The rush of water along Siang river in Arunachal Pradesh after the Tibet landslide block breached on Friday reached Pasighat and downstream Assam at around 10.30 this morning.
Though surging water refilled the drying up Siang river in Siang belt of Arunachal and downstream Assam in the morning, yet water is flowing below the danger mark till this evening.
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Report from Water Resource department at Pasighat this evening said that of water flow of Siang river was slightly rising since 10.30 am.
Thus, water level of Siang, which was rising upto 5 to 6 feet at Pasighat and Oirmaghat portions, is flowing below the danger level.
The barrier lake was created on Wednesday morning following the collapse of a cliff in the deep valley through which the river flows.
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The cause of the landslide is believed to be natural, and there was no report of any earthquake in the area in the recent past.
The first rush of water reached Tuting in upper Siang district of Arunachal Pradesh on Friday night and was moving downstream with large waves.
The surging water of Lali and Siang river has inundated low lying portions of Kobu Chapori island at Jonai in Dhemai district, while water is entering in human habitations at Bahir-Jonai villages through the breached embankment.
Around 200 villagers from Kobuchapori were evacuated from the island this morning, but rest 400 villagers are still taking shelter on the highlands.
Meanwhile, East Siang (Arunachal), Dhemaji and Dibrugarh district administration have sounded high alert and suggested the riverine villagers for shifting to safe places.
As per latest report received this evening (at 7.30 pm), water level of Siang has started receding in Upper Siang and Siang districts of Arunachal Pradesh, while it is remaining stable at Pasighat and Oiramghat (Jonai) in downstream Assam.
The biggest ever exercise of disaster management in Arunachal ended late Saturday evening as sudden high-volume water discharged from river Yarlung Tsangpo in Tibet, flowed along the 300 km length of Siang River without causing any damage.
The exercise involved officials of the highest level in New Delhi, who spent a sleepless night to ensure minimum damage after the Chinese embassy in India alerted India about the overflowing of a landslide-induced barrier on the Tsangpo on Friday.
In a first of its kind disaster management operation in the State, the Union Home Ministry pressed into service all available government agencies such NDRF, IAF, CWC, and ISRO, Disaster Management Secretary Bidol Tayeng said in a statement.
The overflow at the landslide location, 80 km downstream of Nuxia Hydrological Station, at river Yarlung-Tsangpo started at about 2:30 pm on Friday.
The water rushed down and reached Tuting at about 10:37 pm on the same evening. It then reached Yingkyiong at about 01:37 am on Saturday.
Union Cabinet Secretary Pradeep K. Sinha reviewed the situation on Saturday evening via a video conference with Chief Secretary Satya Gopal and the Chinese embassy. The Chinese side said that there is no existence of any lake or dam at the landslide location in Tibet.
On the other hand, a team of Dibrugarh district administration lead by the DC Laya Madduri, SP Gautam Bora and officers from Water Resource Department visited the Brahmaputra river bank near SP office in Dibrugarh on Saturday.
Speaking to mediapersons, the Deputy Commissioner said that the district administration has taken adequate measures to tackle any eventuality in case of sudden rise in water level in river Brahmaputra.