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.

Continue reading “District wise Rainfall in India in June July 2020”

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].

Continue reading “State wise rainfall Pre Monsoon 2020 & Post monsoon 2019”

Agriculture · Disasters · Rainfall

44% above normal rainfall in Oct 2019 creates hopes for Rabi, Disaster for Kharif crops at many places

The Oct 2019 rainfall all over India was 109.7 mm, 44% above normal expected rainfall of 76 mm, following 53% above normal in Sept 2019. The rainfall this month has been unusual and has had some major impacts. One of the reasons has been that the SW monsoon withdrawal continued well into Oct 2019, when it almost always gets over by the end of Sept. There were also several cyclonic circulations and depressions mostly from Arabian sea. Continue reading “44% above normal rainfall in Oct 2019 creates hopes for Rabi, Disaster for Kharif crops at many places”

Sand Mining

North East India Sand Mining 2018: Emerging threat to Rivers

Thoubal River 

Manipur DFO bans mining in Thoubal river Showing serious concerns to the degradation of the Thoubal River as well as its environment, a team of state police and Forest department officials led by District Forest Officer (DFO) RK Amarjit paid surprise visit at Moirang Purel and Itham area under Andro Assembly constituency where sand mining was underway at mass scale. During the inspection visit the govt official saw illegal excavation of soil from nearby hills of the area and dump it at Thoubal River for extraction of red sand.

As the mining of sand not only endangered the forest area of the surroundings but also degrades the condition of the Thoubal River, the DFO put immediate ban on the sand mining as well as excavation at hills of the surroundings. He also ordered ban on transportation of red sand in Thoubal and Kakching district. http://kanglaonline.com/2017/11/dfo-thoubal-swings-into-action-bans-sand-mining-at-thoubal-river/ (21 Nov. 2017) 

Continue reading “North East India Sand Mining 2018: Emerging threat to Rivers”

Dams · Floods

Overview of CWC Flood Monitoring Sites 2018: INDIA

Central Water Commission is the only agency doing flood forecasting in India. As per CWC’s Flood Forecasting website[i] the Data Flow Map has information about 226 Flood Forecast Sites in the country comprising of 166 Level Forecast Sites and 60 Inflow Forecast Sites. It also monitors 700 Flood sites, information made available through List Based Exploration and Hydrograph View, but no flood forecasting is done for these sites.

In order to better understand the CWC’s flood monitoring and forecasting work, SANDRP has published report of CWC’s Level Forecast, Inflow Forecast and level monitoring sites in 5 zones of North India[ii], North East India[iii], East India[iv], South India[v] and West India[vi].  Through this report, we have presented all the data at one place with links to separate zone wise reports with detailed description.

Continue reading “Overview of CWC Flood Monitoring Sites 2018: INDIA”

Monsoon

The mirage of normal monsoon

According to IMD, India is having normal monsoon this year, so far, as per rainfall till date (Sept 1, 2018). Against normal rainfall of 721.1 mm, India has received 676.6 mm rainfall, which is 6.2% below normal, considered within normal rainfall definition as per IMD. So India is having normal monsoon rainfall, says IMD. Let us check this against some ground realities.

However, East and North East India, one of the four regions for which IMD provides rainfall data, has so far had 27% below normal rainfall, while South India had 9% surplus rainfall.  Thus, while at all India level, what seems all normal, is average of different, though serious departures from normal rainfall. Let us say this is first level of mirage of normal rainfall. Continue reading “The mirage of normal monsoon”

central water commission · CWC - Central Water Commission · Floods

Reply to CWC response on SANDRP’s article on CWC’s flood forecasting in NE India

On Aug 5, 2018, SANDRP had uploaded blog[i] titled: “Overview of CWC’s Flood Monitoring & Forecasting in North East India”. CWC posted its 3-page reply to it around 7 pm on Aug 7, 2018.

Firstly, we welcome CWC’s reply to SANDRP blog. Here some responses to the content of what CWC has replied. Continue reading “Reply to CWC response on SANDRP’s article on CWC’s flood forecasting in NE India”

Assam · brahmaputra · Dam Induced Flood Disaster · Floods

Role of Doyang Dam in bringing unprecedented floods in Golaghat

When Dhansiri river broke the highest flood level mark at Numaligarh site in early hours of Aug 2, 2018 in Golaghat district in Assam, it was not only completely out of the blue, the whole episode was unprecedented.

The earlier Highest Flood Level of Dhansiri River at Numaligarh was 79.87 m. The new HFL, it seems, was 80.18 m, full 31 cm above the previous HFL. This is rather rare, normally the new HFL would be a few cm higher, not almost one third of a meter. Secondly, the water level remained above 79.87 cm, the old HFL, for over 60 hours. This is also unusual, normally the water level rarely remains above HFL for more than a day or so. Thirdly, the earlier HFL was achieved on Sept 24, 1985, so this sudden episode of flood was breaking 33 year old record. Continue reading “Role of Doyang Dam in bringing unprecedented floods in Golaghat”