Dr. Sharad Gokhale

Professor of Environmental Engineering at the Department of Civil Engineering IIT Guwahati. His research is principally in applied meteorology and mitigation of impacts. It includes urban air quality, dispersion and chemical processes and urban environmental noise.


Tel:+91 361 258 2419 (O)

Tel:+91 361 258 4419 (R)

Fax:+91 361 258 2440 (Civil Office)

E-mail: sharadbg@iitg.ernet.in

Media news:




Ph.D. 2004. Urban Air Quality and Modelling, Indian Institute of Technology Delhi.



Research Area:

Air and noise pollution

Research underway:

No. Research Research team
1 Episodic air quality due to CO, PM2.5, and Black Carbon in an urban traffic corridor. Mitali Sahu (Ph.D).
2 Urban black carbon - global impacts and local mitigations Ardhendu Shekhar (Ph.D), Gulab Singh (Ph.D), Neeldip Barman (M. Tech).
3 Experimental investigation of the formation of secondary organic aerosols due to VOCs and ozone reactions in urban indoor environments located along roadways B. Hazarika (Ph.D)
4 Using field and modelling studies to investigate into noise propagation in urban traffic corridor. Dr. Anirban K. Chaudhury (PDF), Rahul Choudhury (JRF), Argha Kamal Guha (Ph.D), Rajib Das (JRF).
5 GHGs emissions from conventional and conserved agriculture practices in the NE region of India. Dr. Jayashree Dutta (PDF).

Research updates:

The preliminary estimates of the statistical noise indicators show the distribution of noise levels along a suburban roadway in Guwahati with a honking effect.


Peer reviewed international journals:

  1. Padhi, S. and Gokhale, S. (2017) Treatment of gaseous volatile compounds using a rotating biological filter. Bioresource Technology, Vol. 244 (1), 270-280.

  2. Dutta, J. and Gokhale, S. (2017) Field investigation of carbon dioxide (CO2) fluxes and organic carbon from a conserved paddy field of North-East India. Int. Soil & Water Conservation Res., Vol. 5, 325-334.

  3. Cyrille, M. A., David, M., Andre, L., Ebenezer, M., and Gokhale, S. (2017) Projecting impacts of two-wheelers on urban air quality of Douala, Cameroon. Transportation Research, Part D, Vol. 52, 49-63.

  4. Cyrille, M. A., David, M., Andre, L., Ebenezer, M., and Gokhale, S. (2017) Evaluating impacts of two-wheeler emissions on roadside air quality in the vicinity of a busy traffic intersection in Douala, Cameroon. Air Quality, Atmosphere and Health, Vol. 10(4), 521-532.

  5. Padhi, S. and Gokhale, S. (2017) Benzene biodegradation by indigenous mixed microbial culture: Kinetic modelling and process optimization. Int. Biotechnology and Biodegradation, Vol. 119, 511-519.

  6. Bhautmage, U. and Gokhale, S. (2016) Effects of moving-vehicle wakes on pollutant dispersion inside a highway road tunnel. Environmental Pollution, Vol. 218, 783-793.

  7. Choudhary, A. and Gokhale, S. (2016) Urban real-world driving traffic emissions during interruption and congestion. Transportation Research, Part D, Vol. 43, 59-70.

  8. Padhi, S. and Gokhale, S. (2016) Benzene control from waste gas streams with a sponge-medium based rotating biological contactor. Int. Biodeterioration and Biodegradation, Vol. 109, 96-103.

  9. Gokhale, S. (2016) Effects of engineered nanomaterials released into the atmosphere. J. Hazard. Toxic Radioact. Waste, Vol. 20 (1), B4015005(1)-B4015005(12).

  10. Thaker, P. and Gokhale, S. (2016) The impact of traffic-flow-patterns on air quality in urban street canyons. Environmental Pollution, Part A, Vol. 208, 161-169.

  11. Singh, N. P. and Gokhale, S. (2015) A method to estimate spatiotemporal air quality in an urban traffic corridor. Science of the Total Environment, Vol. 538,458-467.

  12. Abhijit, KV and Gokhale, S. (2015) Passive control potential of trees and on-street parked cars in reduction of air pollution exposure in urban street canyons. Environmental Pollution, Vol. 204, 99-108.

  13. Durga Ch., S. and Gokhale, S. (2015) Monitoring and assessment of O3 and PM1 in the microenvironment of a workplace. Environmental Modelling and Assessment, Vol. 20 (5), 521 - 534.

  14. Padhi, S. K. and Gokhale, S. (2014) Biological oxidation of gaseous VOCs - rotating biological contactor a promising and eco-friendly technique. The Journal of Environmental Chemical Engineering, Vol. 2(4), 2085-2102.

  15. Gokhale, S. (2012) Impacts of traffic-flows on vehicular-exhaust emissions at traffic junctions. Transportation Research – Part D Transport and Environment, Vol. 17 (1), 21-27.

  16. Gokhale, S. (2011) Traffic-flow pattern and meteorology at two distinct urban traffic junctions with impacts on air quality. Atmospheric Environment, Vol. 45(10), 1830-1840.

  17. Pandian, S, Gokhale, S and Ghoshal, AK (2011) An open-terrain line source model coupled with street-canyon effects to forecast carbon monoxide at traffic roundabout. Science of the Total Environment, Vol. 409 (6), 1145-1153.

  18. Gokhale, S and Patil, R (2010) Uncertainty analysis of PM10 and PM2.5 at non-signalized urban traffic roundabout. Atmospheric Pollution Research 1, 59-70.

  19. Pandian, S, Gokhale, S and Ghoshal, AK (2009) Evaluating effects of vehicle and traffic characteristics on vehicular exhausts emission near traffic intersections. Transportation Research, Part D, Vol. 14 D (3), 180-196.

  20. Gokhale, S, Kohajda, T and Schlink, U (2008) Source apportionment of volatile organic compounds in homes, offices, and outdoor microenvironments using chemical mass balance and genetic algorithm receptor model. Science of the Total Environment, Vol. 407 (1), 122-138.

  21. Gokhale, S and Raokhande, N (2008) Performance evaluation of air quality models for predicting PM10 and PM2.5 at urban traffic intersection during winter period. Science of the Total Environment, Vol. 394 (1), 9-24.

  22. Gokhale, S. and Pandian, S. (2007) A semi-empirical box modeling approach for the prediction of carbon monoxide at an urban traffic intersection. Atmospheric Environment, Vol. 41(36), 7940-7950.

  23. Gokhale, S. and Khare, M. (2007) A theoretical framework for episodic-urban air quality management plan (e-UAQMP), Atmospheric Environment, 41(36), 7887-7894.

  24. Gokhale, S. and Khare, M. (2007) Statistical behavior of carbon monoxide from vehicular exhausts in urban environments. Environmental Modelling and Software , Vol. 22 (4), 526-535.

  25. Gokhale, S. and Khare, M. (2007) Vehicle wake factor for heterogeneous traffic in urban environments. International Journal of Environment and Pollution, Vol. 30(1), 97-105.

  26. Gokhale, S., Rebours, A., and Pavageau, M. (2005) A performance evaluation of WinOSPM model for three streets canyons of Nantes. Environmental Monitoring & Assessment, 100 (1-3), 153-176.

  27. Gokhale, S. and Khare, M. (2005) A hybrid model for predicting the carbon monoxide from vehicular exhausts in urban environments. Atmospheric Environment , Vol. 39 (22) 4025-4040.

  28. Gokhale, S. and Khare, M. (2004) A review of deterministic, stochastic and hybrid vehicular exhausts emission models. International Journal of Transport Management , Vol. 2(2), 59-74.

  29. Gokhale, S. and Patil, R.S. (2004) Size distribution of aerosols (PM10) and Lead (Pb) at traffic intersections in Mumbai. Environmental Monitoring & Assessment , 95 (1-3), 311-324.

  30. Gokhale, S. and Patil, R.S. (2004) Modeling the size separated particulate matter (SSPM10) from vehicular exhausts at traffic intersections in Mumbai. Environmental Monitoring & Assessment , 98 (1-3), 23-40.


  1. Choudhary, A. and Gokhale, S. (2015) Using traffic volume and speed to quantify urban traffic congestion. 3rd Conference of Transportation Research Group of India (CRTG), Paper No. 448, 17-20 December 2015, Kolkata, India.

  2. Padhi, S. K. and Gokhale, S. (2015) A hybrid rotating biological filters to control VOC from waste gas streams. Int. Conf. CHEMCON 2015, 27-30 December 2015, IIT Guwahati, India.

  3. Padhi, S. K. and Gokhale, S. (2015) Optimization and modelling of growth kinetics during benzene biodegradation in batch reactors. Int. Conf. on New Horizons in Biotechnology, 22-25 November 2015, Trivandrum, India.

  4. Hazarika, B. and Gokhale, S. (2015) Secondary pollutants from VOCs in urban indoor air. National Conference on De-polluting Indian Cities, IDC Foundation, 18-19 September 2015, New Delhi.
  5. Singh, N. P. and Gokhale, S. (2015) Estimation of emission source reduction using best-fit statistical distribution of measured pollutants within an urban traffic corridor. National Conference on Challenges in Environmental Research, Indian Institute of Technology Guwahati, June 2015, India.

  6. Padhi, S. K. and Gokhale, S. (2015) Biodegradation of an indigenous microorganism in a batch reactor for gaseous VOC control. Bio Tech 2015., Int. Conf. on Advances in Biotechnology, IIT Kanpur, 13-15 March 2015.

  7. Choudhary, A. and Gokhale, S. (2015) The study of effect of speed and acceleration on auto-rickshaw exhausts emission during urban peak flow condition. Int. Conference on Sustainable Energy and Built Environment, Paper No. TR003,12-13 March 2015, VIT University Vellore, India.

  8. UKIERI (2011) Transport, land use strategies and technology interventions in urban air quality management. February 9-20, 2011, IIT Delhi, New Delhi, India

  9. DIREC2010 (2010) Delhi International Renewable Energy Conference 2010, October 27-29, Greater Noida, India.

  10. Pandian, S. and Gokhale, S. (2008) Capacity estimation of roundabout traffic intersection using alternative analytical models. Int. Congress on Environmental Research. ICER-2008, December 18-20, GOA, India.

  11. Gokhale, S. (2005) Prediction of carbon monoxide levels at urban hotspots using hybrid modeling technique. The National Level Brainstorming Workshop on Indian Urban Air Quality, 24-25 October 2005, NEERI, Nagpur, India.

  12. Bose, R. and Gokhale , S. (2004) Making Way for Public Rapid Transit in South Asia and its Impact on Energy and Environment. BAQ2004, CAI Asia conference, 6-8 December 2004, Agra, India.

  13. Khare, M., Sharma, P., Nagendra , S. and Gokhale, S. (2004) Integrating urban transportation policy: implementing air quality models. Harvard Workshop on Transport Environment, Hyderabad, 28 January 2004, India.

  14. Gokhale, S., Khare, M. and Pavageau, M. (2003) Modeling distributions of air pollutant concentrations from vehicular exhausts in urban environment: A hybrid approach. International workshop on physical modeling of flow and dispersion phenomena. PHYSMOD2003, 3-5 September 2003, Prato, Italy.

Book chapter/Report/Special issue/Editorial/Open journal:

  1. Gokhale, S. (2015) Behavior and fate of natural and engineered nanomaterials in atmosphere. Chapter 10 in Nanomaterials in the Environment, S. K. Brar, T. C. Zhang, M. Verma, R. Y. Suryapalli, and R. D. Tyagi. American Society of Civil Engineers (ASCE) pubs., Reston, VA, 265-291.

  2. Gokhale, S. (2012) Guest editor, A special issue on "Urban Air Pollution Exposure - Measurement, Modelling and Assessment." The Open Atmospheric Science Journal, Bentham Open, Editorial, Vol. 6, 2012, ISSN 1874-2823, pp 61-92.  Link - http://www.benthamscience.com/open/toascj/openaccess2.htm

  3. Gokhale, S. (2010) Traffic in Developing Countries - An Environmental Perspective. Traffic Safety. Chapter No – 06, Edited by Christina Ferraro. Series : Transportation Issues, Policies and R&D – Safety and Risk in Society. Nova Science Inc. ISBN: 978-1-61761-120-9.

  4. Gokhale, S. (2007) Co-guest editor, Special issue on Urban Air Pollution: Control and Management Options. International Journal of Environment and Waste Management (IJEWM), Inderscience Publishers UK, 2006-07.

  5. Bose, R.K., Mukherji, S., Gokhale, S. (2005) Energy, Environment and Mobility in Three South Asian Cities - Making Way for Public Rapid Transit:   Benefits and Opportunities. 2005, Report 2003UG21. The Energy and Resources Institute, New Delhi, India

  6. Rebours, A., Pavageau, M., Gokhale, S. (2003) A report on validation of WinOSPM air quality model for French traffic condition. May 2003. Mise en oeuvre et validation de WinOSPM (Operational Street Pollution Model) sur trois rues de Nantes. Air Pays de la Loire, E-ARs030001- ARs, Mai 2003, Nantes, FRANCE (French Version). Web address : http://www.airpl.org/pdf/Publication00136.pdf

Short-term training course:

  • A short-term training on “Recent trends and technologies in industrial waste treatment and management”. December 3 - 7, 2007, sponsored by AICTE under QIP, IIT Guwahati.
  • A TEQIP course  on "Air quality - modelling and management". April 4 - 8, 2016, sponsored by MHRD, IIT Guwahati.

Thesis Guidance:

Postgraduate (PhD and PDF):

Sr. No. Name of students Thesis title Date of thesis submission/passing
1 Suresh Pandian Traffic flow characteristics and impacts on air quality at urban roundabout junction. 2006-2011
2 Arti Chaudhary Impacts of urban traffic interruption and congestion on vehicular exhausts emissions. 2012-2017
3 N. Premananda Singh A prediction method for estimating exposure of sedentary workers to carbon monoxide along an urban traffic corridor. 2012-2017
4 Susant Padhi Control of gaseous VOCs using a sponge-medium based RBC 2012-2017

PhD interns:

Sr. No. Name of students Thesis title Year/Univ.
1 Buddhi Sapkota Indoor air dispersion simulation using CFD 2015/Tribhuvan University, Nepal
2 Cyrille Mezoueadiang Air quality modeling at traffic intersection 2015/Douala University, Cameroon

Postgraduate (MSc/M.Tech):



Name of students Thesis title Year
1 Neeldip Barman Black carbon in urban neighbourhood 2017-18
2 Nikhil A. Roadside black carbon and traffic impacts 2016-17
3 Vishal Verma Numerical simulation of effects of ventilation on indoor air pollution of buildings next to a street canyon 2015-16
4 Vinod Joshi Deposition of particles in trafficked corridors using biomonitors 2015-16
5 Vidyasagar G. Using CFD to simulate indoor air quality and at a workplace 2014-15
6 Amol Kamble ANN and GA for the prediction of noise levels at an urban traffic junction 2014-15
7 Uday Bhoite A method to analyze spatio-temporal air quality 2014-15
8 Utkarsh Bhautmage Numerical simulation and field validation of CO dispersion in road tunnels 2013-14

Prashant A. Thaker

Numerical simulation of CO dispersion in an urban street canyon with heterogeneous traffic 2013-14

Abhijit K V

Investigation of pollutant dispersion characteristics in street canyon in presence of trees and on-street car parked cars 2013-14
11 Abhay Ananad Simulation of CO dispersion in an underground parking lot using CFD. 2012-13
12 Nilesh jain Mixing coefficient due to wind and mechanical turbulence in an urban street canyon using CFD 2012-13
13 Satya Durga Ch. Ozone and aerosols in the indoor environment of a workplace 2012-13
14 Anusha Kumari A. Traffic characteristics and emission at road intersections. 2011-12
15 Ravindra Patil Uncertainty analysis in air quality dispersion modeling 2008-09
16 Siddilingesh Kambi Indoor-outdoor relationship for carbon monoxide in residential and public buildings located near urban traffic intersection. 2008-09
17 Nagabhushan B. Development of an indoor-outdoor relationship for PM2.5 concentrations in residential and public buildings. 2008-09
18 Praveen Godgula Estimation of on-road emission factors of PM2.5 and PM10 at urban roundabout traffic intersection using semi-empirical modeling approach 2007-08
19 Subhankar B. An AERMOD air quality model to evaluate the impacts of Guwahati Refinery emissions. 2006-07
20 Gokul Bhuyan Development of ARIMA models for forecasting the PM10 and PM2.5 concentrations near urban traffic intersection in winter period 2005-07
21 Namita Raokhande The performance evaluation of models for prediction of PM10 and PM2.5 from vehicular exhausts at traffic intersections in Guwahati 2005-06
22 Tushar Guha Modeling of the aerodynamic properties of trees for boundary layer wind tunnel dispersion studies at low wind velocities, (in association with Karlsruhe University , Germany) 2005-06

(In collaboration with Karlsruhe Univ. Germany under DAAD scheme)

Teaching - Theory/Lab Courses:


  1. CE201: Surveying (3-0-2:8)
  2. ME111: Engineering Drawing (1-0-3:6)
  3. CE307: Environmental Engineering - I (3-0-2:6)
  4. CE315: Environmental Engineering Laboratory (0-0-3:3)
  5. CE441: Air Pollution and Industrial Waste Management (3-0-0:6)
  6. CE661: Air Quality Modelling (3-1-0:8)


  1. CE523: Air and Noise Pollution (3-0-2:8)
  2. CE527: Design of Environmental Engineering System (0-0-2:2)
  3. CE551: Principles of Water Quality & Environmental Legislations (3-0-2:8)
  4. CE570: Air Pollution and Industrial Waste Management (3-0-0:6)
  5. CE661: Air Quality Modelling (3-1-0:6)
  6. NRS171: Environmental Modelling for Air and Noise (at TERI-SAS) (3-0-0:6)

Research and Development Grants:

Project: 5                 Project duration: 3 years            Project Start: 2016-19

Funding agency: Ministry of Earth Science, GoI

Project description: Environmental noise in urban centers and mitigations

The aim of this project is to investigate environmental noise propagation in urban traffic corridors, study impact of environmental factors and investigate mitigations.

Project: 4                 Project duration: 3 years            Project Start: 2015-18

Funding agency: DST, GoI

Project description: Urban black carbon and mitigations

The aim of this project  is to investigate the seasonal levels of black carbon in urban areas, to study the impacts of traffic, contribution to radiative forcing in the N-E region and investigate mitigations.

Project: 3                  Project duration: 3 years           Project Start: 2014-17

Funding agency: Institution of Engineers, India (IEI)

Project description: Episodic air quality in urban traffic corridors

The aim of this research is to identify episodic conditions on urban roads, study traffic flow patterns and characteristics during the identified episodic conditions, and identify the parameters responsible.

Project: 2                Project duration: 3 years             Project Start: 2007-11

Funding agency: Dept. of Science & Technology, India

Project description: Air quality model evaluation for regulatory compliance in India

This research examined the impacts of traffic operations and characteristics on the emissions of CO, NO2 and PM at a signalized intersection and a conventional two-lane roundabout. Further the impacts of traffic pattern and meteorology on the levels and locations of higher concentrations of pollutant CO, NO2 and PM in a response to varying flow conditions and emissions resulted from the traffic operations have been examined.

Project: 1                   Project duration: 1 year           Project Start: 2008-09

Client: Amrit-Bio Pvt. India Ltd. Kolkata

Project: EIA of biomass power plant

The aim of this project was to assess the environmental impacts of 10 MW Biomass based power plant at Baghjap in the Mayong Circle of Morigaon District, Assam.

Professional membership:

  • Fellow, FIE - Institution of Engineers, India.
  • Member, ASCE - American Society of Civil Engineers.
  • Member, ACS - American Chemical Society.
  • Member, IUT - Institute of Urban Transport, India.
  • Member, IWWA - Institute of Water Works Association, India.
  • Member, IMS - Indian Meteorological Society.


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