GIS based Emission Modeling


For the development of emission inventory, a bottom up approach has been used for which a GIS (Geographical Information System) based statistical model has been developed by our scientists at IITM to prepare high resolution gridded emission inventory. The emissions have been estimated for the individual sources and for that purpose, an extensive scientific field campaign has been carried out in NCR region during the past several months by involving more than 250 students from different colleges and university in Delhi and Pune by which a noble cause to inculcate the feeling of scientific temperaments in young mind is also achieved. The main focus of the campaign was to generate missing primary data, validate some uncertain secondary data and to collect the available secondary data. During the campaign, information related to following major activities are either generated or collected from relevant institutions regarding the quantity of fuel used, their type and daily usage:

(1) Power (Coal used in all Thermal Power Plants)

(2) Transport Sector (CNG véhicule, diesel, petrol driven véhicules, etc)

(3) Industrial (fuel used in cement, steel, bakery, chemical, metal industries, etc)

(4) Slum Cooking (use and type of kerosene, wood, coal, etc)

(5) Commercial Cooking (in hotels, restaurants)

(6) Street vendor fuel usage survey

(7) Paved /Unpaved Road (dust release)

(8) Industrial /shop Generator sets (Diesel used)

(9) Bio-fuel Burning (dung, crop-residue, wood, bio-mass burning, etc)

To know the traffic volume on different major and minor roads and traffic junction in PMR region, vehicle number density have been counted using click counter at various traffic junction and busy locations in PMR region by students. Delhi has a major road network of nearly 2150 km as compared to minor road network of around 30000 km and it is found that 67% of vehicular density runs on major road. Major traffic junctions contributing to high emission are identified. The sources of emissions are categorized in 4 major sectors