Sunday February 24, 2019

Mornings are worst air pollution times in Delhi and other major cities

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A view of Delhi: Wikimedia Commons

If you think mornings are the best time for outdoor exercise, you’re wrong.

Mornings experience the worst air pollution in four Indian cities, according to an analysis of particulate matter (PM) 2.5 data from IndiaSpend’s #Breathe air-quality sensors in Bengaluru, Chennai, Delhi and Mumbai between March 15 to April 15 2016.

Delhi: Best air quality —4 pm

Mornings were the worst time, with PM 2.5 levels reaching as high as 108.16 µg/m3 at 7 am. Air quality gradually improved as the day wore on, registering the cleanest air at 4 pm. (22.84 µg/m3). Pollution levels then picked up through the night.

Delhi topped the list of the world’s most-polluted cities, according to the World Health Organisation (WHO).

Bengaluru: Best air quality–midnight

The worst air was at 7 am, as PM 2.5 concentrations peaked at 61.54 micrograms per cubic metre of air (µg/m3). The air quality improved as the day wore on, worsening by evening at about 5 pm, reaching a late-evening high at 7 pm (57.60 µg/m3). The best air quality was registered around midnight, when PM 2.5 levels fell as low to 40.12 µg/m3.

Chennai: Best air quality—3 pm

The worst air was at 7 am, with PM 2.5 levels (61.54 µg/m3) reached their peak. Levels began to peak over the night and slide during the day, after 7 am. The best air quality was recorded in the afternoon, at 3 pm, with PM 2.5 levels reaching as low as 20.76 µg/m3.

 

Mumbai: Best air quality—5 pm

The worst hour for a Mumbaikar is 8 am, with PM 2.5 levels reaching 48.61 µg/m3; the air started to worsen after 5 am. The best air quality was registered at 5 pm, when PM 2.5 levels were 22.38 µg/m3.

Outdoor air pollution causes 670,000 deaths annually in India, according to a 2014 research paper from the Indian Institute of Management-Ahmedabad.

Air pollution has become a global concern with rising air pollution levels, as outdoor air pollution in cities and rural areas across the world estimated to cause 3.7 million premature deaths in 2012, according to the WHO.

Particulate matter is the term for particles found in the air, including dust, dirt, soot, smoke, and liquid droplets. These are classified according to their diameter. Particles less than 2.5 µm (micrometres) are called PM 2.5. They are approximately 1/30th the average width of a human hair. Particles between 2.5 to 10 µm in diameter are called PM 10.

PM 10 and PM 2.5 include inhalable particles that are small enough to penetrate the thoracic region of the respiratory system. The health effects of inhalable PM are well documented, caused by exposure over both the short-term (hours, days) and long-term (months, years). They include: Respiratory and cardiovascular morbidity such as aggravation of asthma, respiratory symptoms, and an increase in hospital admissions; and mortality from cardiovascular and respiratory diseases and from lung cancer.

There is good evidence of the effects of short-term exposure to PM 10 on respiratory health, but for mortality, and especially as a consequence of long-term exposure, PM 2.5 is a stronger risk factor than the coarse part of PM 10.

There is a close relationship between exposure to high concentrations of small particulates (PM 10 and PM 2.5) and increased mortality and morbidity from cardiovascular/respiratory diseases and cancer, both daily and over time, according to the WHO.

(In arrangement with IndiaSpend.org, a data-driven, non-profit, public interest journalism platform. The views expressed are those of India Spend. Feebback at respond@indiaspend.org)

–IANS/IndiaSpend

Next Story

Three Projects Help India to Stop its Share of Water to Pakistan after Pulwama

The waters of the western rivers - the Indus, Jhelum, and Chenab - averaging around 135 MAF, were allocated to Pakistan.

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Picture Courtesy:-www.economylead.com

The government has envisaged three projects to give intent to its decision to stop its share of water from three eastern rivers of the Indus system – the Beas, Ravi and Sutlej – from going to Pakistan.

The decision was affirmed by Water Resource Minister Nitin Gadkari on Thursday in the wake of Pulwama terror attack though the Union cabinet had approved implementation of one of the key projects – Shahpurkandi dam – in December last year.

The waters of the western rivers – the Indus, Jhelum, and Chenab – averaging around 135 MAF, were allocated to Pakistan except for “specified domestic, non-consumptive and agricultural use permitted to India”, according to a treaty.

India has also been given the right to generate hydroelectricity through run-of-the-river (RoR) projects on the western rivers which, subject to specific criteria for design and operation, is unrestricted.

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However, about 2 MAF of water annually from Ravi is reported to be still flowing unutilised to Pakistan. VOA

To utilise the waters of the Eastern rivers, India has constructed the Bhakra Dam on Satluj, Pong and Pandoh Dam on Beas and Thein (Ranjitsagar) on Ravi. These storage works, together with other works like Beas-Sutlej Link, Madhopur-Beas Link and Indira Gandhi Nahar Project have helped India utilise nearly the entire share (95 per cent) of the eastern river waters.

However, about 2 MAF of water annually from Ravi is reported to be still flowing unutilised to Pakistan. The other two projects are Ujh multipurpose project and the second Ravi Beas link below Ujh.

Here’s the reality check of the three projects:

Shahpurkandi Project: It aims to utilise the waters coming from powerhouse of Thein dam in order to irrigate 37,000 hectares of land in Jammu and Kashmir and Punjab by generating 206 MW of power.

The project was scheduled to be completed by September 2016. However, following a dispute between the two states, work was suspended in August 2014 but they reached an agreement last September and the construction work has now resumed with the Centre monitoring its progress. The central government had in December last year announced assistance of Rs 485 crore for the project and it would be completed by June 2022.

 

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The decision was affirmed by Water Resource Minister Nitin Gadkari on Thursday in the wake of Pulwama terror attack. VOA

The project will create irrigation potential of 5,000 hectare in Punjab and 32,173 hectare in Jammu and Kashmir.

Officials said that some water of the Ravi is going waste through the Madhopur Headworks downstream to Pakistan and it is required in Punjab and Jammu and Kashmir.

The total balance cost of pending work in ShahpurKandi Dam project is estimated Rs 1,973.53 crore (irrigation component: Rs 564.63 crore, power component Rs1408.90 crore).

The Shahpurkandi Project was initially approved by the Planning Commission in November, 2001. Revised costs were approved, but there was delay in its execution both because of lack of funds with Punjab and inter-state issues with Jammu and Kashmir.

An agreement was finally reached between the two states under the aegis of Water Resources Ministry in September last year.

Ujh multipurpose project: Construction of the Ujh multipurpose project will create a storage of about 781 million cubic metres of water on Ujh, a tributary of Ravi, for irrigation and power generation and provide a total irrigation benefits of 31,380 hectares in Kathua, Hiranagar and Samba districts of Jammu and Kashmir.

The total estimated cost of the project is Rs 5,850 crore and the Central assistance of Rs 4,892.47 crore on works portion of irrigation component as well as the special grant is under consideration. The project is yet to be implemented and it will take about six years for completion.

Second Ravi Beas link below Ujh: The project has been planned to tap excess water flowing down to Pakistan through Ravi by constructing a barrage across it for diverting water through a tunnel link to the Beas basin.

The project is expected to utilise about 0.58 MAF of surplus waters below Ujh dam by diverting the same to the Beas basin.

 

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Officials said that some water of the Ravi is going waste through the Madhopur Headworks downstream to Pakistan and it is required in Punjab and Jammu and Kashmir. Wikimedia

The water distribution treaty between India and Pakistan was brokered by the World Bank in 1960 to use the water available in the Indus system of rivers originating in India.

 

ALSO READ: IOC Cancels Places for 2020 Tokyo Games from India after it Refused Visas to Pakistan

The Indus system comprises Indus, Jhelum, Chenab, Ravi, Beas and Sutlej rivers. The basin is mainly shared by India and Pakistan with a small share for China and Afghanistan.

Under the treaty signed between India and Pakistan in 1960, all the waters of the three eastern rivers, averaging around 33 million acre feet (MAF), were allocated to India for exclusive use.  (IANS)