Monsoon · Rainfall

June July 2021 District Wise SW Monsoon Rainfall in India

In the just concluded month of July 2021, India received 266.1 mm rainfall, that is 6.73% below normal July rainfall of 285.3 mm, as per India Meteorological Department (IMD). This is in contrast with June 2021 rainfall, that was almost 11% surplus over Normal rainfall. Not only that surplus has been wiped out by the July 2021 deficit, the overall June July 2021 rainfall now is 449 mm, or about 0.7% below normal rainfall of 452.2 mm, as per IMD.

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Monsoon · Rainfall

June 2021: District wise rainfall in India’s SW Monsoon

In the just concluded June 2021, the first month of India’s South West 2021 monsoon, India received 182.9 mm rainfall, 10.96% or about 11% more than the normal June rainfall of 166.9 mm as per India Meteorological department. In June 2020, the rainfall was 196.9 mm, or about 18% above normal and in June 2019 it was 33% below normal.

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Indian Meteorological Department · Rainfall

Pre Monsoon 2021 season – State Wise, District Wise Rainfall

In the just concluded pre monsoon season (March 1 to May 31, 2021) India received 155.2 mm rainfall, 18% above the normal rainfall of 131.7 mm as per the India Meteorological Department (IMD). This is similar to the case in 2020[i] when India received 158.5 mm or 20% above normal rainfall.

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Delhi · Urban Water Bodies

Revival Of Hauz Khas Lake, Delhi: A Pioneering Adventure of INTACH

Guest Blog by Manu Bhatnagar

Even as the water crisis gathers pace time is playing out a requiem for lakes and wetlands. Poor understanding of hydrology, greed driven capture of wetlands by real estate, the adoption of the shortest straight line path by infrastructure development agencies, the effort by engineers to make everything straight and neat by concretization, the plummeting of groundwater tables and the interception of free flowing surface runoff by alteration of basin characteristics are the major drivers of the rapid extinction of our waterbodies.

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Rainfall

District wise Winter 2021 Rainfall in India

In the just concluded Winter Season (Jan 1 2021 to Feb 28 2021), as per India Meteorological Department (IMD), India received 32% below Normal Rainfall. The Normal rainfall in this two-month season is supposed to be quite low at 40.8 mm, but the actual rainfall was just 27.8 mm, which means rainfall was less than 0.5 mm per day in the season. Out of this the Rainfall in January 2021 was 20.2 mm, 17% above the normal rainfall of 17.3 mm. So in February 2021, the rainfall was 7.6 mm, against the normal rainfall of 23.5 mm, so the February rainfall was 68% below normal!

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Rivers · Yamuna River

HOW CAN DELHI TACKLE HIGH AMMONIA CONTENT IN ITS DRINKING WATER?

Guest Article by Manoj Misra

Note: This article is dedicated to the memory of Prof. Brij Gopal who introduced me to the concept of stream standards as different from effluent standards and often lamented former’s absence from our current water pollution control mechanisms. Prof. Gopal passed away suddenly in Delhi on 4 January 2021.   

Public Health demands use of ‘Stream’ standards alongside ‘Effluent’ standards – Law provides for it but the authorities have failed to implement.

Is the city of Delhi condemned to suffer high ammonia content each winter in its drinking water supplies from River Yamuna?

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Rainfall

Post Monsoon 2020: State wise Rainfall

According to India Meteorological Department (IMD), during the just concluded Post Monsoon Rainfall for 2020, that included rainfall during Oct-Dec months, India received 124.6 mm rainfall, 0.64% above the normal rainfall of 123.8 mm during the period. As per IMD[i] definition, the rainfall was thus normal.

This three-month period from Oct 1, to Dec 31 includes the North East Monsoon that mainly affects parts of South India including Tamil Nadu, Puducherry, Rayalseema, parts of Karnataka and Kerala. IMD declared on Jan 1, 2021 that the of NE Monsoon ended on Dec 31, 2020 with normal overall rainfall: TN had 6% above normal, Karnatak 13% above normal, Puducherry 32% above normal, Andhra Pradesh 33% above normal. However, Lakshadweep had 9% below normal and Kerala 26% below normal. This monsoon provides 48% of the annual rainfall of TN so it is most imp for that state.

The rainfall revived only towards the end of November, mainly due to two consecutive cyclones — Nivar and Burevi — both of which developed in the Bay of Bengal. While Cyclone Nivar crossed the coast close to Karaikal near Puducherry and brought heavy showers for the east and coastal districts of Tamil Nadu, Cyclone Burevi weakened before it reached land.

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Rivers · Sand Mining

North India Sand Mining Dialogue under IRW 2020: Local communities need to have key role in governance

The Key message that came through from all the panelists and North India Sand mining presentation was that if we are to see any improvement in the murky state of sand mining that is a threat to everyone today, then we urgently need key role for the local communities and civil society in sand mining governance. The second loud & clear message was that the Supreme Order of 2012 on the need for environmental appraisal and clearance of sand mining leases stands violated in letter and spirit by the Union Government. These messages also provide us the way forward.

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Delhi · Yamuna River

Sau sunar ki aur ek lohar ki – How a single decision sealed Yamuna’s fate

Guest Article by Shri Manoj Misra

Delhiites in early-mid April 2020 were pleasantly surprised to find a much healthy river Yamuna in their city. Social media was full of pictures and videos. Many had resigned not to find a living Yamuna in the city in their lifetime. But the pleasant fact was that the river in the city had indeed as if by magic come alive and presented a picture that was hard to believe. There was a river side which did not stink and looked cleaner than usual.

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Monsoon · Rainfall

Monsoon 2020: District Wise Rainfall

India received 957.6 mm rainfall in Just concluded South West Monsoon 2020, during the scheduled 4 month monsoon from June 1 to Sept 30, 2020. This is 8.74% above normal monsoon rainfall of 880.6 as per India Meteorological Department (IMD). This is considered ABOVE NORMAL rainfall, since rainfall is in the range 4-10% above Normal rainfall. This sounds good at national level, but the situation on ground could be very different, if we see the rainfall across the country.

It is noteworthy as per even IMD, monsoon has not yet withdrawn from most parts of the country. But IMD closes its monsoon rainfall account at 0830 hours on Sept 30, so all rainfall after that hour has to be counted in “Post Monsoon” rainfall book, even though the rainfall is very much part of monsoon as per IMD.

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