An analysis of the daily district wise rainfall data from India Meteorological Department (IMD) for India’s South West Monsoon 2022 shows that there were 2079 instances when a district rainfall of a day was above 50 mm. Such high rainfall instances included 1712 instances when rainfall was 50-100 mm, 288 instances when it was 100-150 mm, 53 times it was 150-200 mm and 26 times above 200 mm. Out of 694 districts of India, 527 districts or, about 76% of the districts experienced such high rainfall days during SW monsoon 2021.
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High Rainfall days in India’s districts in SW Monsoon 2021
An analysis of the daily district wise rainfall data from India Meteorological Department (IMD) for India’s South West Monsoon 2021 shows that there were 2079 instances when a district rainfall of a day was above 50 mm. Such high rainfall instances included 1712 instances when rainfall was 50-100 mm, 288 instances when it was 100-150 mm, 53 times it was 150-200 mm and 26 times above 200 mm. Out of 694 districts of India, 527 districts or, about 76% of the districts experienced such high rainfall days during SW monsoon 2021.
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High Rainfall days in India’s districts in Sept 2021
An analysis of the daily district wise rainfall data from India Meteorological Department (IMD) for the month of September 2021, the last month of India’s South West Monsoon 2021 shows that there were 489 instances when district rainfall of a day was above 50 mm. The normal monthly rainfall of India for Sept is 170.2 mm and actual rainfall was a huge 34.96% above normal at 229.7 mm[i], the actual average daily rainfall in this month was about 7.66 mm. Such high rainfall instances included 374 instances when rainfall was 50-100 mm, 84 instances when it was 100-150 mm, 20 times it was 150-200 mm and eleven times above 200 mm.
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High Rainfall days in India’s districts in August 2021
An analysis of the daily district wise rainfall data from India Meteorological Department (IMD) for the month of Aug 2021, 3rd month of India’s South West Monsoon 2021 shows that there were 431 instances when district rainfall of a day was above 50 mm. The normal monthly rainfall of India Aug is 258.2 mm and actual rainfall was a huge 24.13% below normal at 195.9 mm[i], the actual average daily rainfall in this month was about 6.45 mm. Such high rainfall instances included 371 instances when rainfall was 50-100 mm, 48 instances when it was 100-150 mm, 11 times it was 150-200 mm and just once above 200 mm. Interestingly, in June 2021[ii] and July 2021[iii] there were seven instances when rainfall was above 200 mm, when the rainfall is supposed to be much below July rainfall. As noted in detailed article[iv], the July 2021 rainfall all over India was 6.7% below normal.
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High Rainfall days in India’s districts in June 2021
An analysis of the daily district wise rainfall data from India Meteorological Department (IMD) for the month of June 2021, the first month of India’s South West Monsoon 2021 shows that there were 442 instances when district rainfall of a day was above 50 mm, which is high considering that the normal monthly rainfall of India in this month is 166.9 mm, or daily average rainfall is about 5.6 mm. Such high rainfall instances included 371 instances when rainfall was 50-100 mm, 59 instances when it was 100-150 mm, 5 times it was 150-200 mm and 7 times above 200 mm. As noted in detailed article, the June 2021 rainfall all over India was 11% above normal.
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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.
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SANDRP 