The meteorological circumstances for the dispersal of pollution are extra adversarial this 12 months in comparison with final 12 months, Central Pollution Control Board (CPCB) officers stated at a technical briefing on air air pollution on Friday, suggesting that air pollution ranges could possibly be comparatively increased this 12 months.
Last 12 months, in September and October, there have been seven wet days that introduced round 121mm rain in comparison with solely three wet days this 12 months in the identical interval that introduced solely 21mm rain. The common air flow index in the identical interval this 12 months is 1,389 m2/s however the minimal recorded was solely 636 m2/s. A air flow index of greater than 6,000 m2/s is taken into account beneficial for the dispersion of pollution, in accordance with CPCB officers.
Prashant Gargava, member secretary, CPCB, stated harvest of the kharif crop and stubble burning has began sooner than regular this 12 months. He added so the height of stubble fires could not coincide with essentially the most adversarial meteorological circumstances this 12 months.
Last 12 months, the contribution from stubble fires to Delhi’s air air pollution peaked on October 31 when it was 44%. Diwali was celebrated on October 27 final 12 months.
“This year, because stubble fires have started relatively early, we are hoping that the peak contribution from fires reduces by the time minimum temperature start falling significantly and before Diwali,” stated Gargava.
Diwali will probably be celebrated on November 14 this 12 months.
Another improvement, which may imply decrease contribution from stubble fires this 12 months, is that space underneath non-Basmati paddy (which leaves stubble that must be disposed of) has decreased in each Haryana and Punjab this 12 months. In Punjab, the realm underneath non-Basmati paddy has decreased from 22.91 lakh ha to 20.76 lakh ha this 12 months. In Haryana, the realm has decreased from 6.48 lakh ha to solely 4.27 lakh ha.
“I have been informed that farmland of over 1 lakh ha has switched over from paddy this year which is a very important development,” added Shiv Das Meena, chairman, CPCB.