The fact that the dams are open is not known for the fact that the deluge led to it

LAST MODIFIED: October 29 2018, 12:49 IST
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The campaign in the state that the dams in Kerala are not open without considering preliminary and warnings, is propaganda that the cause of the great flood in the state is malicious and unrealistic.

Based on the expectations that the meteorological departments of the Indian Meteorological Department (IMD), which predicts the possibility of rain, and the water flow rate expected in the previous years, it is based on the flow of water in the drains of KSEB and water usage.

How was IMD warning?

The first phase of the long-term weather forecasts for the June-September period of April-April was similar to the monsoon season. On May 30, 2018, IMD gave the second phase of the prophecy. In both these predictions, the southwest monsoon is expected to be normal, ranging from 96 to 104 percent of the long term average. In South India it was predicted to be 95%. The availability of predictions for the second quarter of the IMD was released on August 3 and the average rainfall in August-September.

In addition to long-term predictions, the IMD alert is issued on a weekly and daily basis. But these warnings can only be used to impose small-scale restrictions in the final stage of water use.

The weekly bulletin of the 26th of July from August 2 to 8 is the only possibility that the northern part of the country and the teak, including the teak tip, are likely to remain normal. Heavy rain was not predicted for this bulletin.

On August 9, the IMD warned that August 9th to 15th would be the strongest rainfall (115.6 to 204.4 mm) in Kerala and only August 9 would have got only 115.5 mm of rain in the rest of the day. Very heavy rainfall (204.40 mm) was not predicted in Kerala.

There was no warning in this bulletin to be more noticeable than the usual prediction of the IMD. According to this warning, even in the first week of August, there was not even a hint of rain that could have caused the floods.

Preparations for opening dams

The fact that the KSEB did not make any preparations regarding opening the dams, has not been warned at the time.

In fact, since the month of July, in the catchment areas of dams in general and Kerala, in general, there was a strong rain which was different from the IMD forecast.

The second week of July, the dams flowed further. Considering this, all the small hydropower stations in the State have been functioning in full capacity. Smaller dams like Kallar Kutty, Lower Periyar, Kakkayam, Mozhiyar, Pourningal, Sholayar, Banasurasagar were all left open in July.

On July 16, 153.40 in Idukki, 125 in Edamalayar, 120 in Pampa, 188 in Kaki and 263.60 mm in Banasurasagar respectively. Due to the increase in rain and stream, unlike normal mangroves, this year, there has been an increase in production of large hydropower plants like Moolamattam, Sabarigiri and Idamalayar and restricted water to large dams.

On July 25, the KSEB CMD led a high level meeting and decided to take steps to take forward the steps and steps taken to take up the water level for the warning to open the dams such as Idukki, Pamba, Kaki and Edamalayar. Accordingly, the dam administrators and the Disaster Relief Authority have been informed by the Dam Safety Chief Engineer to open the dams if necessary.

By this time different alerts were issued. On July 24, Blue Allert and Orange Alert were issued on 3rd of July. Red alert was issued on August 8th. The blue alert on July 17 at Pampa and the orange allotment on 26th, however, was dropped on 30th due to low rainfall. But on August 9, an orange alert was issued again after heavy rains. On the same day came the red allotment. On July 26 in Idukki the Blue Alert, 30 on orange alert and on August 9 Red Alert were given. On July 25th, blue on July 1, orange on August 1, and red on August 8, the alert was issued. The dams were opened on various days after the alert was issued in various stages. No dams have been opened at night.

But there are no such alerts for Banasura Sagar Dam. Because the Banasurasagar dam is made up of soil. Its full reservoir level and the max reservoir level are the same. Hence the water level will be hovered above the water level and it will affect the security of the dam itself. Therefore, if there is no water in the water, then there is no way to drain the whole of the water into the river.

The water level was increased from the 14th to the 5th of August, and the water flowed out of Banasurasagar dam. The Banasurasagar Dam was opened only after a proper notification was issued to the local media and district administrators. In the wake of the water supply to the dam, the water was cut off from the dam on August 5. From the evening on the evening of August 6, there was a severe rain again in the catchment area. This caused the dam to be opened again on 7th August. This increased the dams shutter gap to a maximum of 290 cm, from about 10 cm to about 59 hours from small doses.

Did the dams open the flood?

Another allegation against the KSEB was that the dams were all open together. If you look at the facts, you can see that the allegation is incorrect.

All the dams of KSEB were released from July and flowed out of the water. The situation was open only in the month of August. One thing to note is that the dams are not exposed to water stored when they open. Instead, only one part of the excess water flow will be exchanged as a result of heavy rains. In the absence of dams, this excess flow will flow through the plains.

The rain received in the second week of August caused the IMD’s long-term predictions and quarterly predictions to bring in excessive flooding of water into dams and plains. This is clear from the observed rainfall received in the dams from August 7 to 20. There were 1645 in Idukki, 1235 in Edamalayar, 1066 in Pampa, 1800 in Kakkiyi and 2598 mm in Banasurasagar.

Due to the heavy rains, the water level in the Dam was recorded in large numbers. But even the flow of water has not fled out of the entire dams. Some estimates show that floods in the plains and rivers of the dam have been caused by heavy rains.

The flood in Periyar

From August 14 to 19, the Idukki dam reached 1186 million cubic meter of floods and only 525 MCM of water was added to Periyar. This means that 661 MCM water was stopped in Idukki dam. Due to the reduced water in the dam, the flow of Periyat flowed to a certain extent and could be reduced to a great extent.

In addition to the strongest stream in the Idukki dam, Mullaperiyar had a maximum capacity of 760 million cubic meters per second (IQ) in the Idukki dam, leaving the Idukki dam to 1600 climax. The maximum amount of water that was opened up to Periyar from 1400 KMAX to 2900 KMM of water was moved to the Periyar river. It is estimated that 7700 climax in the Periyar River washed out from the Barat. The picture shows that from Idukki and Edamalayar dam were only 37% of the water that flowed from Peruthiraket to Periyar. Drinking water into the river below the Bhoothathankettu barrels. Only 56% of the catchment area of ​​the Periyar river is above the demons. The remaining 44% are in the area below the barrels. In view of the water flowing from these areas, the resulting floods in Periyar caused a small portion of the water flowing out of the Idamalayar and Idamalayar dams.

This is not the only situation in Idukki. The dams are not very important for flooding in other areas and the dams are helpful to reduce the floods.

The Flood in Pampayat

The Pampa River also reaches water from Sabarigiri and Kakkad water plants after the release of water from Pampa and Kuki dams. On August 15 and 16, the water reached Pumpayattu – 249 climax from Pampa Dam, 844 from Kakkiyi, 330 from Sabarigiri and 330 from Kakkad.

Following the Pampa and Kaki dam, the two pump fields of Ranni – Peranad and Peruntanaruvi have a reorganization system for measuring streams in the river. The radius range is 2600 Qmax and 2480 Qmaxux in the Perentary. These two Rivers were flown on August 15 and 16. The total flow of water on the Pamba River was more than 5080 cubic meters. Of these, 1473 Quimax, which reached Pampaatta from Pampa, Kuki Dams and Power Corridors, was less than 29% of the total water flowing through the Pamba River. This also indicates that floods did not flood water from dams but contribute to the natural rainfall in Pamba.

Wayanad

Some estimates suggest that the floods in Wayanad were dismissed by Banasurasagar dam. Wayanad has the highest rainfall of 442.60 mm on August 9th. From the Banasurasagar dam to the beaconahalli dam constructed by Karnataka in the Kabini River to collect water from Wayanad, 19.67 mcm water was gone. But the day that 170 metamorphic flow from the beach to the beaconahalli dam reached through Kabaninadi. This indicates that only 12% of the water flowing through Kabini’s Wayanad area flowed from Banasurasagar.

According to the information given by Central Water Authority at Muthanga River Route station in the valley of Banasurasagar Dam, the water flowed on August 7, 8, 2009, was 564, 1018 and 2250 qumax. The water level recorded at the Mananthavadi Rivergate Station in the district was 371, 1019 and 1100Cmax. But in these days, there was only a maximum of 246 quakes per hour from Banasurasagar.

Not only in urban areas, but also flood-catching Kalpetta from the dam, floods were found not only in the towns of August 8, but on the National Highway in the town itself since the morning.

All these indicate that the Banasura Sagar Dam has not played a role particularly in Wayanad flooding.

Why should I change the trial run at Idukki

When the water level reached 2397 feet in Idukki, it was decided to conduct the trial. It was reached on August 8 at night. On the same day, the water level from 169 meters to 169.95 reached the right water level and there was an urgent need to open the Edamalayar Dam by providing red alert.

As the water coming from Edamalayar and Idukki flow together through the Periyar, it was part of the public proposal that it would be enough to open the Idukki dam after the impact of the opening of Idamalayar Dam was removed from the Trail Run for a few hours. This is why August 9th, with all the warnings at 12.30 noon, opened 50mms of water and made a trial run. Though a four-hour train was scheduled, the water level was raised to 2401.10 feet after the red alert level of 2399. The shutters had to open water from 8 am on August 10.

There was also allegation that the Edamalayar fired suddenly on the watchtower gate that shifted from Sholayar to the Chalakududupuzha river to the right. But the fact is that the gate was not installed for water control at the Watcher. At the entrance to the Chalakudy River, a divergent divergence is made to transport a part of the water to the Idamalayar to prevent the loss of water. The fact is that some of these pipes will reach the Edamalayar. Or this is the water that goes out of the shawl fudge. There is no way to pay for this mechanism.

Why do not the dams open soon?

The floods had already been dispersed by floods and the floods had to be flooded.

The shutters of the Idukki dam were particularly likely to be opened before reaching 2397 feet. The bottom portion of the shutters of Idukki dam (ie shutter) is 2373 feet. This means that if the water level in the dam is above 2373 feet, the shutter opens up and the water starts to flow. The water level in the Idukki dam reached 2373 feet on July 17. That is, since July 17, the water was supposed to have opened water. A small amount of water could be opened up to 50 to 100 KM of water without causing harm to the bridge through the Cheruthoni bridge. In this situation, it would have been necessary to open up many families.

But in the absence of water in advance, the actual release of the dam is 939 MCM of water released from Idukki dam between August 9 and 28 August. Is. This means that the maximum amount of water that could be thrown in advance would have only 10% of the total water released so far.

If the water was drenched in advance and the heavy rain did not come as expected, we would have missed the water unnecessarily and created an electricity crisis.

The KSEB crisis is in crisis

In general, it is commonly understood that the KSEB has the profits of crores worth crores. The fact is that improved rain has helped to generate hydro power production and collect water at the dam.

But the fact is that thirty percent of the power requirement of the state can be generated from hydroelectric projects under Kerala. The loss to KSEB in floods and floods is very large. 5 large hydro power stations have been damaged. 50 Substations were stopped at the flood waters. Four small power plants were completely flooded. 16158 transformers have been turned off. Over 30000 posts have been lost. More than 4,000 kilometers of access lines were under water. In many places, electricity lines were cut off. Over 25 lakh electricity connections have been lost. The preliminary loss to the original is Rs 350 crore. Besides, the KSEB will be affected due to floods in case of production loss.

All these are to be reconstructed and replicated as Mission-Replicates. Employees at all levels at the KSEB are trying very hard to overcome this crisis. In this context, the KSEB is trying to deflect attempts to create controversial arguments. We hope that support for all sections of people.

Chief Public Relations Officer