malaysiang
Manila: Spillway gates of Ambuklao, Binga and San Roque dams have been opened as Severe Tropical Storm Kristine (international name: Trami) continues to dump rains across many areas.
Based on the National Power Corporation’s (Napocor) data on Thursday, Ambuklao Dam’s gate no. 4 was opened at 0.5 m., with a spilling discharge of 59.13 cubic meters per second (cms).
Binga Dam’s gates no. 3 and 4 were both opened at 0.5 m., with discharge of 139.05 cms.
San Roque Dam’s gate 2A was also opened at 0.5 m., with discharge of 52.40 cms.
Earlier, the NPC said the San Roque reservoir elevation needs to be lowered in anticipation of heavy inflow due to Kristine.
As of Thursday, these dams’ water level and normal level are as follows: San Roque 275.73 m. (280 m.); Ambuklao 749.19 m. (752 m.), and Binga 570.97 m. (575 m.)
Other dams managed by the NPC are Angat 198.41 m. (210 m.) and Caliraya 286.80 m. (288 m.)
San Roque Dam
Water released from the San Roque Dam in San Manuel town since 3 p.m. Wednesday will not c
ause flooding in Pangasinan, an official of the National Power Corporation (NPC) San Roque Dam Office said.
One of the dam’s gate was opened Wednesday as a precautionary measure against the impact of Kristine.
In a phone interview Thursday, NPC San Roque Dam Office flood operation manager Teresa Serra said total water released from the dam, including the turbine discharges to generate power, amounted to around 200 to 230 cubic meters per second (m3/s), which flows to the Agno River and its tributaries.
She said the river has a capacity of around 1,400 m3/s.
‘What we released is only a small portion that’s why it would not cause flooding,’ she said in Filipino.
The water level at the San Roque dam as of 11 a.m. Thursday is at 275.73 meters above sea level, with an inflow of 173 cms, she said.
Water in San Roque Dam comes from, among others, the releases of Ambuklao and Binga Dams.
Meanwhile, the Pangasinan Provincial Disaster Risk Reduction and Management Office (PDRRMO) said flooding in some areas in L
ingayen town was due to storm surge caused by the typhoon, while flooding in Dagupan City was due to high tide.
Based on its monitoring, most of the major river systems in the province are still below normal level, although water level in Bued River in San Fabian is already at 6.5 meters, near the 7.8 meters critical level as of 9 a.m. Thursday.
Tropical Cyclone Wind Signal (TCWS) No. 3 is still up in the province. (With reports from Hilda Austria/PNA)
Source: Philippines News agency
