UBAY, Bohol – If no outpouring of rain in the coming days, the huge irrigation dams in Bohol would be in critical condition as the water of these irrigation facilities is evaporating. The situation alarmed farmers/irrigators of the dams’ service areas. Farmers/irrigators would probably be suffering in the next planting season due to dams’ serious condition.Bohol has four major dams. Malinao Dam in Pilar town serves some 4,700 has.; Bayongan, San Miguel, 5,300 has.; Capayas dam, Ubay, 1,100 has.; and Talibon town, about 1,000 has.
In an ocular visit yesterday, the dams here and Bayongan showed cracks on its surroundings shores, exposing its banks’ water low level contrary to what it used to be that no cracks or water level marks could be seen during normal condition or if filled with water. Quoting news report, some farmers interviewed said that National Irrigation Administration (NIA) should not downplay the critical condition of these dams.
In a bid to arrest this scenario, officials are mulling for cloud seeding in these areas for possible rain. The proposed cloud-seeding activity to save rice lands from further destruction due to lack of water from irrigation dams.
Cloud seeding is a “technique of stimulating or enhancing precipitation by distributing dry ice crystals or silver iodide particles over developing storm clouds in a specific area of the atmosphere.”
Bayongan dam inaugurated by then President Gloria Macapagal-Arroyo on October 12, 2007 is an earthfill type with a height of 35.5 meters and length of 855 meters. Its embanckment volume is 1.1 million cubic meters with tunnel intake type and ungated spillway which can discharge some 74 cu.m./second.
Its reservoir area is 314.8 square km with normal surface water level at 52 meters and low water level at 41 m. It has a total reservoir capacity of 34.6 million cu.m. (CMC) but its “dead” reservoir capacity is 9.5 CMC. Its canal capacity is about 6.36 CMC.
Bayongan’s main canal is about 17.73 kilometers and lateral (canal), 41.62 kms. It covers the towns of San Miguel, Ubay and Trinidad with some 5,300 hectares as its service areas. (rvo)