Mountains in the Chaning World, Mountains in the Chaning World

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AIR POLLUTION IN KATHMANDU: ON-ROAD TRAFFIC CONDITION AND VEHICULAR EMISSION OF PASSENGER VEHICLES
Nita Khanal, Rejina Maskey, Prakash Bhave, Siva Praveen Puppala

Last modified: 2017-08-24

Abstract


Air quality deterioration is one of the utmost concerns in Kathmandu. The study presents the emission status of Diesel Bus, Minibus and Microbus and importance of low cost maintenance on emission reduction.  First part of the Study demonstrates on emitter’s proportion of passenger vehicles based on types, color plates and location. On other parts maintenance pattern of the vehicles were observed. Vehicle count survey was conducted on six locations of ring road and inside/outside of ring road from 6:00 A.M to 6:PM. Maintenance survey was conducted with 96 vehicles drivers and 18 local maintenance centers. Vehicle count survey showed that 35% of passenger vehicles were emitters among 5633 vehicles where as Bus had maximum shares i.e. 42% among all. On other side Maintenance interval of buses was 16500 km in average where as microbus was 5006 Km. With increase of Black Carbon other toxic pollutants concentration are supposed to be increase.  Public vehicles were major polluters among all and shares 35 to 58% of all public vehicles mainly on Ring road section.  From the maintenance survey 73% of routinely maintained vehicles were found to be non emitters and 69% non-routinely maintained vehicles were emitters. This results shows that Routine maintenance of vehicles is effective way to reduce vehicular exhaust.


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