In 10 out of 14 districts, the rainfall in October was twice the long period average.
In the first 20 days of October 2021, every district of Kerala received over 250 mm of rain. In 10 out of 14 districts, the rainfall received in October was twice the Long Period Average (LPA). As the rainfall increased, the water flow into the reservoirs also increased in October, increasing their storage to a very high level. Heavy to very heavy rainfall (64.5 mm to 204.4 mm) has been predicted in Pathanamthitta, Kottayam and Idukki districts on Thursday. Therefore, the inflow into major reservoirs and the resultant seepage (deliberately released excess water from reservoirs) in these districts will have to be closely monitored.
flow down
The graph shows the actual rainfall received in the first 20 days of October 2021 and the % departure from LPA in each district of Kerala.
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five year high
The table compares the rainfall received between October 1 and 20, 2021 with that of the previous October 5. For example, Ernakulam received 457.9 mm of rain between October 1 and 20, 2021, which is 196% of the rainfall in October 2020 and 77% of October 2019. October 2019 was October with the highest rainfall of 13 between 2016 and 2020. district
rising inflow
The graph shows the daily flow of water in major reservoirs. There has been a gradual increase in inflows especially in Idukki and Pamba reservoirs in October. The districts where they are located are likely to receive heavy to very heavy rains on Thursday. In this case, the arrival may increase further.
dam clock
There has been an increase in the storage level (%) of all major reservoirs in October. By 19 October, all of them had crossed the 90% mark. The planned dispersal in Pamba and Idukki reservoirs has already been started. Unlike discharges, spills are not meant for a specific use.
Source: IMD, Kerala State Electricity Board
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