DIMAPUR, AUGUST 4 (MExN): Due to incessant rainfall in the upper catchment area of the Doyang river, water level at the MW Doyang HE Plant reservoir has increased abruptly since July 27, 2018.
According to a press statement issued by the North Eastern Electric Power Corporation Limited (NEEPCO), the inflow to the Doyang reservoir was more than 600 cu m/sec since July 27 and it went more than 1150 cu m/sec on July 30 which is much higher than the normal range of inflow.
This has necessitated release of excess water by opening the gates. NEEPCO had to open the radial gates on July 27 to release the excess water in controlled manner. The excess water beyond the capacity of the reservoir flows to the downstream area which cannot be absorbed by the reservoir.
The information in regard to increase of water level has been shared with the Golaghat District Disaster Management Authority on regular basis as decided in the meeting held on May 17 at conference hall of DC office, Golaghat, NEEPCO stated. The meeting was convened by DDMA, Golaghat with NEEPCO for better coordination for early warning and flood forecast and to discuss the modalities of flood preparedness.
It stated that the Doyang dam cannot absorb the water beyond its capacity at any point of time and rather, Doyang dam contribute to flood moderation to its present water holding capacity up to EL 324.0 M.
The recent flood in the Golaghat District is due to unprecedented rainfall in the entire catchment of Dhansiri river of which the Doyang catchment is only a part. Due to the existence of Doyang storage reservoir, the flood peak is getting moderated to the extent the capacity of the reservoir permits, NEEPCO informed.
In this regard, Doyang project authority is maintaining a close contact with the concerned district administration and information regarding release of excess water through the spillway gate is being shared well in advance enabling actual flood forecasting, it added.
The 3x25 MW Doyang HE Plant in Wokha district of Nagaland is developed by NEEPCO on Doyang river, one of the tributaries of Brahmaputra. The Project comprises of 92 m high rock-fill Dam having live storage capacity of 216.5 MCum at EL 324.0 M and intercepting a catchment area of 2606 sq.km.
The entire quantum of power from the plant has been allocated to all seven states of NE Region where Assam has a share allocation of 43.8 %.
