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It is noteworthy as per even IMD, monsoon has not yet withdrawn from most parts of the country.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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CWC - Central Water Commission

North India; CWC Flood Forecasting Sites 2020; New Website Old Problems

Flood forecasting is an important activity during monsoon, considering the huge and increasing flood prone area, flood frequency, intensity and flood damages. Accurate and timely flood forecasting can hugely help reduce the damages due to floods. Central Water Commission (CWC) is the only agency responsible for flood forecasting in India. To understand the CWC’s flood forecasting better, we have compiled the list of the various flood, inflow forecasting sites and flood monitoring sites in India.

In this compilation, we have given state wise list of CWC’s level forecasting, flood monitoring and inflow forecasting sites in North India, comprising of Union Territories Jammu & Kashmir, Ladakh, Chandigarh, Delhi and states of Himachal Pradesh, Uttarakhand, Punjab, Haryana  and Uttar Pradesh. It includes available details like name of river, sub basin, Warning level (WL), Danger Level (DL), High Flood Level (HFL), Full Reservoir Level (FRL), Maximum Water Level (MWL), as applicable. As we see below, there are many gaps in this basic information for the sites that are part of CWC’s list. A similar zonewise overview of CWC’s sites was compiled in 2018 and 2019, which can be seen here: Overview of CWC Flood Forecasting Sites 2018: North India; Overview of CWC Flood Forecasting Sites 2019: North India. We have brought this updated compilation for 2020 as there are large number of changes.

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Delhi · Rivers · Urban Rivers

NAJAFGARH JHEEL – SAGA OF A FORGOTTEN RIVER

Guest Article by: Ritu Rao

A short drive on the Golf Course Road in Dwarka followed by a turn towards Goyla Dairy and subsequently a sharp left just short of Goyla Dairy brings us to the famous Inspection Road /Embankment Road. Flanked by Najafgarh Drain on one side and the arable lands of Delhi on the other, the embankment road was constructed after the 1964 floods of Delhi. The thick mud embankments are covered with trees and shrubs which provide the much-needed habitat for the local flora and fauna to thrive. This thicket starts clearing off after Jhatikara crossing (say after about a half an hour drive on this road) and the Najafgarh drain suddenly transforms into a vast expanse of water known as the Najafgarh jheel. This spectacular sight continues for a good 5-6 kms before it once again narrows down into a stream. The road meets the now extinct Sahibi Nadi and Outfall from Drain No.8 at Dhansa, 5 km upstream of the jheel. The Sahibi Nadi which originates in Jaipur district and drains parts of Rajasthan, Haryana and Delhi, now has diminished flow and disappears in the arid soil near Dharuhera after the Masani Barrage in Haryana. Once fed by the Sahibi nadi and storm water runoff from the surrounding areas, the Najafgarh jheel is now fed primarily by the waste water from the Badshahpur Drain and the Outfall Drain No.8 and the rain water in monsoons.

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Indian Meteorological Department · Monsoon · Rainfall

District wise rainfall in June-Aug 2020 in India

In the ongoing South West Monsoon, India received 44 year old high surplus rainfall of 327 mm in just concluded Aug 2020, 26.6% above normal rainfall of 258.2 mm. This helped the total June-Aug 2020 rainfall to achieve 10% surplus, with actual rainfall 780.3 mm, 69.9 mm higher than normal rainfall of 710.4 mm. In June the country received 18% above normal rainfall and in July it received 9.9% below normal rainfall, the rainfall at the end of June was just 1.1 mm above normal. Thus almost the entire surplus rainfall is thanks to the rainfall during Aug 2020. The rainfall distribution has however, been far from normal that these figures suggest, as we can see from the state wise and district wise figures below.

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Monsoon · Rainfall

District wise Rainfall in India in June July 2020

During the just concluded first half of the South West Monsoon 2020, India received 453.3 mm rainfall, just 1.1 mm above the normal rainfall of 452.2 mm during the period. The Surplus of  18% rainfall that India received in June 2020 has thus been wiped out by the 9.9% deficit in July rainfall. Normal rainfall in July 2020 is 285.3 mm, while actual rainfall was 257.1 mm. IMD does not provide monthly figures of rainfall for different states, sub divisions and river basins, which it should along with comparison with respect to normal rainfall and rainfall last year.

To get July 2020 rainfall, we will need to use the figures given in this article along with the figures of June 2020 rainfall (see: https://sandrp.in/2020/06/30/district-wise-rainfall-in-india-in-june-2020/). The district wise figures of June-July 2020 rainfall can be seen in this PDF file from IMD: IMD DISTRICT WISE RAINFALL FROM JUNE 1 TO JULY 31 2020.

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DRP News Bulletin

DRP NB 27 July 2020: China’s Three Gorges Dam may be safe for now, but at what cost?

International media has been full of stories this last few weeks, about the likely fate of the world’s biggest dam project: The Three Gorges Dam of China. The stories ranged from possible imminent threat of collapse of the dam to those from China that rubbished all such ideas. Part of it was fuelled by the World’s anti China mood due to the Covid and its expansionist activities including at Indian borders. But part of the reason was the difficulty to getting hard facts, since China does not have free media or democracy and suppresses any critical information. One direct evidence of this Chinese tendency was apparent when Reuters was the first one to publish on July 22, 2020, the story of a dam collapse in China on June 7, full 45 days after the event and even that story could not find any official to quote about the dam collapse. A more telling example of China’s tendency to suppress basic facts would be difficult to come by from recent times. Continue reading “DRP NB 27 July 2020: China’s Three Gorges Dam may be safe for now, but at what cost?”

Dams · Urban Water Sector

Delhi Drinking Water Canal gets toxic mix

In May 2019 SANDRP wrote, with photo evidence, after a visit to the Drain No 8 that brings Delhi’s drinking water that it is running next to drain no 6 carrying untreated industrial toxics from Haryana, with only sand bags separating the two. A visit on 21st July, 2020 provided video proof that water from drain no 6 is still happily mixing with drain no 8 at several places.

A visit to drain number 8, one of prominent canal carrying potable water supply of national capital can be shocking experience to anyone concerned with water quality and health of people. The canal (called escape) flows close to Delhi Haryana border in Sonipat district. The drinking water in the escape is being repeatedly contaminated with all sorts of industrial effluents.

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Indian Meteorological Department · Monsoon · Rainfall

District Wise rainfall in India in June 2020

Here we present the rainfall figures from India Meteorological Department in the just concluded month of June 2020, the first month of SW Monsoon 2020. The overall rainfall at all India level in June 2020 was 196.2 mm, 18% above normal rainfall in the month at 166.9 mm. It was 33% deficit last year.

This is India’s wettest June 12 years, The Times of India reported on July 1, 2020. Agriculture Ministry Data shows that sowing is 68% higher at 31.56 m ha. The June rainfall was 202 mm in 2008, the rainfall this year is the highest since then. All four IMD regions (Northwest, Central, South, East & NE) have recorded surplus rainfall, the surplus is the highest in Central (30.5% surplus) and E-NE (15.7%) regions. North West India had the lowest surplus at 3.5%. IMD Head Mrutyunjay Mohapatra said that whole of India was covered by monsoon on June 26, 12 days ahead of the normal date of July 8.

State wise rainfall Three states had large excess rainfall (above 60% surplus rainfall), namely Bihar, Madhya Pradesh and Sikkim. Eight states/UTs (Union Territories) had excess rainfall (20-59% surplus): Assam, Meghalaya, UP, Chhattisgarh, Maharashtra, Telangana, Andhra Pradesh & Andaman and Nicobar. Nine had deficient rainfall (20-59% deficit): Lakshadweep, Mizoram, Manipur, J&K, Ladakh, Himachal Pradesh, Delhi, Dadar & Nagar Haveli. Rest of India had Normal Rainfall. Continue reading “District Wise rainfall in India in June 2020”

Rainfall

State wise rainfall Pre Monsoon 2020 & Post monsoon 2019

India Meteorological Department (IMD) divides a water year (June 1 to May 31) into four seasons: Monsoon: (June 1 to Sept 30), Post monsoon (Oct 1 to Dec 31), Winter (Jan 1 to Feb 28/9) and Pre Monsoon (March 1 to May 31). For rainfall during all these seasons, IMD’s hydro-meteorological website[i] provides a lot of data on daily basis, including daily district wise rainfall, state-wise, sub division wise and river wise daily rainfall maps among many other weekly, monthly and seasonal products. However, one problem with it is that none of this information is achieved. So if you missed seeing or downloading available data on any date, there is no way to look at it even next day. This is even true of the seasonal rainfall maps, unfortunately.

Most observers look at the monsoon rainfall data, which is clearly the most important season, without doubt. However, the rainfall in other seasons is also very important from a number of perspectives.

Here we are giving a detailed account of the pre-monsoon season rainfall that India received in the season just ended on May 31, 2020, including state wise, sub division wise, river wise and also district wise figures. Along with it, we also provide the figures of post monsoon figures for the just concluded water year. For the winter season (Jan-Feb 2020) we have only the figures for Jan 2020 since we missed downloading the Feb 2020 figures. We had already provided the monsoon 2019 figures through two blogs in October 2019[ii].

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Dams · Floods

Augmentation canal breaches becoming new normal in Haryana

On May 17, 2020 the residents of Ranwar village in Karnal woke up to find their village surrounded by gushing water current which was fast entering their homes. The cause of the flooding was a breach[i] in augmentation canal running close to the village.

The incident was allegedly caused by a small hole at 60.200 point on left bank of the canal around 03.00 am gradually turning into a 40 to 50 feet wide breach by the noon same day. Before the local administration could get into action, around 250 acres of farm lands around the village was flooded.

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