Ramakrishnan .(2020). Machine learning techniques for regional scale estimation of high-resolution cloud-free daily sea surface temperatures from MODIS data. ISPRS Journal of Photogrammetry and Remote Sensing , vol.166, pp. 228-240. DOI: 10.1016/j.isprsjprs.2020.06.008
  • 36 Vasu Sathyakumar, RAAJ Ramsankaran and RonitaBardhan .(2020). Geospatial approach for assessing spatiotemporal dynamics of urban green space distribution among neighbourhoods: A demonstration in Mumbai. Urban Forestry and Urban Greening , vol. 48. art.no: 126585. DOI: 10.1016/j.ufug.2020.126585
  • 35 Anant Kumar, Harendra Singh Negi, Kamal Kumar, Neha Kanda, Kamal Kant Singh, Ankur Pandit and RAAJ Ramsankaran (2020). Estimation of recent changes in thickness and mass balance of the Patsio glacier in the Great Himalayan region using Geodetic technique and Ancillary data. Geocarto International , vol.35(1), pp. 47-63. DOI: 10.1080/10106049.2018.1506506
  • 34 Ashish Kumar, RAAJ Ramsankaran , Luca Brocca and Francisco Munoz Arriola(2019). A Machine Learning Approach for Improving Near-Real-Time Satellite-Based Rainfall Estimates by Integrating Soil Moisture. Remote sensing , Vol.11(19), art. no. 2221. DOI: 10.3390/rs11192221
  • 33 Pratiksha Jain and RAAJ Ramsankaran .(2019). GIS-based Integrated Multi-Criteria Modelling Framework for Watershed Prioritisation in India—A Demonstration in Marol Watershed. Journal of Hydrology , vol. 578,art.no. 124131. DOI: 10.1016/j.jhydrol.2019.124131
  • 32 Ashish Kumar, Antara Dasgupta, Sujit Lokhande, RAAJ Ramsankaran .(2019). Benchmarking the Indian National CartoDEM against SRTM for 1D hydraulic modelling. International Journal of River Basin Management , vol. 17(4), pp. 479-488. DOI: 10.1080/15715124.2019.1606816
  • 31Anne O'Carroll, Edward Armstrong, Helen Beggs, Marouan Bouali, Kenneth Casey, Gary Corlett, Prasanjit Dash, Craig Donlon, Chelle Leigh Gentemann, Jacob Høyer, Alexander Ignatov, Kamila Kabobah, Misako Kachi, Yukio Kurihara, Ioanna Karagali, Eileen Maturi, Christopher John Merchant, Salvatore Marullo, Peter Minnett, Matthew Pennybacker, Balaji ramakrishnan, RAAJ Ramsankaran , Rosalia Santoleri, Swathy Sunder, Stéphane Saux Picart, Jorge Vázquez-Cuervo, Werenfrid Wimmer.(2019). Observational Needs of Sea Surface Temperature. Frontiers in Marine Science , vol.6, art.no. 420. DOI: 10.3389/fmars.2019.00420
  • 30 Estifanos Lemma, Shruti Upadhyaya and RAAJ Ramsankaran .(2019). Investigation of satellite and reanalysis rainfall products at monthly timescales across different rainfall regimes of Ethiopia. International Journal of Remote Sensing , vol.40(10), pp 4019-4042. DOI: 10.1080/01431161.2018.1558373
  • 29 Vasu Sathyakumar, RAAJ Ramsankaran and RonitaBardhan.(2018). Linking remotely sensed Urban Green Space (UGS) distribution patterns and Socio-Economic Status (SES) - A multi-scale probabilistic analysis based in Mumbai, India. GIScience and Remote Sensing , vol.56(5), pp. 645-669. DOI: 10.1080/15481603.2018.1549819
  • 28 Pratiksha Jain and RAAJ Ramsankaran .(2018). GISbased modeling of soil erosion processes using the modified Morgan–Morgan Finney (M-MMF) model in a large watershed having vast agro-climatological differences. Earth Surface Processes and Landforms , vol.43(10), pp. 2064-2076. DOI: 10.1002/esp.4372
  • 27 Anita Chandrasekharan, RAAJ Ramsankaran , Ankur Pandit and Antoine Rabatel.(2018). Quantification of annual glacier surface mass balance for the ChhotaShigri Glacier, Western Himalayas, India using an Equilibrium-Line Altitude (ELA) based approach. International Journal of Remote Sensing , vol.39(23), pp. 9092-9112. DOI: 10.1080/01431161.2018.1506182
  • 26 RAAJ Ramsankaran , Ankur Pandit, Mohd Farooq Azam.(2018). Spatially distributed ice-thickness modelling for ChhotaShigri Glacier in western Himalayas, India. International Journal of Remote Sensing , vol.39(10), pp. 3320-3343. DOI: 10.1080/01431161.2018.1441563
  • 25 Antara Dasgupta, Stefania Grimaldi, RAAJ Ramsankaran , Valentijn Pauwels, and Jeffrey Walker(2018). Towards operational SAR-based flood mapping using neuro-fuzzy texture-based approaches. Remote Sensing of Environment , vol. 215(15), pp.313-329. DOI: 10.1016/j.rse.2018.06.019
  • 24 Amol Patil and RAAJ Ramsankaran .(2018). Improved Streamflow Simulations by Coupling SMAR in EnKF-based Hydrological Data Assimilation Framework. Advances in Water Resources , vol.121, pp. 173-188. DOI: 10.1016/j.advwatres.2018.08.010
  • 23 Shruti Upadhyaya and RAAJ Ramsankaran .(2017).Comprehensive inter-comparison of INSAT multispectral rainfall algorithm estimates and TMPA 3B42-RT V7 estimates across different climate regions of India during southwest monsoon period. Environmental Monitoring and Assessment , vol.190, art.no: 45. DOI:10.1007/s10661-017-6411-7
  • 22 Shruti Upadhyaya and RAAJ Ramsankaran .(2017). Error Modelling for Modified-INSAT Multi-Spectral Rainfall Algorithm. International Journal of Remote Sensing , 39(6), pp. 1836-1852. DOI: 10.1080/01431161.2017.1415483
  • 21 Mukesh Kiran, Nagendra. R. Velaga, and RAAJ Ramsankaran . (2017). A Two-Stage Extended Kalman Filter Algorithm for Vehicle Tracking from GPS Enabled Smart Phones through Crowd-Sourcing. European Transport / Trasporti Europei, Vol. 65 (8), 2017, pp. 1-16.
  • 20 Smarika Kulshrestha, RAAJ Ramsankaran , Ajay Kumar, Manohar Arora and A.R. Senthil Kumar.(2017).Investigating the Performance of Snowmelt Runoff Model Using Temporally Varying Near-surface Lapse Rate in Western Himalayas. Current Science , 114(4), pp. 808-813. DOI: 10.18520/cs/v114/i04/808-813
  • 19 Amol Ashok Patil and RAAJ Ramsankaran .(2017).Improving Streamflow Simulations and Forecasting Performance of SWAT Model by Assimilating Remotely Sensed Soil Moisture Observations. Journal of Hydrology , vol.555, pp. 683-696. DOI: 10.1016/j.jhydrol.2017.10.058
  • 18 Swathy Sunder, RAAJ Ramsankaran and Balaji Ramakrishnan.(2017). Inter-comparison of remote sensing sensing-based shoreline mapping techniques at different coastal stretches of India. Environmental Monitoring and Assessment , vol.189,art.no: 290. DOI: 10.1007/s10661-017-5996-1
  • 17 Daniel Farinotti, Douglas Brinkerhoff, Garry Clarke, Johannes Fürst, Holger Frey, Prateek Gantayat, Fabien Gillet-Chaulet, Claire Girard, Matthias Huss, Paul Leclercq, Andreas Linsbauer, Horst Machguth, Carlos Martin, Fabien Maussion, Mathieu Morlighem, Cyrille Mosbeux, Ankur Pandit, Andrea Portmann, Antoine Rabatel, RAAJ Ramsankaran , Thomas Reerink, Olivier Sanchez, Peter Stentoft, Sangita Kumari, Ward Pelt, Brian Anderson, Toby Benham, Daniel Binder, Julian Dowdeswell, Andrea Fischer, Kay Helfricht, Stanislav Kutuzov, Ivan Lavrentiev, Robert McNabb, G. Hilmar Gudmundsson, Huilin Li, and Liss Andreassen.(2017). How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models IntercomparisoneXperiment. The Cryosphere , 11, 949–970. DOI: 10.5194/tc-11-949-2017
  • 16 Supantha Paul, Subimal Ghosh, Robert Oglesby, Amey Pathak, Anitha Chandrasekharan and RAAJ Ramsankaran .(2016). Weakening of Indian Summer Monsoon Rainfall due to Changes in Land Use Land Cover. Scientific Reports , vol.6, art. no: 32177. DOI: 10.1038/srep32177
  • 15 Shruti Upadhyaya and RAAJ Ramsankaran .(2016).Modified-INSAT Multispectral Satellite Rainfall Algorithm (M-IMSRA) at Climate Region Scale –Development and Validation. Remote Sensing of Environment , vol.187(15), pp. 186-201. DOI: 10.1016/j.rse.2016.10.013
  • 14 Shruti Upadhyaya and RAAJ Ramsankaran .(2014). Support Vector Machine (SVM) Based Rain Area Detection from Kalpana-1 Satellite Data. ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences , vol. II-8. DOI: 10.5194/isprsannals-II-8-21-2014
  • 13 Shruti Upadhyaya and RAAJ Ramsankaran .(2014).Multi-Index Rain Detection: A New Approach for Regional Rain Area Detection from Remotely Sensed Data. Journal of Hydrometeorology , vol.15(6), pp. 2314–2330. DOI: 10.1175/JHM-D-14-0006.1
  • 12 Ankur Pandit, RAAJ Ramsankaran and Y.S. Rao .(2014). Generation and Validation of the Interferometric SAR DEMs from TanDEM-X data for Gangotri and Hamtah Glaciers of Indian Himalayas. Procedia Technology , vol.16.pp. 793-805. DOI: 10.1016/j.protcy.2014.10.029
  • 11 Junming Liu, Jianxi Huang, Liyan Tian, Hongyuan Ma, Wei Su, Wenbin W, RAAJ Ramsankaran , Xiaodong Zhang and Dehai Zhu (2014). Regional winter wheat yield prediction by integrating MODIS LAI into the WOFOST model with sequential assimilation technique. Journal of Food Agriculture and Environment , vol. 12(1), pp. 180-187
  • 10 RAAJ Ramsankaran , Umesh Chandra Kothyari, Sanjay Kumar Ghosh, Andreas Malcherek and Krishnan Murugesan. (2013). Physically-based distributed soil erosion and sediment yield model (DREAM) for simulating individual storm events. Hydrological Sciences Journal , vol. 58(4), pp. 872-891. DOI: 10.1080/02626667.2013.781606
  • 9 Huang, J., Xu, J., Liu, X., RAAJ Ramsankaran , Wang, L., and Su, W. (2012). Geospatial based assessment of spatial variation of groundwater nitrate nitrogen in Shandong intensive farming regions of China. Sensor Letters , vol.10, pp. 491-500. DOI: 10.1166/sl.2012.1876
  • 8 RAAJ Ramsankaran , Umesh Kothyari, Sanjay Ghosh, Andreas Malcherek and Murugesan Krishnan. (2012). Geospatial based Distributed Rainfall-Runoff model for Simulation of Internal and Outlet Responses in a Semi Forested Watershed. Hydrological Processes , vol. 26 (9), pp. 1405-1426. DOI: 10.1002/hyp.8271
  • 7 RAAJ Ramsankaran , Christian Maerker and Andreas Malcherek. (2010). Numerical modelling of hydrodynamics and sediment transport process during storm events in a non-perennial river. Journal of Hydrology and Hydromechanics , vol. 58(1), pp. 36-48. DOI: 10.2478/v10098-010-0005-1
  • 6 Umesh Kothyari, RAAJ Ramsankaran , Sathish Kumar, D., Sanjay Ghosh and Nisha Mendiratta.(2010). Geospatial based automated watershed modeling in Garhwal Himalaya. Journal of Hydroinformatics , vol. 12(4), pp. 502-520. DOI: 10.2166/hydro.2010.024
  • 5 RAAJ Ramsankaran ,Umesh Kothyari, and Jiwan Rawat.(2009). GIS based runoff estimation and soil erosion assessment by WEPP model: a study on Kaneli watershed in the Himalayan region. Hydrological Sciences Journal , vol. 54(3), pp. 513-525. DOI: 10.1623/hysj.54.3.513
  • 4 RAAJ Ramsankaran , Umesh Kothyari, Sanjay Ghosh and Andreas Malcherek. (2009). GIS based Hydrological Modelling of Extreme Events in a Forested Mountainous Catchment. IHP VII, Technical Documents in Hydrology , No. 84, pp. 49-54. UNESCO Working Series SC-2009/WS/11
  • 3 Su Wei, Li Dao-Liang, Sun Zhong-Ping, RAAJ Ramsankaran ,Zhu Xiang and Guo Xiang-Yun. (2009). Vegetation recovery monitoring over the waste dump in Haizhou opencast coalmine area, China, during 1975-2000 using NDVI and VF index. Journal of Indian Society of Remote Sensing , vol.37, pp. 631-645. DOI: 10.1007/s12524-009-0059-x
  • 2 RAAJ Ramsankaran , Ramalingam, M., Sanjay Ghosh and Umesh Kothyari. (2008). Mapping of Suspended Sediments using Site Specific Seasonal Algorithms. Journal of Indian Society of Remote Sensing , vol.36, pp. 61-68. DOI: 10.1007/s12524-008-0006-2
  • 1 RAAJ Ramsankaran , Umesh Kothyari, S. Dasgupta, Jiwan Rawat, and Sathish Kumar . (2007). Modeling soil erosion in a Himalayan watershed. Geospatial Today , 6(10),18-23.